Revert "Zepp OS: Unify support class and fw handling"

This reverts commit d59e8c3f62.

We need to refactor the Huami classes too, otherwise this needs a lot of
hacks to work properly.

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/Huami2021Coordinator.java

@@ -28,19 +28,16 @@ import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 import java.util.Locale;
-import java.util.Map;
-import java.util.Set;
 
-import de.greenrobot.dao.query.QueryBuilder;
-import nodomain.freeyourgadget.gadgetbridge.GBException;
 import nodomain.freeyourgadget.gadgetbridge.R;
 import nodomain.freeyourgadget.gadgetbridge.activities.appmanager.AppManagerActivity;
 import nodomain.freeyourgadget.gadgetbridge.activities.devicesettings.DeviceSpecificSettingsCustomizer;
 import nodomain.freeyourgadget.gadgetbridge.capabilities.HeartRateCapability;
 import nodomain.freeyourgadget.gadgetbridge.capabilities.password.PasswordCapabilityImpl;
+import de.greenrobot.dao.query.QueryBuilder;
+import nodomain.freeyourgadget.gadgetbridge.GBException;
 import nodomain.freeyourgadget.gadgetbridge.devices.InstallHandler;
 import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.zeppos.ZeppOsAgpsInstallHandler;
@@ -51,19 +48,21 @@ import nodomain.freeyourgadget.gadgetbridge.entities.Device;
 import nodomain.freeyourgadget.gadgetbridge.entities.HuamiExtendedActivitySampleDao;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.model.ActivitySummaryParser;
-import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FWInstallHandler;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
-import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiLanguageType;
-import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiVibrationPatternNotificationType;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsAlexaService;
-import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsConfigService;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsContactsService;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsLogsService;
-import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsPhoneService;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsShortcutCardsService;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsConfigService;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiLanguageType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiVibrationPatternNotificationType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsPhoneService;
 import nodomain.freeyourgadget.gadgetbridge.util.FileUtils;
 import nodomain.freeyourgadget.gadgetbridge.util.Prefs;
 
 public abstract class Huami2021Coordinator extends HuamiCoordinator {
+    public abstract AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context);
+
     @Override
     public InstallHandler findInstallHandler(final Uri uri, final Context context) {
         if (supportsAgpsUpdates()) {
@@ -80,15 +79,7 @@ public abstract class Huami2021Coordinator extends HuamiCoordinator {
             }
         }
 
-        final Huami2021FWInstallHandler handler = new Huami2021FWInstallHandler(
+        final AbstractHuami2021FWInstallHandler handler = createFwInstallHandler(uri, context);
-                uri,
-                context,
-                deviceName(),
-                deviceSources(),
-                getDeviceType(),
-                getFirmwareCrcMap()
-        );
-
         return handler.isValid() ? handler : null;
     }
 
@@ -454,21 +445,6 @@ public abstract class Huami2021Coordinator extends HuamiCoordinator {
         return BONDING_STYLE_REQUIRE_KEY;
     }
 
-    /**
-     * The device name, to search on firmware.bin in order to determine compatibility.
-     */
-    public abstract String deviceName();
-
-    /**
-     * The device sources, to match compatible packages.
-     * As per: https://docs.zepp.com/docs/reference/related-resources/device-list/
-     */
-    public abstract Set<Integer> deviceSources();
-
-    public Map<Integer, String> getFirmwareCrcMap() {
-        return Collections.emptyMap();
-    }
-
     public boolean supportsContinuousFindDevice() {
         // TODO: Auto-detect continuous find device?
         return false;

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/Huami2021FWHelper.java

@@ -1,69 +0,0 @@
-/*  Copyright (C) 2016-2021 Andreas Shimokawa, Carsten Pfeiffer, Daniele
-    Gobbetti
-
-    This file is part of Gadgetbridge.
-
-    Gadgetbridge is free software: you can redistribute it and/or modify
-    it under the terms of the GNU Affero General Public License as published
-    by the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    Gadgetbridge is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Affero General Public License for more details.
-
-    You should have received a copy of the GNU Affero General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
-package nodomain.freeyourgadget.gadgetbridge.devices.huami;
-
-import android.content.Context;
-import android.net.Uri;
-
-import java.io.IOException;
-import java.util.Map;
-import java.util.Set;
-
-import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
-import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
-import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiFirmwareType;
-
-public class Huami2021FWHelper extends HuamiFWHelper {
-    private final String deviceName;
-    private final Set<Integer> deviceSources;
-    private final DeviceType deviceType;
-    private final Map<Integer, String> crcMap;
-
-    public Huami2021FWHelper(final Uri uri,
-                             final Context context,
-                             final String deviceName,
-                             final Set<Integer> deviceSources,
-                             final DeviceType deviceType,
-                             final Map<Integer, String> crcMap) throws IOException {
-        super(uri, context);
-        this.deviceName = deviceName;
-        this.deviceSources = deviceSources;
-        this.deviceType = deviceType;
-        this.crcMap = crcMap;
-    }
-
-    @Override
-    public Huami2021FirmwareInfo getFirmwareInfo() {
-        return (Huami2021FirmwareInfo) firmwareInfo;
-    }
-
-    /**
-     * The maximum expected file size, in bytes. Files larger than this are assumed to be invalid.
-     */
-    public long getMaxExpectedFileSize() {
-        return 1024 * 1024 * 128; // 128.0MB
-    }
-
-    @Override
-    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
-        firmwareInfo = new Huami2021FirmwareInfo(wholeFirmwareBytes, deviceName, deviceSources, deviceType, crcMap);
-        if (firmwareInfo.getFirmwareType() == HuamiFirmwareType.INVALID) {
-            throw new IllegalArgumentException("Not a " + deviceName + " firmware");
-        }
-    }
-}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitband7/AmazfitBand7Coordinator.java

@@ -17,23 +17,20 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitband7;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.net.Uri;
 
 import androidx.annotation.NonNull;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
 
 public class AmazfitBand7Coordinator extends Huami2021Coordinator {
     private static final Logger LOG = LoggerFactory.getLogger(AmazfitBand7Coordinator.class);
@@ -60,13 +57,8 @@ public class AmazfitBand7Coordinator extends Huami2021Coordinator {
     }
 
     @Override
-    public String deviceName() {
+    public AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context) {
-        return HuamiConst.AMAZFIT_BAND7_NAME;
+        return new AmazfitBand7FWInstallHandler(uri, context);
-    }
-
-    @Override
-    public Set<Integer> deviceSources() {
-        return new HashSet<>(Arrays.asList(252, 253, 254));
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitband7/AmazfitBand7FWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitband7;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitband7.AmazfitBand7FirmwareInfo;
+
+public class AmazfitBand7FWHelper extends HuamiFWHelper {
+    public AmazfitBand7FWHelper(final Uri uri, final Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @Override
+    public long getMaxExpectedFileSize() {
+        return 1024 * 1024 * 32; // 32.0MB
+    }
+
+    @Override
+    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
+        firmwareInfo = new AmazfitBand7FirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not an Amazfit Band 7 firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitband7/AmazfitBand7FWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitband7;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
+
+class AmazfitBand7FWInstallHandler extends AbstractHuami2021FWInstallHandler {
+    AmazfitBand7FWInstallHandler(final Uri uri, final Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_amazfit_band7, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitBand7FWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(final GBDevice device) {
+        return device.getType() == DeviceType.AMAZFITBAND7;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr3/AmazfitGTR3Coordinator.java

@@ -17,21 +17,20 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr3;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.net.Uri;
 
 import androidx.annotation.NonNull;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Set;
-
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
 
 public class AmazfitGTR3Coordinator extends Huami2021Coordinator {
     private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTR3Coordinator.class);
@@ -58,13 +57,8 @@ public class AmazfitGTR3Coordinator extends Huami2021Coordinator {
     }
 
     @Override
-    public String deviceName() {
+    public AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context) {
-        return HuamiConst.AMAZFIT_GTR3_NAME;
+        return new AmazfitGTR3FWInstallHandler(uri, context);
-    }
-
-    @Override
-    public Set<Integer> deviceSources() {
-        return new HashSet<>(Arrays.asList(226, 227));
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr3/AmazfitGTR3FWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr3;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr3.AmazfitGTR3FirmwareInfo;
+
+public class AmazfitGTR3FWHelper extends HuamiFWHelper {
+    public AmazfitGTR3FWHelper(final Uri uri, final Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @Override
+    public long getMaxExpectedFileSize() {
+        return 1024 * 1024 * 128; // 128.0MB
+    }
+
+    @Override
+    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
+        firmwareInfo = new AmazfitGTR3FirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not a Amazfit GTR 3 firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr3/AmazfitGTR3FWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr3;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
+
+class AmazfitGTR3FWInstallHandler extends AbstractHuami2021FWInstallHandler {
+    AmazfitGTR3FWInstallHandler(Uri uri, Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_amazfit_gtr3, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(Uri uri, Context context) throws IOException {
+        return new AmazfitGTR3FWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(GBDevice device) {
+        return device.getType() == DeviceType.AMAZFITGTR3;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr3pro/AmazfitGTR3ProCoordinator.java

@@ -17,21 +17,20 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr3pro;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.net.Uri;
 
 import androidx.annotation.NonNull;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Set;
-
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
 
 public class AmazfitGTR3ProCoordinator extends Huami2021Coordinator {
     private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTR3ProCoordinator.class);
@@ -58,13 +57,8 @@ public class AmazfitGTR3ProCoordinator extends Huami2021Coordinator {
     }
 
     @Override
-    public String deviceName() {
+    public AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context) {
-        return HuamiConst.AMAZFIT_GTR3_PRO_NAME;
+        return new AmazfitGTR3ProFWInstallHandler(uri, context);
-    }
-
-    @Override
-    public Set<Integer> deviceSources() {
-        return new HashSet<>(Arrays.asList(229, 230, 6095106));
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr3pro/AmazfitGTR3ProFWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2023 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr3pro;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr3pro.AmazfitGTR3ProFirmwareInfo;
+
+public class AmazfitGTR3ProFWHelper extends HuamiFWHelper {
+    public AmazfitGTR3ProFWHelper(final Uri uri, final Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @Override
+    public long getMaxExpectedFileSize() {
+        return 1024 * 1024 * 128; // 128.0MB
+    }
+
+    @Override
+    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
+        firmwareInfo = new AmazfitGTR3ProFirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not a Amazfit GTR 3 Pro firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr3pro/AmazfitGTR3ProFWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr3pro;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
+
+class AmazfitGTR3ProFWInstallHandler extends AbstractHuami2021FWInstallHandler {
+    AmazfitGTR3ProFWInstallHandler(Uri uri, Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_amazfit_gtr3_pro, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(Uri uri, Context context) throws IOException {
+        return new AmazfitGTR3ProFWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(GBDevice device) {
+        return device.getType() == DeviceType.AMAZFITGTR3PRO;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr4/AmazfitGTR4Coordinator.java

@@ -17,23 +17,20 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr4;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.net.Uri;
 
 import androidx.annotation.NonNull;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
 
 public class AmazfitGTR4Coordinator extends Huami2021Coordinator {
     private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTR4Coordinator.class);
@@ -60,22 +57,8 @@ public class AmazfitGTR4Coordinator extends Huami2021Coordinator {
     }
 
     @Override
-    public String deviceName() {
+    public AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context) {
-        return HuamiConst.AMAZFIT_GTR4_NAME;
+        return new AmazfitGTR4FWInstallHandler(uri, context);
-    }
-
-    @Override
-    public Set<Integer> deviceSources() {
-        return new HashSet<>(Arrays.asList(7930112, 7930113));
-    }
-
-    @Override
-    public Map<Integer, String> getFirmwareCrcMap() {
-        return new HashMap<Integer, String>() {{
-            // firmware
-            put(1699, "3.17.0.2");
-            put(20712, "3.18.1.1 (diff from 3.17.0.2)");
-        }};
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr4/AmazfitGTR4FWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr4;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr4.AmazfitGTR4FirmwareInfo;
+
+public class AmazfitGTR4FWHelper extends HuamiFWHelper {
+    public AmazfitGTR4FWHelper(final Uri uri, final Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @Override
+    public long getMaxExpectedFileSize() {
+        return 1024 * 1024 * 128; // 128.0MB
+    }
+
+    @Override
+    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
+        firmwareInfo = new AmazfitGTR4FirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not a Amazfit GTR 4 firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgtr4/AmazfitGTR4FWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr4;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
+
+class AmazfitGTR4FWInstallHandler extends AbstractHuami2021FWInstallHandler {
+    AmazfitGTR4FWInstallHandler(final Uri uri, final Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_amazfit_gtr4, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitGTR4FWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(final GBDevice device) {
+        return device.getType() == DeviceType.AMAZFITGTR4;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgts3/AmazfitGTS3Coordinator.java

@@ -17,21 +17,20 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts3;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.net.Uri;
 
 import androidx.annotation.NonNull;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Set;
-
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
 
 public class AmazfitGTS3Coordinator extends Huami2021Coordinator {
     private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTS3Coordinator.class);
@@ -58,13 +57,8 @@ public class AmazfitGTS3Coordinator extends Huami2021Coordinator {
     }
 
     @Override
-    public String deviceName() {
+    public AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context) {
-        return HuamiConst.AMAZFIT_GTS3_NAME;
+        return new AmazfitGTS3FWInstallHandler(uri, context);
-    }
-
-    @Override
-    public Set<Integer> deviceSources() {
-        return new HashSet<>(Arrays.asList(224, 225));
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgts3/AmazfitGTS3FWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts3;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts3.AmazfitGTS3FirmwareInfo;
+
+public class AmazfitGTS3FWHelper extends HuamiFWHelper {
+    public AmazfitGTS3FWHelper(final Uri uri, final Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @Override
+    public long getMaxExpectedFileSize() {
+        return 1024 * 1024 * 128; // 128.0MB
+    }
+
+    @Override
+    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
+        firmwareInfo = new AmazfitGTS3FirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not a Amazfit GTS 3 firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgts3/AmazfitGTS3FWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts3;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
+
+class AmazfitGTS3FWInstallHandler extends AbstractHuami2021FWInstallHandler {
+    AmazfitGTS3FWInstallHandler(Uri uri, Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_amazfit_gts3, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(Uri uri, Context context) throws IOException {
+        return new AmazfitGTS3FWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(GBDevice device) {
+        return device.getType() == DeviceType.AMAZFITGTS3;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgts4/AmazfitGTS4Coordinator.java

@@ -17,21 +17,20 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts4;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.net.Uri;
 
 import androidx.annotation.NonNull;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Set;
-
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
 
 public class AmazfitGTS4Coordinator extends Huami2021Coordinator {
     private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTS4Coordinator.class);
@@ -58,13 +57,8 @@ public class AmazfitGTS4Coordinator extends Huami2021Coordinator {
     }
 
     @Override
-    public String deviceName() {
+    public AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context) {
-        return HuamiConst.AMAZFIT_GTS4_NAME;
+        return new AmazfitGTS4FWInstallHandler(uri, context);
-    }
-
-    @Override
-    public Set<Integer> deviceSources() {
-        return new HashSet<>(Arrays.asList(7995648, 7995649));
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgts4/AmazfitGTS4FWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts4;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts4.AmazfitGTS4FirmwareInfo;
+
+public class AmazfitGTS4FWHelper extends HuamiFWHelper {
+    public AmazfitGTS4FWHelper(final Uri uri, final Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @Override
+    public long getMaxExpectedFileSize() {
+        return 1024 * 1024 * 128; // 128.0MB
+    }
+
+    @Override
+    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
+        firmwareInfo = new AmazfitGTS4FirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not a Amazfit GTS 4 firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgts4/AmazfitGTS4FWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts4;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
+
+class AmazfitGTS4FWInstallHandler extends AbstractHuami2021FWInstallHandler {
+    AmazfitGTS4FWInstallHandler(final Uri uri, final Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_amazfit_gts4, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitGTS4FWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(final GBDevice device) {
+        return device.getType() == DeviceType.AMAZFITGTS4;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgts4mini/AmazfitGTS4MiniCoordinator.java

@@ -17,21 +17,20 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts4mini;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.net.Uri;
 
 import androidx.annotation.NonNull;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Set;
-
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
 
 public class AmazfitGTS4MiniCoordinator extends Huami2021Coordinator {
     private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTS4MiniCoordinator.class);
@@ -58,13 +57,8 @@ public class AmazfitGTS4MiniCoordinator extends Huami2021Coordinator {
     }
 
     @Override
-    public String deviceName() {
+    public AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context) {
-        return HuamiConst.AMAZFIT_GTS4_MINI_NAME;
+        return new AmazfitGTS4MiniFWInstallHandler(uri, context);
-    }
-
-    @Override
-    public Set<Integer> deviceSources() {
-        return new HashSet<>(Arrays.asList(246, 247));
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgts4mini/AmazfitGTS4MiniFWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts4mini;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts4mini.AmazfitGTS4MiniFirmwareInfo;
+
+public class AmazfitGTS4MiniFWHelper extends HuamiFWHelper {
+    public AmazfitGTS4MiniFWHelper(final Uri uri, final Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @Override
+    public long getMaxExpectedFileSize() {
+        return 1024 * 1024 * 128; // 128.0MB
+    }
+
+    @Override
+    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
+        firmwareInfo = new AmazfitGTS4MiniFirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not a Amazfit GTS 4 Mini firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfitgts4mini/AmazfitGTS4MiniFWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts4mini;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
+
+class AmazfitGTS4MiniFWInstallHandler extends AbstractHuami2021FWInstallHandler {
+    AmazfitGTS4MiniFWInstallHandler(final Uri uri, final Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_amazfit_gts4_mini, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitGTS4MiniFWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(final GBDevice device) {
+        return device.getType() == DeviceType.AMAZFITGTS4MINI;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfittrex2/AmazfitTRex2Coordinator.java

@@ -17,21 +17,20 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfittrex2;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.net.Uri;
 
 import androidx.annotation.NonNull;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Set;
-
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
 
 public class AmazfitTRex2Coordinator extends Huami2021Coordinator {
     private static final Logger LOG = LoggerFactory.getLogger(AmazfitTRex2Coordinator.class);
@@ -58,13 +57,8 @@ public class AmazfitTRex2Coordinator extends Huami2021Coordinator {
     }
 
     @Override
-    public String deviceName() {
+    public AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context) {
-        return HuamiConst.AMAZFIT_TREX_2_NAME;
+        return new AmazfitTRex2FWInstallHandler(uri, context);
-    }
-
-    @Override
-    public Set<Integer> deviceSources() {
-        return new HashSet<>(Arrays.asList(418, 419));
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfittrex2/AmazfitTRex2FWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfittrex2;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfittrex2.AmazfitTRex2FirmwareInfo;
+
+public class AmazfitTRex2FWHelper extends HuamiFWHelper {
+    public AmazfitTRex2FWHelper(final Uri uri, final Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @Override
+    public long getMaxExpectedFileSize() {
+        return 1024 * 1024 * 128; // 128.0MB
+    }
+
+    @Override
+    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
+        firmwareInfo = new AmazfitTRex2FirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not a Amazfit T-Rex 2 firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/amazfittrex2/AmazfitTRex2FWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfittrex2;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
+
+class AmazfitTRex2FWInstallHandler extends AbstractHuami2021FWInstallHandler {
+    AmazfitTRex2FWInstallHandler(final Uri uri, final Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_amazfit_trex2, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitTRex2FWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(final GBDevice device) {
+        return device.getType() == DeviceType.AMAZFITTREX2;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband7/MiBand7Coordinator.java

@@ -17,23 +17,20 @@
 package nodomain.freeyourgadget.gadgetbridge.devices.huami.miband7;
 
 import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.net.Uri;
 
 import androidx.annotation.NonNull;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
 
 public class MiBand7Coordinator extends Huami2021Coordinator {
     private static final Logger LOG = LoggerFactory.getLogger(MiBand7Coordinator.class);
@@ -60,23 +57,8 @@ public class MiBand7Coordinator extends Huami2021Coordinator {
     }
 
     @Override
-    public String deviceName() {
+    public AbstractHuami2021FWInstallHandler createFwInstallHandler(final Uri uri, final Context context) {
-        return HuamiConst.XIAOMI_SMART_BAND7_NAME;
+        return new MiBand7FWInstallHandler(uri, context);
-    }
-
-    @Override
-    public Set<Integer> deviceSources() {
-        return new HashSet<>(Arrays.asList(260, 262, 263, 264, 265));
-    }
-
-    @Override
-    public Map<Integer, String> getFirmwareCrcMap() {
-        return new HashMap<Integer, String>() {{
-            // firmware
-            put(26036, "1.20.3.1");
-            put(55449, "1.27.0.4");
-            put(14502, "2.0.0.2");
-        }};
     }
 
     @Override

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband7/MiBand7FWHelper.java

@@ -0,0 +1,44 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.miband7;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.miband7.MiBand7FirmwareInfo;
+
+public class MiBand7FWHelper extends HuamiFWHelper {
+    public MiBand7FWHelper(final Uri uri, final Context context) throws IOException {
+        super(uri, context);
+    }
+
+    @Override
+    public long getMaxExpectedFileSize() {
+        return 1024 * 1024 * 32; // 32.0MB
+    }
+
+    @Override
+    protected void determineFirmwareInfo(final byte[] wholeFirmwareBytes) {
+        firmwareInfo = new MiBand7FirmwareInfo(wholeFirmwareBytes);
+        if (!firmwareInfo.isHeaderValid()) {
+            throw new IllegalArgumentException("Not a Xiaomi Smart Band 7 firmware");
+        }
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/miband7/MiBand7FWInstallHandler.java

@@ -0,0 +1,49 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.devices.huami.miband7;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuami2021FWInstallHandler;
+
+class MiBand7FWInstallHandler extends AbstractHuami2021FWInstallHandler {
+    MiBand7FWInstallHandler(Uri uri, Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    protected String getFwUpgradeNotice() {
+        return mContext.getString(R.string.fw_upgrade_notice_miband7, helper.getHumanFirmwareVersion());
+    }
+
+    @Override
+    protected AbstractMiBandFWHelper createHelper(Uri uri, Context context) throws IOException {
+        return new MiBand7FWHelper(uri, context);
+    }
+
+    @Override
+    protected boolean isSupportedDeviceType(GBDevice device) {
+        return device.getType() == DeviceType.MIBAND7;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceSupportFactory.java

@@ -43,8 +43,9 @@ import nodomain.freeyourgadget.gadgetbridge.service.devices.domyos.DomyosT540Sup
 import nodomain.freeyourgadget.gadgetbridge.service.devices.flipper.zero.support.FlipperZeroSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.galaxy_buds.GalaxyBudsDeviceSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.hplus.HPlusSupport;
-import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitband5.AmazfitBand5Support;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitband7.AmazfitBand7Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitbip.AmazfitBipLiteSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitbip.AmazfitBipSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitbips.AmazfitBipSLiteSupport;
@@ -57,14 +58,21 @@ import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr.Ama
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr.AmazfitGTRSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr2.AmazfitGTR2Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr2.AmazfitGTR2eSupport;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr3.AmazfitGTR3Support;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr3pro.AmazfitGTR3ProSupport;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr4.AmazfitGTR4Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts.AmazfitGTSSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts2.AmazfitGTS2MiniSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts2.AmazfitGTS2Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts2.AmazfitGTS2eSupport;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts3.AmazfitGTS3Support;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts4.AmazfitGTS4Support;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts4mini.AmazfitGTS4MiniSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitneo.AmazfitNeoSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitpop.AmazfitPopSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitpoppro.AmazfitPopProSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfittrex.AmazfitTRexSupport;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfittrex2.AmazfitTRex2Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfittrexpro.AmazfitTRexProSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitvergel.AmazfitVergeLSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitx.AmazfitXSupport;
@@ -73,6 +81,7 @@ import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.miband3.MiBand
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.miband4.MiBand4Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.miband5.MiBand5Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.miband6.MiBand6Support;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.miband7.MiBand7Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppe.ZeppESupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.id115.ID115Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.itag.ITagSupport;
@@ -184,23 +193,23 @@ public class DeviceSupportFactory {
             case MIBAND6:
                 return new ServiceDeviceSupport(new MiBand6Support());
             case AMAZFITGTS3:
-                return new ServiceDeviceSupport(new Huami2021Support());
+                return new ServiceDeviceSupport(new AmazfitGTS3Support());
             case AMAZFITGTR3:
-                return new ServiceDeviceSupport(new Huami2021Support());
+                return new ServiceDeviceSupport(new AmazfitGTR3Support());
             case AMAZFITGTR4:
-                return new ServiceDeviceSupport(new Huami2021Support());
+                return new ServiceDeviceSupport(new AmazfitGTR4Support());
             case MIBAND7:
-                return new ServiceDeviceSupport(new Huami2021Support());
+                return new ServiceDeviceSupport(new MiBand7Support());
             case AMAZFITBAND7:
-                return new ServiceDeviceSupport(new Huami2021Support());
+                return new ServiceDeviceSupport(new AmazfitBand7Support());
             case AMAZFITGTS4:
-                return new ServiceDeviceSupport(new Huami2021Support());
+                return new ServiceDeviceSupport(new AmazfitGTS4Support());
             case AMAZFITGTS4MINI:
-                return new ServiceDeviceSupport(new Huami2021Support());
+                return new ServiceDeviceSupport(new AmazfitGTS4MiniSupport());
             case AMAZFITTREX2:
-                return new ServiceDeviceSupport(new Huami2021Support());
+                return new ServiceDeviceSupport(new AmazfitTRex2Support());
             case AMAZFITGTR3PRO:
-                return new ServiceDeviceSupport(new Huami2021Support());
+                return new ServiceDeviceSupport(new AmazfitGTR3ProSupport());
             case AMAZFITBIP:
                 return new ServiceDeviceSupport(new AmazfitBipSupport());
             case AMAZFITBIP_LITE:

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/AbstractHuami2021FWInstallHandler.java

@@ -0,0 +1,37 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami;
+
+import android.content.Context;
+import android.net.Uri;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWInstallHandler;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+
+public abstract class AbstractHuami2021FWInstallHandler extends AbstractMiBandFWInstallHandler {
+    public AbstractHuami2021FWInstallHandler(final Uri uri, final Context context) {
+        super(uri, context);
+    }
+
+    @Override
+    public void onStartInstall(GBDevice device) {
+        // Unset the firmware bytes
+        // Huami2021 firmwares are large (> 130MB). With the current architecture, the update operation
+        // will re-read them to memory, and we run out-of-memory.
+        helper.unsetFwBytes();
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/Huami2021FWInstallHandler.java

@@ -1,88 +0,0 @@
-/*  Copyright (C) 2022 José Rebelo
-
-    This file is part of Gadgetbridge.
-
-    Gadgetbridge is free software: you can redistribute it and/or modify
-    it under the terms of the GNU Affero General Public License as published
-    by the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    Gadgetbridge is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Affero General Public License for more details.
-
-    You should have received a copy of the GNU Affero General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
-package nodomain.freeyourgadget.gadgetbridge.service.devices.huami;
-
-import android.content.Context;
-import android.net.Uri;
-
-import java.io.IOException;
-import java.util.Map;
-import java.util.Set;
-
-import nodomain.freeyourgadget.gadgetbridge.R;
-import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021FWHelper;
-import nodomain.freeyourgadget.gadgetbridge.devices.miband.AbstractMiBandFWInstallHandler;
-import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
-import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
-
-public class Huami2021FWInstallHandler extends AbstractMiBandFWInstallHandler {
-    private final String deviceName;
-    private final Set<Integer> deviceSources;
-    private final DeviceType deviceType;
-    private final Map<Integer, String> crcMap;
-
-    public Huami2021FWInstallHandler(final Uri uri,
-                                     final Context context,
-                                     final String deviceName,
-                                     final Set<Integer> deviceSources,
-                                     final DeviceType deviceType,
-                                     final Map<Integer, String> crcMap) {
-        super(uri, context);
-        this.deviceName = deviceName;
-        this.deviceSources = deviceSources;
-        this.deviceType = deviceType;
-        this.crcMap = crcMap;
-    }
-
-    @Override
-    public Huami2021FWHelper getHelper() {
-        return (Huami2021FWHelper) helper;
-    }
-
-    protected boolean isSupportedDeviceType(final GBDevice device) {
-        return device.getType() == deviceType;
-    }
-
-    @Override
-    protected String getFwUpgradeNotice() {
-        return mContext.getString(
-                R.string.fw_upgrade_notice_zip,
-                helper.getHumanFirmwareVersion(),
-                mContext.getString(deviceType.getName())
-        );
-    }
-
-    @Override
-    protected Huami2021FWHelper createHelper(final Uri uri, final Context context) throws IOException {
-        return new Huami2021FWHelper(
-                uri,
-                context,
-                deviceName,
-                deviceSources,
-                deviceType,
-                crcMap
-        );
-    }
-
-    @Override
-    public void onStartInstall(final GBDevice device) {
-        // Unset the firmware bytes
-        // Huami2021 firmwares are large (> 130MB). With the current architecture, the update operation
-        // will re-read them to memory, and we run out-of-memory.
-        helper.unsetFwBytes();
-    }
-}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/Huami2021FirmwareInfo.java

@@ -23,21 +23,20 @@ import android.graphics.BitmapFactory;
 import androidx.annotation.Nullable;
 
 import org.json.JSONArray;
+import org.json.JSONException;
 import org.json.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.io.File;
 import java.io.IOException;
 import java.lang.reflect.Constructor;
 import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
-import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
 
-import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceApp;
-import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
 import nodomain.freeyourgadget.gadgetbridge.service.btle.BLETypeConversions;
 import nodomain.freeyourgadget.gadgetbridge.util.ArrayUtils;
 import nodomain.freeyourgadget.gadgetbridge.util.BitmapUtil;
@@ -45,39 +44,27 @@ import nodomain.freeyourgadget.gadgetbridge.util.ZipFile;
 import nodomain.freeyourgadget.gadgetbridge.util.ZipFileException;
 
 
-public class Huami2021FirmwareInfo extends AbstractHuamiFirmwareInfo {
+public abstract class Huami2021FirmwareInfo extends AbstractHuamiFirmwareInfo {
     private static final Logger LOG = LoggerFactory.getLogger(Huami2021FirmwareInfo.class);
 
-    private final String deviceName;
-    private final Set<Integer> deviceSources;
-    private final DeviceType deviceType;
-    private final Map<Integer, String> crcMap;
-
     private final String preComputedVersion;
     private GBDeviceApp gbDeviceApp;
 
-    public Huami2021FirmwareInfo(final byte[] bytes,
+    public Huami2021FirmwareInfo(final byte[] bytes) {
-                                 final String deviceName,
-                                 final Set<Integer> deviceSources,
-                                 final DeviceType deviceType,
-                                 final Map<Integer, String> crcMap) {
         super(bytes);
-        this.deviceName = deviceName;
-        this.deviceSources = deviceSources;
-        this.deviceType = deviceType;
-        this.crcMap = crcMap;
         this.preComputedVersion = preComputeVersion();
     }
 
-    @Override
+    /**
-    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+     * The device name, to search on firmware.bin in order to determine compatibility.
-        return device.getType() == deviceType;
+     */
-    }
+    public abstract String deviceName();
 
-    @Override
+    /**
-    protected Map<Integer, String> getCrcMap() {
+     * The device sources, to match compatible packages.
-        return crcMap;
+     * As per: https://docs.zepp.com/docs/reference/related-resources/device-list/
-    }
+     */
+    public abstract Set<Integer> deviceSources();
 
     @Override
     protected HuamiFirmwareType determineFirmwareType(final byte[] bytes) {
@@ -250,7 +237,7 @@ public class Huami2021FirmwareInfo extends AbstractHuamiFirmwareInfo {
                 for (int j = 0; j < platforms.length(); j++) {
                     final JSONObject platform = platforms.getJSONObject(j);
 
-                    if (deviceSources.contains(platform.getInt("deviceSource"))) {
+                    if (deviceSources().contains(platform.getInt("deviceSource"))) {
                         // It's compatible with the device, fetch device.zip
                         final String name = zpkEntry.getString("name");
                         final byte[] zpkBytes = zipFile.getFileFromZip(name);
@@ -367,8 +354,8 @@ public class Huami2021FirmwareInfo extends AbstractHuamiFirmwareInfo {
             return false;
         }
 
-        if (!searchString(firmwareBin, deviceName)) {
+        if (!searchString(firmwareBin, deviceName())) {
-            LOG.warn("Failed to find {} in fwBytes", deviceName);
+            LOG.warn("Failed to find {} in fwBytes", deviceName());
             return false;
         }
 

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/Huami2021Support.java

@@ -38,7 +38,6 @@ import static nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.
 import static nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsConfigService.ConfigArg.TEMPERATURE_UNIT;
 import static nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services.ZeppOsConfigService.ConfigArg.TIME_FORMAT;
 
-import android.content.Context;
 import android.location.Location;
 import android.net.Uri;
 import android.os.Handler;
@@ -81,7 +80,6 @@ import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventScreenshot
 import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventUpdatePreferences;
 import nodomain.freeyourgadget.gadgetbridge.devices.DeviceCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Coordinator;
-import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021FWHelper;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021Service;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiCoordinator;
@@ -137,7 +135,7 @@ import nodomain.freeyourgadget.gadgetbridge.util.MapUtils;
 import nodomain.freeyourgadget.gadgetbridge.util.Prefs;
 import nodomain.freeyourgadget.gadgetbridge.util.StringUtils;
 
-public class Huami2021Support extends HuamiSupport implements ZeppOsFileTransferService.Callback {
+public abstract class Huami2021Support extends HuamiSupport implements ZeppOsFileTransferService.Callback {
     private static final Logger LOG = LoggerFactory.getLogger(Huami2021Support.class);
 
     // Tracks whether realtime HR monitoring is already started, so we can just
@@ -1206,19 +1204,6 @@ public class Huami2021Support extends HuamiSupport implements ZeppOsFileTransfer
         }
     }
 
-    @Override
-    public Huami2021FWHelper createFWHelper(final Uri uri, final Context context) throws IOException {
-        final Huami2021Coordinator coordinator = getCoordinator();
-        return new Huami2021FWHelper(
-                uri,
-                context,
-                coordinator.deviceName(),
-                coordinator.deviceSources(),
-                coordinator.getDeviceType(),
-                coordinator.getFirmwareCrcMap()
-        );
-    }
-
     @Override
     public UpdateFirmwareOperation createUpdateFirmwareOperation(final Uri uri) {
         return new UpdateFirmwareOperation2021(uri, this);

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitband7/AmazfitBand7FirmwareInfo.java

@@ -0,0 +1,57 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitband7;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+
+public class AmazfitBand7FirmwareInfo extends Huami2021FirmwareInfo {
+    private static final Map<Integer, String> crcToVersion = new HashMap<Integer, String>() {{
+    }};
+
+    public AmazfitBand7FirmwareInfo(final byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    public String deviceName() {
+        return HuamiConst.AMAZFIT_BAND7_NAME;
+    }
+
+    @Override
+    public Set<Integer> deviceSources() {
+        return new HashSet<>(Arrays.asList(252, 253, 254));
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.AMAZFITBAND7;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitband7/AmazfitBand7Support.java

@@ -0,0 +1,33 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitband7;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitband7.AmazfitBand7FWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+
+public class AmazfitBand7Support extends Huami2021Support {
+    @Override
+    public HuamiFWHelper createFWHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitBand7FWHelper(uri, context);
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgtr3/AmazfitGTR3FirmwareInfo.java

@@ -0,0 +1,63 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr3;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+
+public class AmazfitGTR3FirmwareInfo extends Huami2021FirmwareInfo {
+    private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTR3FirmwareInfo.class);
+
+    private static final Map<Integer, String> crcToVersion = new HashMap<Integer, String>() {{
+        // firmware
+    }};
+
+    public AmazfitGTR3FirmwareInfo(final byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    public String deviceName() {
+        return HuamiConst.AMAZFIT_GTR3_NAME;
+    }
+
+    @Override
+    public Set<Integer> deviceSources() {
+        return new HashSet<>(Arrays.asList(226, 227));
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.AMAZFITGTR3;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgtr3/AmazfitGTR3Support.java

@@ -0,0 +1,38 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr3;
+
+import android.content.Context;
+import android.net.Uri;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr3.AmazfitGTR3FWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+
+public class AmazfitGTR3Support extends Huami2021Support {
+    private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTR3Support.class);
+
+    @Override
+    public HuamiFWHelper createFWHelper(Uri uri, Context context) throws IOException {
+        return new AmazfitGTR3FWHelper(uri, context);
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgtr3pro/AmazfitGTR3ProFirmwareInfo.java

@@ -0,0 +1,63 @@
+/*  Copyright (C) 2023 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr3pro;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+
+public class AmazfitGTR3ProFirmwareInfo extends Huami2021FirmwareInfo {
+    private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTR3ProFirmwareInfo.class);
+
+    private static final Map<Integer, String> crcToVersion = new HashMap<Integer, String>() {{
+        // firmware
+    }};
+
+    public AmazfitGTR3ProFirmwareInfo(final byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    public String deviceName() {
+        return HuamiConst.AMAZFIT_GTR3_PRO_NAME;
+    }
+
+    @Override
+    public Set<Integer> deviceSources() {
+        return new HashSet<>(Arrays.asList(229, 230, 6095106));
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.AMAZFITGTR3PRO;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgtr3pro/AmazfitGTR3ProSupport.java

@@ -0,0 +1,38 @@
+/*  Copyright (C) 2023 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr3pro;
+
+import android.content.Context;
+import android.net.Uri;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr3.AmazfitGTR3FWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+
+public class AmazfitGTR3ProSupport extends Huami2021Support {
+    private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTR3ProSupport.class);
+
+    @Override
+    public HuamiFWHelper createFWHelper(Uri uri, Context context) throws IOException {
+        return new AmazfitGTR3FWHelper(uri, context);
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgtr4/AmazfitGTR4FirmwareInfo.java

@@ -0,0 +1,60 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr4;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+
+public class AmazfitGTR4FirmwareInfo extends Huami2021FirmwareInfo {
+    private static final Map<Integer, String> crcToVersion = new HashMap<Integer, String>() {{
+        // firmware
+        put(1699, "3.17.0.2");
+        put(20712, "3.18.1.1 (diff from 3.17.0.2)");
+    }};
+
+    public AmazfitGTR4FirmwareInfo(final byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    public String deviceName() {
+        return HuamiConst.AMAZFIT_GTR4_NAME;
+    }
+
+    @Override
+    public Set<Integer> deviceSources() {
+        return new HashSet<>(Arrays.asList(7930112, 7930113));
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.AMAZFITGTR4;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgtr4/AmazfitGTR4Support.java

@@ -0,0 +1,33 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgtr4;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgtr4.AmazfitGTR4FWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+
+public class AmazfitGTR4Support extends Huami2021Support {
+    @Override
+    public HuamiFWHelper createFWHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitGTR4FWHelper(uri, context);
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgts3/AmazfitGTS3FirmwareInfo.java

@@ -0,0 +1,63 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts3;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+
+public class AmazfitGTS3FirmwareInfo extends Huami2021FirmwareInfo {
+    private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTS3FirmwareInfo.class);
+
+    private static final Map<Integer, String> crcToVersion = new HashMap<Integer, String>() {{
+        // firmware
+    }};
+
+    public AmazfitGTS3FirmwareInfo(final byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    public String deviceName() {
+        return HuamiConst.AMAZFIT_GTS3_NAME;
+    }
+
+    @Override
+    public Set<Integer> deviceSources() {
+        return new HashSet<>(Arrays.asList(224, 225));
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.AMAZFITGTS3;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgts3/AmazfitGTS3Support.java

@@ -0,0 +1,39 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts3;
+
+import android.content.Context;
+import android.net.Uri;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts3.AmazfitGTS3FWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+
+public class AmazfitGTS3Support extends Huami2021Support {
+    private static final Logger LOG = LoggerFactory.getLogger(AmazfitGTS3Support.class);
+
+    @Override
+    public HuamiFWHelper createFWHelper(Uri uri, Context context) throws IOException {
+        return new AmazfitGTS3FWHelper(uri, context);
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgts4/AmazfitGTS4FirmwareInfo.java

@@ -0,0 +1,58 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts4;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+
+public class AmazfitGTS4FirmwareInfo extends Huami2021FirmwareInfo {
+    private static final Map<Integer, String> crcToVersion = new HashMap<Integer, String>() {{
+        // firmware
+    }};
+
+    public AmazfitGTS4FirmwareInfo(final byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    public String deviceName() {
+        return HuamiConst.AMAZFIT_GTS4_NAME;
+    }
+
+    @Override
+    public Set<Integer> deviceSources() {
+        return new HashSet<>(Arrays.asList(7995648, 7995649));
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.AMAZFITGTS4;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgts4/AmazfitGTS4Support.java

@@ -0,0 +1,33 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts4;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts4.AmazfitGTS4FWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+
+public class AmazfitGTS4Support extends Huami2021Support {
+    @Override
+    public HuamiFWHelper createFWHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitGTS4FWHelper(uri, context);
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgts4mini/AmazfitGTS4MiniFirmwareInfo.java

@@ -0,0 +1,58 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts4mini;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+
+public class AmazfitGTS4MiniFirmwareInfo extends Huami2021FirmwareInfo {
+    private static final Map<Integer, String> crcToVersion = new HashMap<Integer, String>() {{
+        // firmware
+    }};
+
+    public AmazfitGTS4MiniFirmwareInfo(final byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    public String deviceName() {
+        return HuamiConst.AMAZFIT_GTS4_MINI_NAME;
+    }
+
+    @Override
+    public Set<Integer> deviceSources() {
+        return new HashSet<>(Arrays.asList(246, 247));
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.AMAZFITGTS4MINI;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfitgts4mini/AmazfitGTS4MiniSupport.java

@@ -0,0 +1,33 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfitgts4mini;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfitgts4mini.AmazfitGTS4MiniFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+
+public class AmazfitGTS4MiniSupport extends Huami2021Support {
+    @Override
+    public HuamiFWHelper createFWHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitGTS4MiniFWHelper(uri, context);
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfittrex2/AmazfitTRex2FirmwareInfo.java

@@ -0,0 +1,58 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfittrex2;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+
+public class AmazfitTRex2FirmwareInfo extends Huami2021FirmwareInfo {
+    private static final Map<Integer, String> crcToVersion = new HashMap<Integer, String>() {{
+        // firmware
+    }};
+
+    public AmazfitTRex2FirmwareInfo(final byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    public String deviceName() {
+        return HuamiConst.AMAZFIT_TREX_2_NAME;
+    }
+
+    @Override
+    public Set<Integer> deviceSources() {
+        return new HashSet<>(Arrays.asList(418, 419));
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.AMAZFITTREX2;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/amazfittrex2/AmazfitTRex2Support.java

@@ -0,0 +1,33 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.amazfittrex2;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.amazfittrex2.AmazfitTRex2FWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+
+public class AmazfitTRex2Support extends Huami2021Support {
+    @Override
+    public HuamiFWHelper createFWHelper(final Uri uri, final Context context) throws IOException {
+        return new AmazfitTRex2FWHelper(uri, context);
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/miband7/MiBand7FirmwareInfo.java

@@ -0,0 +1,64 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.miband7;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiConst;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+
+public class MiBand7FirmwareInfo extends Huami2021FirmwareInfo {
+    private static final Map<Integer, String> crcToVersion = new HashMap<Integer, String>() {{
+        // firmware
+        put(26036, "1.20.3.1");
+        put(55449, "1.27.0.4");
+        put(14502, "2.0.0.2");
+    }};
+
+    public MiBand7FirmwareInfo(final byte[] bytes) {
+        super(bytes);
+    }
+
+    @Override
+    public String deviceName() {
+        return HuamiConst.XIAOMI_SMART_BAND7_NAME;
+    }
+
+    @Override
+    public Set<Integer> deviceSources() {
+        return new HashSet<>(Arrays.asList(260, 262, 263, 264, 265));
+    }
+
+    @Override
+    public boolean isGenerallyCompatibleWith(final GBDevice device) {
+        return isHeaderValid() && device.getType() == DeviceType.MIBAND7;
+    }
+
+    @Override
+    protected Map<Integer, String> getCrcMap() {
+        return crcToVersion;
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/miband7/MiBand7Support.java

@@ -0,0 +1,33 @@
+/*  Copyright (C) 2022 José Rebelo
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.miband7;
+
+import android.content.Context;
+import android.net.Uri;
+
+import java.io.IOException;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.miband7.MiBand7FWHelper;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+
+public class MiBand7Support extends Huami2021Support {
+    @Override
+    public HuamiFWHelper createFWHelper(final Uri uri, final Context context) throws IOException {
+        return new MiBand7FWHelper(uri, context);
+    }
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/operations/UpdateFirmwareOperation2021.java

@@ -24,12 +24,12 @@ import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
 
-import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021FWHelper;
 import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiService;
 import nodomain.freeyourgadget.gadgetbridge.service.btle.BLETypeConversions;
 import nodomain.freeyourgadget.gadgetbridge.service.btle.TransactionBuilder;
-import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021FirmwareInfo;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.AbstractHuamiFirmwareInfo;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.Huami2021Support;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiFirmwareType;
 import nodomain.freeyourgadget.gadgetbridge.util.ArrayUtils;
 
 public class UpdateFirmwareOperation2021 extends UpdateFirmwareOperation2020 {
@@ -40,9 +40,8 @@ public class UpdateFirmwareOperation2021 extends UpdateFirmwareOperation2020 {
     }
 
     @Override
-    Huami2021FirmwareInfo createFwInfo(final Uri uri, final Context context) throws IOException {
+    AbstractHuamiFirmwareInfo createFwInfo(final Uri uri, final Context context) throws IOException {
-        final Huami2021FWHelper fwHelper = getSupport().createFWHelper(uri, context);
+        return super.createFwInfo(uri, context);
-        return fwHelper.getFirmwareInfo();
 
         /*  This does not actually seem to be needed, but it's what the official app does
         final HuamiFWHelper fwHelper = getSupport().createFWHelper(uri, context);
@@ -72,7 +71,7 @@ public class UpdateFirmwareOperation2021 extends UpdateFirmwareOperation2020 {
         super.handleNotificationNotif(value);
 
         if (ArrayUtils.startsWith(value, new byte[]{HuamiService.RESPONSE, COMMAND_FINALIZE_UPDATE, HuamiService.SUCCESS})) {
-            if (getFirmwareInfo().getFirmwareType().isApp()) {
+            if (getFirmwareInfo().getFirmwareType() == HuamiFirmwareType.APP) {
                 // After an app is installed, request the display items from the band (new app will be at the end)
                 try {
                     TransactionBuilder builder = performInitialized("request display items");
@@ -81,7 +80,7 @@ public class UpdateFirmwareOperation2021 extends UpdateFirmwareOperation2020 {
                 } catch (final IOException e) {
                     LOG.error("Failed to request display items after app install", e);
                 }
-            } else if (getFirmwareInfo().getFirmwareType().isWatchface()) {
+            } else if (getFirmwareInfo().getFirmwareType() == HuamiFirmwareType.WATCHFACE) {
                 // After a watchface is installed, request the watchfaces from the band (new watchface will be at the end)
                 try {
                     TransactionBuilder builder = performInitialized("request watchfaces");
@@ -94,11 +93,6 @@ public class UpdateFirmwareOperation2021 extends UpdateFirmwareOperation2020 {
         }
     }
 
-    @Override
-    Huami2021FirmwareInfo getFirmwareInfo() {
-        return (Huami2021FirmwareInfo) firmwareInfo;
-    }
-
     @Override
     protected byte[] buildFirmwareInfoCommand() {
         final int fwSize = firmwareInfo.getSize();

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/zeppos/services/ZeppOsAlexaService.java

@@ -17,6 +17,7 @@
 package nodomain.freeyourgadget.gadgetbridge.service.devices.huami.zeppos.services;
 
 import static nodomain.freeyourgadget.gadgetbridge.activities.devicesettings.DeviceSettingsPreferenceConst.PREF_VOICE_SERVICE_LANGUAGE;
+import static nodomain.freeyourgadget.gadgetbridge.activities.devicesettings.DeviceSettingsPreferenceConst.PREF_WATCHFACE;
 
 import android.widget.Toast;
 

app/src/main/res/values/strings.xml

@@ -154,7 +154,15 @@
     <string name="fw_upgrade_notice_miband4">You are about to install the %s firmware on your Mi Band 4.\n\nPlease make sure to install the .fw file, and after that the .res file. Your band will reboot after installing the .fw file.\n\nNote: You do not have to install .res if it is exactly the same as the one previously installed.\n\nPROCEED AT YOUR OWN RISK!</string>
     <string name="fw_upgrade_notice_miband5">You are about to install the %s firmware on your Mi Band 5.\n\nPlease make sure to install the .fw file, and after that the .res file. Your band will reboot after installing the .fw file.\n\nNote: You do not have to install .res if it is exactly the same as the one previously installed.\n\nPROCEED AT YOUR OWN RISK!</string>
     <string name="fw_upgrade_notice_miband6">You are about to install the %s firmware on your Mi Band 6.\n\nPlease make sure to install the .fw file, and after that the .res file. Your band will reboot after installing the .fw file.\n\nNote: You do not have to install .res if it is exactly the same as the one previously installed.\n\nPROCEED AT YOUR OWN RISK!</string>
-    <string name="fw_upgrade_notice_zip">You are about to install the %s firmware on your %s.\n\nYour watch will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
+    <string name="fw_upgrade_notice_miband7">You are about to install the %s firmware on your Xiaomi Smart Band 7.\n\nYour band will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
+    <string name="fw_upgrade_notice_amazfit_gts3">You are about to install the %s firmware on your Amazfit GTS 3.\n\nYour band will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
+    <string name="fw_upgrade_notice_amazfit_gts4">You are about to install the %s firmware on your Amazfit GTS 4.\n\nYour band will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
+    <string name="fw_upgrade_notice_amazfit_gts4_mini">You are about to install the %s firmware on your Amazfit GTS 4 Mini.\n\nYour band will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
+    <string name="fw_upgrade_notice_amazfit_gtr3">You are about to install the %s firmware on your Amazfit GTR 3.\n\nYour band will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
+    <string name="fw_upgrade_notice_amazfit_gtr3_pro">You are about to install the %s firmware on your Amazfit GTR 3 Pro.\n\nYour band will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
+    <string name="fw_upgrade_notice_amazfit_gtr4">You are about to install the %s firmware on your Amazfit GTR 4.\n\nYour band will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
+    <string name="fw_upgrade_notice_amazfit_trex2">You are about to install the %s firmware on your Amazfit T-Rex 2.\n\nYour band will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
+    <string name="fw_upgrade_notice_amazfit_band7">You are about to install the %s firmware on your Amazfit Band 7.\n\nYour band will reboot after installing the .zip file.\n\nPROCEED AT YOUR OWN RISK!</string>
     <string name="fw_upgrade_notice_amazfitx">You are about to install the %s firmware on your Amazfit X.\n\nPlease make sure to install the .fw file, and after that the .res file. Your band will reboot after installing the .fw file.\n\nNote: You do not have to install .res if it is exactly the same as the one previously installed.\n\nPROCEED AT YOUR OWN RISK!</string>
     <string name="fw_upgrade_notice_amazfitneo">You are about to install the %s firmware on your Amazfit Neo.
 \n

app/src/test/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/Huami2021SupportTest.java

@@ -31,7 +31,7 @@ import java.util.Calendar;
 import java.util.GregorianCalendar;
 import java.util.UUID;
 
-import nodomain.freeyourgadget.gadgetbridge.devices.huami.Huami2021FWHelper;
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiFWHelper;
 import nodomain.freeyourgadget.gadgetbridge.service.btle.TransactionBuilder;
 import nodomain.freeyourgadget.gadgetbridge.service.btle.actions.WriteAction;
 
@@ -55,7 +55,7 @@ public class Huami2021SupportTest {
             }
 
             @Override
-            public Huami2021FWHelper createFWHelper(final Uri uri, final Context context) throws IOException {
+            public HuamiFWHelper createFWHelper(final Uri uri, final Context context) throws IOException {
                 return null;
             }