diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index bd42dd7d8..e9d2fc015 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -387,6 +387,12 @@
         <activity
             android:name=".devices.pebble.PebblePairingActivity"
             android:label="@string/title_activity_pebble_pairing" />
+        <activity
+            android:name=".devices.watch9.Watch9PairingActivity"
+            android:label="@string/title_activity_watch9_pairing"  />
+        <activity
+            android:name=".devices.watch9.Watch9CalibrationActivity"
+            android:label="@string/title_activity_watch9_calibration"  />
         <activity
             android:name=".activities.charts.ChartsActivity"
             android:label="@string/title_activity_charts"
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/adapter/GBDeviceAdapterv2.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/adapter/GBDeviceAdapterv2.java
index a23624049..4922cd870 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/adapter/GBDeviceAdapterv2.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/adapter/GBDeviceAdapterv2.java
@@ -50,6 +50,7 @@ import nodomain.freeyourgadget.gadgetbridge.activities.VibrationActivity;
 import nodomain.freeyourgadget.gadgetbridge.activities.charts.ChartsActivity;
 import nodomain.freeyourgadget.gadgetbridge.devices.DeviceCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.DeviceManager;
+import nodomain.freeyourgadget.gadgetbridge.devices.watch9.Watch9CalibrationActivity;
 import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
 import nodomain.freeyourgadget.gadgetbridge.model.BatteryState;
 import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
@@ -290,6 +291,16 @@ public class GBDeviceAdapterv2 extends RecyclerView.Adapter<GBDeviceAdapterv2.Vi
 
         );
 
+        holder.calibrateDevice.setVisibility(device.isInitialized() && device.getType() == DeviceType.WATCH9 ? View.VISIBLE : View.GONE);
+        holder.calibrateDevice.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent startIntent = new Intent(context, Watch9CalibrationActivity.class);
+                startIntent.putExtra(GBDevice.EXTRA_DEVICE, device);
+                context.startActivity(startIntent);
+            }
+        });
+
         //remove device, hidden under details
         holder.removeDevice.setOnClickListener(new View.OnClickListener()
 
@@ -354,6 +365,7 @@ public class GBDeviceAdapterv2 extends RecyclerView.Adapter<GBDeviceAdapterv2.Vi
         ImageView setAlarmsView;
         ImageView showActivityGraphs;
         ImageView showActivityTracks;
+        ImageView calibrateDevice;
 
         ImageView deviceInfoView;
         //overflow
@@ -383,6 +395,7 @@ public class GBDeviceAdapterv2 extends RecyclerView.Adapter<GBDeviceAdapterv2.Vi
             showActivityGraphs = view.findViewById(R.id.device_action_show_activity_graphs);
             showActivityTracks = view.findViewById(R.id.device_action_show_activity_tracks);
             deviceInfoView = view.findViewById(R.id.device_info_image);
+            calibrateDevice = view.findViewById(R.id.device_action_calibrate);
 
             deviceInfoBox = view.findViewById(R.id.device_item_infos_box);
             //overflow
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9CalibrationActivity.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9CalibrationActivity.java
new file mode 100644
index 000000000..6eca0fcc7
--- /dev/null
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9CalibrationActivity.java
@@ -0,0 +1,107 @@
+package nodomain.freeyourgadget.gadgetbridge.devices.watch9;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Handler;
+import android.support.v4.content.LocalBroadcastManager;
+import android.view.View;
+import android.widget.Button;
+import android.widget.NumberPicker;
+
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.activities.AbstractGBActivity;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+
+public class Watch9CalibrationActivity extends AbstractGBActivity {
+
+    private static final String STATE_DEVICE = "stateDevice";
+    GBDevice device;
+
+    NumberPicker pickerHour, pickerMinute, pickerSecond;
+
+    Handler handler;
+    Runnable holdCalibration;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_watch9_calibration);
+
+        pickerHour = findViewById(R.id.np_hour);
+        pickerMinute = findViewById(R.id.np_minute);
+        pickerSecond = findViewById(R.id.np_second);
+
+        pickerHour.setMinValue(1);
+        pickerHour.setMaxValue(12);
+        pickerHour.setValue(12);
+        pickerMinute.setMinValue(0);
+        pickerMinute.setMaxValue(59);
+        pickerMinute.setValue(0);
+        pickerSecond.setMinValue(0);
+        pickerSecond.setMaxValue(59);
+        pickerSecond.setValue(0);
+
+        handler = new Handler();
+        holdCalibration = new Runnable() {
+            @Override
+            public void run() {
+                LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(new Intent(Watch9Constants.ACTION_CALIBRATION_HOLD));
+                handler.postDelayed(this, 10000);
+            }
+        };
+
+        Intent intent = getIntent();
+        device = intent.getParcelableExtra(GBDevice.EXTRA_DEVICE);
+        if (device == null && savedInstanceState != null) {
+            device = savedInstanceState.getParcelable(STATE_DEVICE);
+        }
+        if (device == null) {
+            finish();
+        }
+
+        final Button btCalibrate = findViewById(R.id.watch9_bt_calibrate);
+        btCalibrate.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                btCalibrate.setEnabled(false);
+                handler.removeCallbacks(holdCalibration);
+                Intent calibrationData = new Intent(Watch9Constants.ACTION_CALIBRATION_SEND);
+                calibrationData.putExtra(Watch9Constants.VALUE_CALIBRATION_HOUR, pickerHour.getValue());
+                calibrationData.putExtra(Watch9Constants.VALUE_CALIBRATION_MINUTE, pickerMinute.getValue());
+                calibrationData.putExtra(Watch9Constants.VALUE_CALIBRATION_SECOND, pickerSecond.getValue());
+                LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(calibrationData);
+                finish();
+            }
+        });
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putParcelable(STATE_DEVICE, device);
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        device = savedInstanceState.getParcelable(STATE_DEVICE);
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+        Intent calibration = new Intent(Watch9Constants.ACTION_CALIBRATION);
+        calibration.putExtra(Watch9Constants.ACTION_ENABLE, true);
+        LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(calibration);
+        handler.postDelayed(holdCalibration, 1000);
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        Intent calibration = new Intent(Watch9Constants.ACTION_CALIBRATION);
+        calibration.putExtra(Watch9Constants.ACTION_ENABLE, false);
+        LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(calibration);
+        handler.removeCallbacks(holdCalibration);
+    }
+}
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9Constants.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9Constants.java
new file mode 100644
index 000000000..2f8e2b2f7
--- /dev/null
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9Constants.java
@@ -0,0 +1,76 @@
+package nodomain.freeyourgadget.gadgetbridge.devices.watch9;
+
+import java.util.UUID;
+
+public final class Watch9Constants {
+    public static final UUID UUID_SERVICE_WATCH9 = UUID.fromString("0000a800-0000-1000-8000-00805f9b34fb");
+
+    public static final UUID UUID_UNKNOWN_DESCRIPTOR = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb");
+
+    public static final UUID UUID_CHARACTERISTIC_WRITE = UUID.fromString("0000a801-0000-1000-8000-00805f9b34fb");
+    public static final UUID UUID_CHARACTERISTIC_UNKNOWN_2 = UUID.fromString("0000a802-0000-1000-8000-00805f9b34fb");
+    public static final UUID UUID_CHARACTERISTIC_UNKNOWN_3 = UUID.fromString("0000a803-0000-1000-8000-00805f9b34fb");
+    public static final UUID UUID_CHARACTERISTIC_UNKNOWN_4 = UUID.fromString("0000a804-0000-1000-8000-00805f9b34fb");
+
+    public static final int NOTIFICATION_CHANNEL_DEFAULT = 128;
+    public static final int NOTIFICATION_CHANNEL_PHONE_CALL = 1024;
+
+    public static final byte RESPONSE = 0x13;
+    public static final byte REQUEST = 0x31;
+
+    public static final byte WRITE_VALUE = 0x01;
+    public static final byte READ_VALUE = 0x02;
+    public static final byte TASK = 0x04;
+    public static final byte KEEP_ALIVE = -0x80;
+
+    public static final byte[] CMD_HEADER = new byte[]{0x23, 0x01, 0x00, 0x00, 0x00};
+
+    // byte[] COMMAND = new byte[]{0x23, 0x01, 0x00, 0x31, 0x00, ... , 0x00}
+    //                              |     |     |     |     |     |     └ Checksum
+    //                              |     |     |     |     |     └ Command + value
+    //                              |     |     |     |     └ Sequence number
+    //                              |     |     |     └ Response/Request indicator
+    //                              |     |     └ Value length
+    //                              |     |
+    //                              └-----└ Header
+
+    public static final byte[] CMD_FIRMWARE_INFO                = new byte[]{0x01, 0x02};
+    public static final byte[] CMD_AUTHORIZATION_TASK           = new byte[]{0x01, 0x05};
+    public static final byte[] CMD_TIME_SETTINGS                = new byte[]{0x01, 0x08};
+    public static final byte[] CMD_ALARM_SETTINGS               = new byte[]{0x01, 0x0A};
+    public static final byte[] CMD_BATTERY_INFO                 = new byte[]{0x01, 0x14};
+
+    public static final byte[] CMD_NOTIFICATION_TASK            = new byte[]{0x03, 0x01};
+    public static final byte[] CMD_NOTIFICATION_SETTINGS        = new byte[]{0x03, 0x02};
+    public static final byte[] CMD_CALIBRATION_INIT_TASK        = new byte[]{0x03, 0x31};
+    public static final byte[] CMD_CALIBRATION_TASK             = new byte[]{0x03, 0x33, 0x01};
+    public static final byte[] CMD_CALIBRATION_KEEP_ALIVE       = new byte[]{0x03, 0x34};
+    public static final byte[] CMD_DO_NOT_DISTURB_SETTINGS      = new byte[]{0x03, 0x61};
+
+    public static final byte[] CMD_FITNESS_GOAL_SETTINGS        = new byte[]{0x10, 0x02};
+
+    public static final byte[] RESP_AUTHORIZATION_TASK          = new byte[]{0x01, 0x01, 0x05};
+    public static final byte[] RESP_BUTTON_INDICATOR            = new byte[]{0x04, 0x03, 0x11};
+    public static final byte[] RESP_ALARM_INDICATOR             = new byte[]{-0x80, 0x01, 0x0A};
+
+    public static final byte[] RESP_FIRMWARE_INFO               = new byte[]{0x08, 0x01, 0x02};
+    public static final byte[] RESP_TIME_SETTINGS               = new byte[]{0x08, 0x01, 0x08};
+    public static final byte[] RESP_BATTERY_INFO                = new byte[]{0x08, 0x01, 0x14};
+    public static final byte[] RESP_NOTIFICATION_SETTINGS       = new byte[]{0x08, 0x03, 0x02};
+
+    public static final String ACTION_ENABLE = "action.watch9.enable";
+
+    public static final String ACTION_CALIBRATION
+            = "nodomain.freeyourgadget.gadgetbridge.devices.action.watch9.start_calibration";
+    public static final String ACTION_CALIBRATION_SEND
+            = "nodomain.freeyourgadget.gadgetbridge.devices.action.watch9.send_calibration";
+    public static final String ACTION_CALIBRATION_HOLD
+            = "nodomain.freeyourgadget.gadgetbridge.devices.action.watch9.keep_calibrating";
+    public static final String VALUE_CALIBRATION_HOUR
+            = "value.watch9.calibration_hour";
+    public static final String VALUE_CALIBRATION_MINUTE
+            = "value.watch9.calibration_minute";
+    public static final String VALUE_CALIBRATION_SECOND
+            = "value.watch9.calibration_second";
+
+}
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9DeviceCoordinator.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9DeviceCoordinator.java
new file mode 100644
index 000000000..5a9c6cc72
--- /dev/null
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9DeviceCoordinator.java
@@ -0,0 +1,147 @@
+package nodomain.freeyourgadget.gadgetbridge.devices.watch9;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.bluetooth.le.ScanFilter;
+import android.content.Context;
+import android.net.Uri;
+import android.os.Build;
+import android.os.ParcelUuid;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import nodomain.freeyourgadget.gadgetbridge.GBException;
+import nodomain.freeyourgadget.gadgetbridge.devices.AbstractDeviceCoordinator;
+import nodomain.freeyourgadget.gadgetbridge.devices.InstallHandler;
+import nodomain.freeyourgadget.gadgetbridge.devices.SampleProvider;
+import nodomain.freeyourgadget.gadgetbridge.entities.DaoSession;
+import nodomain.freeyourgadget.gadgetbridge.entities.Device;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
+import nodomain.freeyourgadget.gadgetbridge.model.ActivitySample;
+import nodomain.freeyourgadget.gadgetbridge.model.DeviceType;
+
+public class Watch9DeviceCoordinator extends AbstractDeviceCoordinator {
+    @Override
+    protected void deleteDevice(@NonNull GBDevice gbDevice, @NonNull Device device, @NonNull DaoSession session) throws GBException {
+
+    }
+
+    @NonNull
+    @Override
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    public Collection<? extends ScanFilter> createBLEScanFilters() {
+        ParcelUuid watch9Service = new ParcelUuid(Watch9Constants.UUID_SERVICE_WATCH9);
+        ScanFilter filter = new ScanFilter.Builder().setServiceUuid(watch9Service).build();
+        return Collections.singletonList(filter);
+    }
+
+    @NonNull
+    @Override
+    public DeviceType getSupportedType(GBDeviceCandidate candidate) {
+        String macAddress = candidate.getMacAddress().toUpperCase();
+        String deviceName = candidate.getName().toUpperCase();
+        if (candidate.supportsService(Watch9Constants.UUID_SERVICE_WATCH9)) {
+            return DeviceType.WATCH9;
+        } else if (macAddress.startsWith("1C:87:79")) {
+            return DeviceType.WATCH9;
+        } else if (deviceName.equals("WATCH 9")) {
+            return DeviceType.WATCH9;
+        }
+        return DeviceType.UNKNOWN;
+    }
+
+    @Override
+    public DeviceType getDeviceType() {
+        return DeviceType.WATCH9;
+    }
+
+    @Override
+    public int getBondingStyle(GBDevice deviceCandidate) {
+        return BONDING_STYLE_NONE;
+    }
+
+    @Nullable
+    @Override
+    public Class<? extends Activity> getPairingActivity() {
+        return Watch9PairingActivity.class;
+    }
+
+    @Override
+    public boolean supportsActivityDataFetching() {
+        return false;
+    }
+
+    @Override
+    public boolean supportsActivityTracking() {
+        return false;
+    }
+
+    @Override
+    public SampleProvider<? extends ActivitySample> getSampleProvider(GBDevice device, DaoSession session) {
+        return null;
+    }
+
+    @Override
+    public InstallHandler findInstallHandler(Uri uri, Context context) {
+        return null;
+    }
+
+    @Override
+    public boolean supportsScreenshots() {
+        return false;
+    }
+
+    @Override
+    public boolean supportsAlarmConfiguration() {
+        return true;
+    }
+
+    @Override
+    public boolean supportsSmartWakeup(GBDevice device) {
+        return false;
+    }
+
+    @Override
+    public boolean supportsHeartRateMeasurement(GBDevice device) {
+        return false;
+    }
+
+    @Override
+    public String getManufacturer() {
+        return "Lenovo";
+    }
+
+    @Override
+    public boolean supportsAppsManagement() {
+        return false;
+    }
+
+    @Override
+    public Class<? extends Activity> getAppsManagementActivity() {
+        return null;
+    }
+
+    @Override
+    public boolean supportsCalendarEvents() {
+        return false;
+    }
+
+    @Override
+    public boolean supportsRealtimeData() {
+        return false;
+    }
+
+    @Override
+    public boolean supportsWeather() {
+        return false;
+    }
+
+    @Override
+    public boolean supportsFindDevice() {
+        return false;
+    }
+}
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9PairingActivity.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9PairingActivity.java
new file mode 100644
index 000000000..fe768304d
--- /dev/null
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/watch9/Watch9PairingActivity.java
@@ -0,0 +1,113 @@
+package nodomain.freeyourgadget.gadgetbridge.devices.watch9;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Bundle;
+import android.support.v4.content.LocalBroadcastManager;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import nodomain.freeyourgadget.gadgetbridge.GBApplication;
+import nodomain.freeyourgadget.gadgetbridge.R;
+import nodomain.freeyourgadget.gadgetbridge.activities.AbstractGBActivity;
+import nodomain.freeyourgadget.gadgetbridge.activities.ControlCenterv2;
+import nodomain.freeyourgadget.gadgetbridge.activities.DiscoveryActivity;
+import nodomain.freeyourgadget.gadgetbridge.devices.DeviceCoordinator;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDeviceCandidate;
+import nodomain.freeyourgadget.gadgetbridge.util.AndroidUtils;
+import nodomain.freeyourgadget.gadgetbridge.util.DeviceHelper;
+import nodomain.freeyourgadget.gadgetbridge.util.GB;
+
+public class Watch9PairingActivity extends AbstractGBActivity {
+    private static final Logger LOG = LoggerFactory.getLogger(Watch9PairingActivity.class);
+
+    private static final String STATE_DEVICE_CANDIDATE = "stateDeviceCandidate";
+
+    private TextView message;
+    private GBDeviceCandidate deviceCandidate;
+
+    private final BroadcastReceiver mPairingReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (GBDevice.ACTION_DEVICE_CHANGED.equals(intent.getAction())) {
+                GBDevice device = intent.getParcelableExtra(GBDevice.EXTRA_DEVICE);
+                LOG.debug("pairing activity: device changed: " + device);
+                if (deviceCandidate.getMacAddress().equals(device.getAddress())) {
+                    if (device.isInitialized()) {
+                        pairingFinished();
+                    } else if (device.isConnecting() || device.isInitializing()) {
+                        LOG.info("still connecting/initializing device...");
+                    }
+                }
+            }
+        }
+    };
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_watch9_pairing);
+
+        message = findViewById(R.id.watch9_pair_message);
+        Intent intent = getIntent();
+        deviceCandidate = intent.getParcelableExtra(DeviceCoordinator.EXTRA_DEVICE_CANDIDATE);
+        if (deviceCandidate == null && savedInstanceState != null) {
+            deviceCandidate = savedInstanceState.getParcelable(STATE_DEVICE_CANDIDATE);
+        }
+        if (deviceCandidate == null) {
+            Toast.makeText(this, getString(R.string.message_cannot_pair_no_mac), Toast.LENGTH_SHORT).show();
+            startActivity(new Intent(this, DiscoveryActivity.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
+            finish();
+            return;
+        }
+        startPairing();
+    }
+
+    @Override
+    protected void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putParcelable(STATE_DEVICE_CANDIDATE, deviceCandidate);
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        deviceCandidate = savedInstanceState.getParcelable(STATE_DEVICE_CANDIDATE);
+    }
+
+    @Override
+    protected void onDestroy() {
+        AndroidUtils.safeUnregisterBroadcastReceiver(LocalBroadcastManager.getInstance(this), mPairingReceiver);
+        super.onDestroy();
+    }
+
+    private void startPairing() {
+        message.setText(getString(R.string.pairing, deviceCandidate));
+
+        IntentFilter filter = new IntentFilter(GBDevice.ACTION_DEVICE_CHANGED);
+        LocalBroadcastManager.getInstance(this).registerReceiver(mPairingReceiver, filter);
+
+        GBApplication.deviceService().disconnect();
+        GBDevice device = DeviceHelper.getInstance().toSupportedDevice(deviceCandidate);
+        if (device != null) {
+            GBApplication.deviceService().connect(device, true);
+        } else {
+            GB.toast(this, "Unable to connect, can't recognize the device type: " + deviceCandidate, Toast.LENGTH_LONG, GB.ERROR);
+        }
+    }
+
+    private void pairingFinished() {
+        AndroidUtils.safeUnregisterBroadcastReceiver(LocalBroadcastManager.getInstance(this), mPairingReceiver);
+
+        Intent intent = new Intent(this, ControlCenterv2.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+        startActivity(intent);
+
+        finish();
+    }
+}
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/DeviceType.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/DeviceType.java
index 4486c739d..598704945 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/DeviceType.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/model/DeviceType.java
@@ -48,6 +48,7 @@ public enum DeviceType {
     XWATCH(70, R.drawable.ic_device_default, R.drawable.ic_device_default_disabled, R.string.devicetype_xwatch),
     ZETIME(80, R.drawable.ic_device_default, R.drawable.ic_device_default_disabled, R.string.devicetype_mykronoz_zetime),
     ID115(90, R.drawable.ic_device_h30_h10, R.drawable.ic_device_h30_h10_disabled, R.string.devicetype_id115),
+    WATCH9(100, R.drawable.ic_device_default, R.drawable.ic_device_default_disabled, R.string.devicetype_watch9),
     TEST(1000, R.drawable.ic_device_default, R.drawable.ic_device_default_disabled, R.string.devicetype_test);
 
     private final int key;
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceSupportFactory.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceSupportFactory.java
index 32257f69a..10f3381d1 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceSupportFactory.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/DeviceSupportFactory.java
@@ -43,6 +43,7 @@ import nodomain.freeyourgadget.gadgetbridge.service.devices.hplus.HPlusSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.jyou.TeclastH30Support;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.xwatch.XWatchSupport;
 import nodomain.freeyourgadget.gadgetbridge.service.devices.zetime.ZeTimeDeviceSupport;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.watch9.Watch9DeviceSupport;
 import nodomain.freeyourgadget.gadgetbridge.util.GB;
 
 public class DeviceSupportFactory {
@@ -160,6 +161,9 @@ public class DeviceSupportFactory {
                     case ID115:
                         deviceSupport = new ServiceDeviceSupport(new ID115Support(), EnumSet.of(ServiceDeviceSupport.Flags.BUSY_CHECKING));
                         break;
+                    case WATCH9:
+                        deviceSupport = new ServiceDeviceSupport(new Watch9DeviceSupport(), EnumSet.of(ServiceDeviceSupport.Flags.THROTTLING, ServiceDeviceSupport.Flags.BUSY_CHECKING));
+                        break;
                 }
                 if (deviceSupport != null) {
                     deviceSupport.setContext(gbDevice, mBtAdapter, mContext);
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/watch9/Watch9DeviceSupport.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/watch9/Watch9DeviceSupport.java
new file mode 100644
index 000000000..ba778cea5
--- /dev/null
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/watch9/Watch9DeviceSupport.java
@@ -0,0 +1,605 @@
+package nodomain.freeyourgadget.gadgetbridge.service.devices.watch9;
+
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.Uri;
+import android.support.annotation.IntRange;
+import android.support.v4.content.LocalBroadcastManager;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.Locale;
+import java.util.UUID;
+
+import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventBatteryInfo;
+import nodomain.freeyourgadget.gadgetbridge.deviceevents.GBDeviceEventVersionInfo;
+import nodomain.freeyourgadget.gadgetbridge.devices.watch9.Watch9Constants;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.model.ActivityUser;
+import nodomain.freeyourgadget.gadgetbridge.model.Alarm;
+import nodomain.freeyourgadget.gadgetbridge.model.BatteryState;
+import nodomain.freeyourgadget.gadgetbridge.model.CalendarEventSpec;
+import nodomain.freeyourgadget.gadgetbridge.model.CallSpec;
+import nodomain.freeyourgadget.gadgetbridge.model.CannedMessagesSpec;
+import nodomain.freeyourgadget.gadgetbridge.model.MusicSpec;
+import nodomain.freeyourgadget.gadgetbridge.model.MusicStateSpec;
+import nodomain.freeyourgadget.gadgetbridge.model.NotificationSpec;
+import nodomain.freeyourgadget.gadgetbridge.model.WeatherSpec;
+import nodomain.freeyourgadget.gadgetbridge.service.btle.AbstractBTLEDeviceSupport;
+import nodomain.freeyourgadget.gadgetbridge.service.btle.BLETypeConversions;
+import nodomain.freeyourgadget.gadgetbridge.service.btle.GattService;
+import nodomain.freeyourgadget.gadgetbridge.service.btle.TransactionBuilder;
+import nodomain.freeyourgadget.gadgetbridge.service.btle.actions.SetDeviceStateAction;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.watch9.operations.InitOperation;
+import nodomain.freeyourgadget.gadgetbridge.util.ArrayUtils;
+
+public class Watch9DeviceSupport extends AbstractBTLEDeviceSupport {
+
+    private boolean needsAuth;
+    private int sequenceNumber = 0;
+    private boolean isCalibrationActive = false;
+
+    private byte ACK_CALIBRATION = 0;
+
+    private final GBDeviceEventVersionInfo versionInfo = new GBDeviceEventVersionInfo();
+    private final GBDeviceEventBatteryInfo batteryInfo = new GBDeviceEventBatteryInfo();
+
+    private static final Logger LOG = LoggerFactory.getLogger(Watch9DeviceSupport.class);
+
+    private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            String broadcastAction = intent.getAction();
+            switch (broadcastAction) {
+                case Watch9Constants.ACTION_CALIBRATION:
+                    enableCalibration(intent.getBooleanExtra(Watch9Constants.ACTION_ENABLE, false));
+                    break;
+                case Watch9Constants.ACTION_CALIBRATION_SEND:
+                    int hour = intent.getIntExtra(Watch9Constants.VALUE_CALIBRATION_HOUR, -1);
+                    int minute = intent.getIntExtra(Watch9Constants.VALUE_CALIBRATION_MINUTE, -1);
+                    int second = intent.getIntExtra(Watch9Constants.VALUE_CALIBRATION_SECOND, -1);
+                    if (hour != -1 && minute != -1 && second != -1) {
+                        sendCalibrationData(hour, minute, second);
+                    }
+                    break;
+                case Watch9Constants.ACTION_CALIBRATION_HOLD:
+                    holdCalibration();
+                    break;
+            }
+        }
+    };
+
+    public Watch9DeviceSupport() {
+        super(LOG);
+        addSupportedService(GattService.UUID_SERVICE_GENERIC_ACCESS);
+        addSupportedService(GattService.UUID_SERVICE_GENERIC_ATTRIBUTE);
+        addSupportedService(Watch9Constants.UUID_SERVICE_WATCH9);
+
+        LocalBroadcastManager broadcastManager = LocalBroadcastManager.getInstance(getContext());
+        IntentFilter intentFilter = new IntentFilter();
+        intentFilter.addAction(Watch9Constants.ACTION_CALIBRATION);
+        intentFilter.addAction(Watch9Constants.ACTION_CALIBRATION_SEND);
+        intentFilter.addAction(Watch9Constants.ACTION_CALIBRATION_HOLD);
+        broadcastManager.registerReceiver(broadcastReceiver, intentFilter);
+    }
+
+    @Override
+    protected TransactionBuilder initializeDevice(TransactionBuilder builder) {
+        try {
+            boolean auth = needsAuth;
+            needsAuth = false;
+            new InitOperation(auth, this, builder).perform();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return builder;
+    }
+
+    @Override
+    public boolean connectFirstTime() {
+        needsAuth = true;
+        return super.connect();
+    }
+
+    @Override
+    public boolean useAutoConnect() {
+        return true;
+    }
+
+    @Override
+    public void onNotification(NotificationSpec notificationSpec) {
+        sendNotification(Watch9Constants.NOTIFICATION_CHANNEL_DEFAULT, false);
+    }
+
+    private void sendNotification(int notificationChannel, boolean isStopNotification) {
+        try {
+            TransactionBuilder builder = performInitialized("showNotification");
+            byte[] command = Watch9Constants.CMD_NOTIFICATION_TASK;
+            command[1] = (byte) (isStopNotification ? 0x04 : 0x01);
+            builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                    buildCommand(command,
+                            Watch9Constants.TASK,
+                            Conversion.toByteArr32(notificationChannel)));
+            performImmediately(builder);
+        } catch (IOException e) {
+            LOG.warn("Unable to send notification", e);
+        }
+    }
+
+    private Watch9DeviceSupport enableNotificationChannels(TransactionBuilder builder) {
+        builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                buildCommand(Watch9Constants.CMD_NOTIFICATION_SETTINGS,
+                        Watch9Constants.WRITE_VALUE,
+                        new byte[]{(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF}));
+
+        return this;
+    }
+
+    public Watch9DeviceSupport authorizationRequest(TransactionBuilder builder, boolean firstConnect) {
+        builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                buildCommand(Watch9Constants.CMD_AUTHORIZATION_TASK,
+                        Watch9Constants.TASK,
+                        new byte[]{(byte) (firstConnect ? 0x00 : 0x01)})); //possibly not the correct meaning
+
+        return this;
+    }
+
+    private Watch9DeviceSupport enableDoNotDisturb(TransactionBuilder builder, boolean active) {
+        builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                buildCommand(Watch9Constants.CMD_DO_NOT_DISTURB_SETTINGS,
+                        Watch9Constants.WRITE_VALUE,
+                        new byte[]{(byte) (active ? 0x01 : 0x00)}));
+
+        return this;
+    }
+
+    private void enableCalibration(boolean enable) {
+        try {
+            TransactionBuilder builder = performInitialized("enableCalibration");
+            builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                    buildCommand(Watch9Constants.CMD_CALIBRATION_INIT_TASK,
+                            Watch9Constants.TASK,
+                            new byte[]{(byte) (enable ? 0x01 : 0x00)}));
+            performImmediately(builder);
+        } catch (IOException e) {
+            LOG.warn("Unable to start/stop calibration mode", e);
+        }
+    }
+
+    private void holdCalibration() {
+        try {
+            TransactionBuilder builder = performInitialized("holdCalibration");
+            builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                    buildCommand(Watch9Constants.CMD_CALIBRATION_KEEP_ALIVE,
+                            Watch9Constants.KEEP_ALIVE));
+            performImmediately(builder);
+        } catch (IOException e) {
+            LOG.warn("Unable to keep calibration mode alive", e);
+        }
+    }
+
+    private void sendCalibrationData(@IntRange(from=0,to=23)int hour, @IntRange(from=0,to=59)int minute, @IntRange(from=0,to=59)int second) {
+        try {
+            isCalibrationActive = true;
+            TransactionBuilder builder = performInitialized("calibrate");
+            int handsPosition = ((hour % 12) * 60 + minute) * 60 + second;
+            builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                    buildCommand(Watch9Constants.CMD_CALIBRATION_TASK,
+                            Watch9Constants.TASK,
+                            Conversion.toByteArr16(handsPosition)));
+            performImmediately(builder);
+        } catch (IOException e) {
+            isCalibrationActive = false;
+            LOG.warn("Unable to send calibration data", e);
+        }
+    }
+
+    private void getTime() {
+        try {
+            TransactionBuilder builder = performInitialized("getTime");
+            builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                    buildCommand(Watch9Constants.CMD_TIME_SETTINGS,
+                            Watch9Constants.READ_VALUE));
+            performImmediately(builder);
+        } catch (IOException e) {
+            LOG.warn("Unable to get device time", e);
+        }
+    }
+
+    private void handleTime(byte[] time) {
+        GregorianCalendar now = BLETypeConversions.createCalendar();
+        GregorianCalendar nowDevice = BLETypeConversions.createCalendar();
+        int year = (nowDevice.get(Calendar.YEAR) / 100) * 100 + Conversion.fromBcd8(time[8]);
+        nowDevice.set(year,
+                Conversion.fromBcd8(time[9]) - 1,
+                Conversion.fromBcd8(time[10]),
+                Conversion.fromBcd8(time[11]),
+                Conversion.fromBcd8(time[12]),
+                Conversion.fromBcd8(time[13]));
+        nowDevice.set(Calendar.DAY_OF_WEEK, Conversion.fromBcd8(time[16]) + 1);
+
+        long timeDiff = (Math.abs(now.getTimeInMillis() - nowDevice.getTimeInMillis())) / 1000;
+        if (10 < timeDiff && timeDiff < 120) {
+            enableCalibration(true);
+            setTime(BLETypeConversions.createCalendar());
+            enableCalibration(false);
+        }
+    }
+
+    private void setTime(Calendar calendar) {
+        try {
+            TransactionBuilder builder = performInitialized("setTime");
+            int timezoneOffsetMinutes = (calendar.get(Calendar.ZONE_OFFSET) + calendar.get(Calendar.DST_OFFSET)) / (60 * 1000);
+            int timezoneOffsetIndustrialMinutes = Math.round((Math.abs(timezoneOffsetMinutes) % 60) * 100f / 60f);
+            byte[] time = new byte[]{Conversion.toBcd8(calendar.get(Calendar.YEAR) % 100),
+                    Conversion.toBcd8(calendar.get(Calendar.MONTH) + 1),
+                    Conversion.toBcd8(calendar.get(Calendar.DAY_OF_MONTH)),
+                    Conversion.toBcd8(calendar.get(Calendar.HOUR_OF_DAY)),
+                    Conversion.toBcd8(calendar.get(Calendar.MINUTE)),
+                    Conversion.toBcd8(calendar.get(Calendar.SECOND)),
+                    (byte) (timezoneOffsetMinutes / 60),
+                    (byte) timezoneOffsetIndustrialMinutes,
+                    (byte) (calendar.get(Calendar.DAY_OF_WEEK) - 1)
+            };
+            builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                    buildCommand(Watch9Constants.CMD_TIME_SETTINGS,
+                            Watch9Constants.WRITE_VALUE,
+                            time));
+            performImmediately(builder);
+        } catch (IOException e) {
+            LOG.warn("Unable to set time", e);
+        }
+    }
+
+    public Watch9DeviceSupport getFirmwareVersion(TransactionBuilder builder) {
+        builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                buildCommand(Watch9Constants.CMD_FIRMWARE_INFO,
+                        Watch9Constants.READ_VALUE));
+
+        return this;
+    }
+
+    private Watch9DeviceSupport getBatteryState(TransactionBuilder builder) {
+        builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                buildCommand(Watch9Constants.CMD_BATTERY_INFO,
+                        Watch9Constants.READ_VALUE));
+
+        return this;
+    }
+
+    private Watch9DeviceSupport setFitnessGoal(TransactionBuilder builder) {
+        int fitnessGoal = new ActivityUser().getStepsGoal();
+        builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                buildCommand(Watch9Constants.CMD_FITNESS_GOAL_SETTINGS,
+                        Watch9Constants.WRITE_VALUE,
+                        Conversion.toByteArr16(fitnessGoal)));
+
+        return this;
+    }
+
+    public Watch9DeviceSupport initialize(TransactionBuilder builder) {
+        getFirmwareVersion(builder)
+                .getBatteryState(builder)
+                .enableNotificationChannels(builder)
+                .enableDoNotDisturb(builder, false)
+                .setFitnessGoal(builder);
+        builder.add(new SetDeviceStateAction(getDevice(), GBDevice.State.INITIALIZED, getContext()));
+        builder.setGattCallback(this);
+
+        return this;
+    }
+
+    @Override
+    public void onDeleteNotification(int id) {
+
+    }
+
+    @Override
+    public void onSetTime() {
+        getTime();
+    }
+
+    @Override
+    public void onSetAlarms(ArrayList<? extends Alarm> alarms) {
+        try {
+            TransactionBuilder builder = performInitialized("setAlarms");
+            for (Alarm alarm : alarms) {
+                setAlarm(alarm, alarm.getIndex() + 1, builder);
+            }
+            builder.queue(getQueue());
+        } catch (IOException e) {
+            LOG.warn("Unable to set alarms", e);
+        }
+    }
+
+    // No useful use case at the moment, used to clear alarm slots for testing.
+    private void deleteAlarm(TransactionBuilder builder, int index) {
+        if (0 < index && index < 4) {
+            byte[] alarmValue = new byte[]{(byte) index, 0x00, 0x00, 0x00, 0x00, 0x00};
+            builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                    buildCommand(Watch9Constants.CMD_ALARM_SETTINGS,
+                            Watch9Constants.WRITE_VALUE,
+                            alarmValue));
+        }
+    }
+
+    private void setAlarm(Alarm alarm, int index, TransactionBuilder builder) {
+        // Shift the GB internal repetition mask to match the device specific one.
+        byte repetitionMask = (byte) ((alarm.getRepetitionMask() << 1) | (alarm.isRepetitive() ? 0x80 : 0x00));
+        repetitionMask |= (alarm.getRepetition(Alarm.ALARM_SUN) ? 0x01 : 0x00);
+        if (0 < index && index < 4) {
+            byte[] alarmValue = new byte[]{(byte) index,
+                    Conversion.toBcd8(alarm.getAlarmCal().get(Calendar.HOUR_OF_DAY)),
+                    Conversion.toBcd8(alarm.getAlarmCal().get(Calendar.MINUTE)),
+                    repetitionMask,
+                    (byte) (alarm.isEnabled() ? 0x01 : 0x00),
+                    0x00 // TODO: Unknown
+            };
+            builder.write(getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE),
+                    buildCommand(Watch9Constants.CMD_ALARM_SETTINGS,
+                            Watch9Constants.WRITE_VALUE,
+                            alarmValue));
+        }
+    }
+
+    @Override
+    public void onSetCallState(CallSpec callSpec) {
+        switch (callSpec.command) {
+            case CallSpec.CALL_INCOMING:
+                sendNotification(Watch9Constants.NOTIFICATION_CHANNEL_PHONE_CALL, false);
+                break;
+            case CallSpec.CALL_START:
+            case CallSpec.CALL_END:
+                sendNotification(Watch9Constants.NOTIFICATION_CHANNEL_PHONE_CALL, true);
+                break;
+            default:
+                break;
+        }
+    }
+
+    @Override
+    public void onSetCannedMessages(CannedMessagesSpec cannedMessagesSpec) {
+
+    }
+
+    @Override
+    public void onSetMusicState(MusicStateSpec stateSpec) {
+
+    }
+
+    @Override
+    public void onSetMusicInfo(MusicSpec musicSpec) {
+
+    }
+
+    @Override
+    public void onEnableRealtimeSteps(boolean enable) {
+
+    }
+
+    @Override
+    public void onInstallApp(Uri uri) {
+
+    }
+
+    @Override
+    public void onAppInfoReq() {
+
+    }
+
+    @Override
+    public void onAppStart(UUID uuid, boolean start) {
+
+    }
+
+    @Override
+    public void onAppDelete(UUID uuid) {
+
+    }
+
+    @Override
+    public void onAppConfiguration(UUID appUuid, String config, Integer id) {
+
+    }
+
+    @Override
+    public void onAppReorder(UUID[] uuids) {
+
+    }
+
+    @Override
+    public void onFetchRecordedData(int dataTypes) {
+
+    }
+
+    @Override
+    public void onReboot() {
+
+    }
+
+    @Override
+    public void onHeartRateTest() {
+
+    }
+
+    @Override
+    public void onEnableRealtimeHeartRateMeasurement(boolean enable) {
+
+    }
+
+    @Override
+    public void onFindDevice(boolean start) {
+
+    }
+
+    @Override
+    public void onSetConstantVibration(int integer) {
+
+    }
+
+    @Override
+    public void onScreenshotReq() {
+
+    }
+
+    @Override
+    public void onEnableHeartRateSleepSupport(boolean enable) {
+
+    }
+
+    @Override
+    public void onSetHeartRateMeasurementInterval(int seconds) {
+
+    }
+
+    @Override
+    public void onAddCalendarEvent(CalendarEventSpec calendarEventSpec) {
+
+    }
+
+    @Override
+    public void onDeleteCalendarEvent(byte type, long id) {
+
+    }
+
+    @Override
+    public void onSendConfiguration(String config) {
+        TransactionBuilder builder;
+        try {
+            builder = performInitialized("sendConfig: " + config);
+            switch (config) {
+                case ActivityUser.PREF_USER_STEPS_GOAL:
+                    setFitnessGoal(builder);
+                    break;
+            }
+            builder.queue(getQueue());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void onTestNewFunction() {
+
+    }
+
+    @Override
+    public void onSendWeather(WeatherSpec weatherSpec) {
+
+    }
+
+    @Override
+    public boolean onCharacteristicChanged(BluetoothGatt gatt,
+                                           BluetoothGattCharacteristic characteristic) {
+        super.onCharacteristicChanged(gatt, characteristic);
+
+        UUID characteristicUUID = characteristic.getUuid();
+        if (Watch9Constants.UUID_CHARACTERISTIC_WRITE.equals(characteristicUUID)) {
+            byte[] value = characteristic.getValue();
+            if (ArrayUtils.equals(value, Watch9Constants.RESP_FIRMWARE_INFO, 5)) {
+                handleFirmwareInfo(value);
+            } else if (ArrayUtils.equals(value, Watch9Constants.RESP_BATTERY_INFO, 5)) {
+                handleBatteryState(value);
+            } else if (ArrayUtils.equals(value, Watch9Constants.RESP_TIME_SETTINGS, 5)) {
+                handleTime(value);
+            } else if (ArrayUtils.equals(value, Watch9Constants.RESP_BUTTON_INDICATOR, 5)) {
+                LOG.info("Unhandled action: Button pressed");
+            } else if (ArrayUtils.equals(value, Watch9Constants.RESP_ALARM_INDICATOR, 5)) {
+                LOG.info("Alarm active: id=" + value[8]);
+            } else if (isCalibrationActive && value.length == 7 && value[4] == ACK_CALIBRATION) {
+                setTime(BLETypeConversions.createCalendar());
+                isCalibrationActive = false;
+            }
+
+            return true;
+        } else {
+            LOG.info("Unhandled characteristic changed: " + characteristicUUID);
+            logMessageContent(characteristic.getValue());
+        }
+
+        return false;
+    }
+
+    private byte[] buildCommand(byte[] command, byte action) {
+        return buildCommand(command, action, null);
+    }
+
+    private byte[] buildCommand(byte[] command, byte action, byte[] value) {
+        if (Arrays.equals(command, Watch9Constants.CMD_CALIBRATION_TASK)) {
+            ACK_CALIBRATION = (byte) sequenceNumber;
+        }
+        command = BLETypeConversions.join(command, value);
+        byte[] result = new byte[7 + command.length];
+        System.arraycopy(Watch9Constants.CMD_HEADER, 0, result, 0, 5);
+        System.arraycopy(command, 0, result, 6, command.length);
+        result[2] = (byte) (command.length + 1);
+        result[3] = Watch9Constants.REQUEST;
+        result[4] = (byte) sequenceNumber++;
+        result[5] = action;
+        result[result.length - 1] = calculateChecksum(result);
+
+        return result;
+    }
+
+    private byte calculateChecksum(byte[] bytes) {
+        byte checksum = 0x00;
+        for (int i = 0; i < bytes.length - 1; i++) {
+            checksum += (bytes[i] ^ i) & 0xFF;
+        }
+        return (byte) (checksum & 0xFF);
+    }
+
+    private void handleFirmwareInfo(byte[] value) {
+        versionInfo.fwVersion = String.format(Locale.US,"%d.%d.%d", value[8], value[9], value[10]);
+        handleGBDeviceEvent(versionInfo);
+    }
+
+    private void handleBatteryState(byte[] value) {
+        batteryInfo.state = value[9] == 1 ? BatteryState.BATTERY_NORMAL : BatteryState.BATTERY_LOW;
+        batteryInfo.level = GBDevice.BATTERY_UNKNOWN;
+        handleGBDeviceEvent(batteryInfo);
+    }
+
+    @Override
+    public void dispose() {
+        LocalBroadcastManager broadcastManager = LocalBroadcastManager.getInstance(getContext());
+        broadcastManager.unregisterReceiver(broadcastReceiver);
+        super.dispose();
+    }
+
+    private static class Conversion {
+        static byte toBcd8(@IntRange(from = 0, to = 99) int value) {
+            int high = (value / 10) << 4;
+            int low = value % 10;
+            return (byte) (high | low);
+        }
+
+        static int fromBcd8(byte value) {
+            int high = ((value & 0xF0) >> 4) * 10;
+            int low = value & 0x0F;
+            return high + low;
+        }
+
+        static byte[] toByteArr16(int value) {
+            return new byte[]{(byte) (value >> 8), (byte) value};
+        }
+
+        static byte[] toByteArr32(int value) {
+            return new byte[]{(byte) (value >> 24),
+                    (byte) (value >> 16),
+                    (byte) (value >> 8),
+                    (byte) value};
+        }
+    }
+}
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/watch9/operations/InitOperation.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/watch9/operations/InitOperation.java
new file mode 100644
index 000000000..a2c87d958
--- /dev/null
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/watch9/operations/InitOperation.java
@@ -0,0 +1,77 @@
+package nodomain.freeyourgadget.gadgetbridge.service.devices.watch9.operations;
+
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.widget.Toast;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.UUID;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.watch9.Watch9Constants;
+import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
+import nodomain.freeyourgadget.gadgetbridge.service.btle.AbstractBTLEOperation;
+import nodomain.freeyourgadget.gadgetbridge.service.btle.TransactionBuilder;
+import nodomain.freeyourgadget.gadgetbridge.service.btle.actions.SetDeviceStateAction;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.watch9.Watch9DeviceSupport;
+import nodomain.freeyourgadget.gadgetbridge.util.ArrayUtils;
+import nodomain.freeyourgadget.gadgetbridge.util.GB;
+
+public class InitOperation extends AbstractBTLEOperation<Watch9DeviceSupport>{
+
+    private static final Logger LOG = LoggerFactory.getLogger(InitOperation.class);
+
+    private final TransactionBuilder builder;
+    private final boolean needsAuth;
+    private final BluetoothGattCharacteristic cmdCharacteristic = getCharacteristic(Watch9Constants.UUID_CHARACTERISTIC_WRITE);
+
+    public InitOperation(boolean needsAuth, Watch9DeviceSupport support, TransactionBuilder builder) {
+        super(support);
+        this.needsAuth = needsAuth;
+        this.builder = builder;
+        builder.setGattCallback(this);
+    }
+
+    @Override
+    protected void doPerform() throws IOException {
+        builder.notify(cmdCharacteristic, true);
+        if (needsAuth) {
+            builder.add(new SetDeviceStateAction(getDevice(), GBDevice.State.AUTHENTICATING, getContext()));
+            getSupport().authorizationRequest(builder, needsAuth);
+        } else {
+            builder.add(new SetDeviceStateAction(getDevice(), GBDevice.State.INITIALIZING, getContext()));
+            getSupport().initialize(builder);
+            getSupport().performImmediately(builder);
+        }
+    }
+
+    @Override
+    public boolean onCharacteristicChanged(BluetoothGatt gatt,
+                                           BluetoothGattCharacteristic characteristic) {
+        UUID characteristicUUID = characteristic.getUuid();
+        if (Watch9Constants.UUID_CHARACTERISTIC_WRITE.equals(characteristicUUID) && needsAuth) {
+            try {
+                byte[] value = characteristic.getValue();
+                getSupport().logMessageContent(value);
+                if (ArrayUtils.equals(value, Watch9Constants.RESP_AUTHORIZATION_TASK, 5) && value[8] == 0x01) {
+                    TransactionBuilder builder = getSupport().createTransactionBuilder("authInit");
+                    builder.setGattCallback(this);
+                    builder.add(new SetDeviceStateAction(getDevice(), GBDevice.State.INITIALIZING, getContext()));
+                    getSupport().initialize(builder).performImmediately(builder);
+                } else {
+                    return super.onCharacteristicChanged(gatt, characteristic);
+                }
+            } catch (Exception e) {
+                GB.toast(getContext(), "Error authenticating Watch 9", Toast.LENGTH_LONG, GB.ERROR, e);
+            }
+            return true;
+        } else {
+            LOG.info("Unhandled characteristic changed: " + characteristicUUID);
+            return super.onCharacteristicChanged(gatt, characteristic);
+        }
+    }
+
+
+}
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DeviceHelper.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DeviceHelper.java
index 1f3cdb531..8caf2974f 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DeviceHelper.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/util/DeviceHelper.java
@@ -58,6 +58,7 @@ import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.no1f1.No1F1Coordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.pebble.PebbleCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.vibratissimo.VibratissimoCoordinator;
+import nodomain.freeyourgadget.gadgetbridge.devices.watch9.Watch9DeviceCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.xwatch.XWatchCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.devices.zetime.ZeTimeCoordinator;
 import nodomain.freeyourgadget.gadgetbridge.entities.Device;
@@ -215,6 +216,7 @@ public class DeviceHelper {
         result.add(new XWatchCoordinator());
         result.add(new ZeTimeCoordinator());
         result.add(new ID115Coordinator());
+        result.add(new Watch9DeviceCoordinator());
 
         return result;
     }
diff --git a/app/src/main/res/layout/activity_watch9_calibration.xml b/app/src/main/res/layout/activity_watch9_calibration.xml
new file mode 100644
index 000000000..48caf1eca
--- /dev/null
+++ b/app/src/main/res/layout/activity_watch9_calibration.xml
@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/tv_note"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentStart="true"
+        android:layout_alignParentTop="true"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="16dp"
+        android:text="@string/discovery_note"
+        android:textColor="@color/accent"
+        android:textStyle="bold" />
+
+    <TextView
+        android:id="@+id/tv_hint"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignStart="@+id/tv_note"
+        android:layout_below="@+id/tv_note"
+        android:layout_marginTop="16dp"
+        android:text="@string/watch9_calibration_hint" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_above="@id/watch9_bt_calibrate"
+        android:layout_below="@id/tv_hint"
+        android:orientation="horizontal"
+        android:paddingLeft="8dp"
+        android:paddingRight="8dp"
+        android:baselineAligned="false">
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_marginLeft="8dp"
+            android:layout_marginRight="8dp"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/watch9_time_hours"
+                android:textAllCaps="true"
+                android:textColor="@color/accent" />
+
+            <NumberPicker
+                android:id="@+id/np_hour"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:descendantFocusability="blocksDescendants"  />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_marginLeft="8dp"
+            android:layout_marginRight="8dp"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/watch9_time_minutes"
+                android:textAllCaps="true"
+                android:textColor="@color/accent" />
+
+            <NumberPicker
+                android:id="@+id/np_minute"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:descendantFocusability="blocksDescendants"  />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_marginLeft="8dp"
+            android:layout_marginRight="8dp"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/watch9_time_seconds"
+                android:textAllCaps="true"
+                android:textColor="@color/accent" />
+
+            <NumberPicker
+                android:id="@+id/np_second"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:descendantFocusability="blocksDescendants"  />
+        </LinearLayout>
+
+
+
+    </LinearLayout>
+
+    <Button
+        android:id="@+id/watch9_bt_calibrate"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_centerHorizontal="true"
+        android:layout_marginBottom="16dp"
+        android:padding="16dp"
+        android:text="@string/watch9_calibration_button" />
+
+</RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_watch9_pairing.xml b/app/src/main/res/layout/activity_watch9_pairing.xml
new file mode 100644
index 000000000..2add84aa2
--- /dev/null
+++ b/app/src/main/res/layout/activity_watch9_pairing.xml
@@ -0,0 +1,33 @@
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    tools:context="nodomain.freeyourgadget.gadgetbridge.devices.watch9.Watch9PairingActivity">
+
+    <TextView
+        android:text="@string/pairing"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/watch9_pair_message" />
+
+    <ProgressBar
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/progressBar"
+        android:layout_marginTop="25dp"
+        android:layout_below="@+id/watch9_pair_message"
+        android:layout_centerHorizontal="true" />
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/watch9_pairing_tap_hint"
+        android:id="@+id/watch9_pair_hint"
+        android:layout_centerVertical="true"
+        android:layout_alignParentStart="true" />
+
+</RelativeLayout>
diff --git a/app/src/main/res/layout/device_itemv2.xml b/app/src/main/res/layout/device_itemv2.xml
index 4ad19fb84..f8ff97f1b 100644
--- a/app/src/main/res/layout/device_itemv2.xml
+++ b/app/src/main/res/layout/device_itemv2.xml
@@ -269,6 +269,21 @@
                 card_view:srcCompat="@drawable/ic_action_find_lost_device"
                 android:focusable="true" />
 
+            <ImageView
+                android:id="@+id/device_action_calibrate"
+                android:layout_width="40dp"
+                android:layout_height="40dp"
+                android:layout_below="@id/device_image"
+                android:layout_margin="4dp"
+                android:layout_toEndOf="@id/device_action_find"
+                android:clickable="true"
+                android:contentDescription="@string/controlcenter_calibrate_device"
+                android:padding="4dp"
+                android:scaleType="fitXY"
+                android:tint="@color/secondarytext"
+                card_view:srcCompat="@drawable/ic_activity_unknown"
+                android:focusable="true" />
+
         </RelativeLayout>
 
     </android.support.v7.widget.CardView>
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 1de993644..33cda9a30 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -542,5 +542,13 @@
 
 
     <string name="pref_auto_fetch_summary">Das Abrufen erfolgt beim Entsperren des Bildschirms. Funktioniert nur, wenn ein Sperrmechanismus eingestellt ist!</string>
+    <string name="watch9_pairing_tap_hint">Sobald die Uhr vibriert, den Knopf betätigen oder kurz schütteln.</string>
+    <string name="watch9_calibration_button">Kalibrieren</string>
+    <string name="title_activity_watch9_pairing">Watch 9 koppeln</string>
+    <string name="watch9_time_minutes">Minuten:</string>
+    <string name="watch9_time_hours">Stunden:</string>
+    <string name="watch9_time_seconds">Sekunden:</string>
+    <string name="title_activity_watch9_calibration">Watch 9 kalibrieren</string>
+    <string name="watch9_calibration_hint">Stelle die Uhrzeit ein, die aktuell auf der Uhr zusehen ist.</string>
 
-    </resources>
+</resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 29cab8301..5a8d22d89 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -21,6 +21,7 @@
     <string name="controlcenter_snackbar_disconnecting">Disconnecting</string>
     <string name="controlcenter_snackbar_connecting">Connecting</string>
     <string name="controlcenter_snackbar_requested_screenshot">Taking a screenshot of the device</string>
+    <string name="controlcenter_calibrate_device">Calibrate Device</string>
 
 
     <string name="title_activity_debug">Debug</string>
@@ -269,6 +270,7 @@
     <string name="candidate_item_device_image">Device image</string>
     <string name="miband_prefs_alias">Name/Alias</string>
     <string name="pref_header_vibration_count">Vibration count</string>
+    <string name="watch9_pairing_tap_hint">When your watch vibrates, shake the device or press its button.</string>
 
     <string name="title_activity_sleepmonitor">Sleep monitor</string>
     <string name="pref_write_logfiles">Write log files</string>
@@ -577,6 +579,7 @@
     <string name="devicetype_xwatch">XWatch</string>
     <string name="devicetype_mykronoz_zetime">MyKronoz ZeTime</string>
     <string name="devicetype_id115">ID115</string>
+    <string name="devicetype_watch9">Watch 9</string>
 
     <string name="choose_auto_export_location">Choose export location</string>
     <string name="notification_channel_name">Gadgetbridge notifications</string>
@@ -595,4 +598,12 @@
     <string name="menuitem_alipay">Alipay</string>
     <string name="menuitem_music">Music</string>
     <string name="menuitem_more">More</string>
+
+    <string name="watch9_time_minutes">Minutes:</string>
+    <string name="watch9_time_hours">Hours:</string>
+    <string name="watch9_time_seconds">Seconds:</string>
+    <string name="watch9_calibration_hint">Set the time your device is showing to you right now.</string>
+    <string name="watch9_calibration_button">Calibrate</string>
+    <string name="title_activity_watch9_pairing">Watch 9 pairing</string>
+    <string name="title_activity_watch9_calibration">Watch 9 calibration</string>
 </resources>