diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/HuamiService.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/HuamiService.java
index 6940c9a78..bc1911d3f 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/HuamiService.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/devices/huami/HuamiService.java
@@ -228,6 +228,7 @@ public class HuamiService {
     public static final byte COMMAND_ACTIVITY_DATA_TYPE_STRESS_AUTOMATIC = 0x13;
     public static final byte COMMAND_ACTIVITY_DATA_TYPE_SPO2_NORMAL = 0x25;
     public static final byte COMMAND_ACTIVITY_DATA_TYPE_SPO2_SLEEP = 0x26;
+    public static final byte COMMAND_ACTIVITY_DATA_TYPE_SLEEP_RESPIRATORY_RATE = 0x38;
     public static final byte COMMAND_ACTIVITY_DATA_TYPE_RESTING_HEART_RATE = 0x3a;
 
     public static final byte COMMAND_FIRMWARE_INIT = 0x01; // to UUID_CHARACTERISTIC_FIRMWARE, followed by fw file size in bytes
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/operations/FetchSleepRespiratoryRateOperation.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/operations/FetchSleepRespiratoryRateOperation.java
new file mode 100644
index 000000000..877f61b5b
--- /dev/null
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/operations/FetchSleepRespiratoryRateOperation.java
@@ -0,0 +1,68 @@
+/*  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.operations;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.GregorianCalendar;
+
+import nodomain.freeyourgadget.gadgetbridge.devices.huami.HuamiService;
+import nodomain.freeyourgadget.gadgetbridge.service.devices.huami.HuamiSupport;
+
+/**
+ * An operation that fetches sleep respiratory rate data.
+ */
+public class FetchSleepRespiratoryRateOperation extends AbstractRepeatingFetchOperation {
+    private static final Logger LOG = LoggerFactory.getLogger(FetchSleepRespiratoryRateOperation.class);
+
+    public FetchSleepRespiratoryRateOperation(final HuamiSupport support) {
+        super(support, HuamiService.COMMAND_ACTIVITY_DATA_TYPE_SLEEP_RESPIRATORY_RATE, "sleep respiratory rate data");
+    }
+
+    @Override
+    protected boolean handleActivityData(final GregorianCalendar timestamp, final byte[] bytes) {
+        if (bytes.length % 8 != 0) {
+            LOG.error("Unexpected length for sleep respiratory rate data {}, not divisible by 8", bytes.length);
+            return false;
+        }
+
+        final ByteBuffer buf = ByteBuffer.wrap(bytes).order(ByteOrder.LITTLE_ENDIAN);
+
+        while (buf.position() < bytes.length) {
+            final long timestampSeconds = buf.getInt();
+            final byte unknown1 = buf.get(); // always 4?
+            final int respiratoryRate = buf.get() & 0xff;
+            final byte unknown2 = buf.get(); // always 0?
+            final byte unknown3 = buf.get(); // mostly 1, sometimes 2, 4 when waking up?
+
+            timestamp.setTimeInMillis(timestampSeconds * 1000L);
+
+            LOG.debug("Sleep Respiratory Rate at {}: respiratoryRate={} unknown1={} unknown2={} unknown3={}", timestamp.getTime(), respiratoryRate, unknown1, unknown2, unknown3);
+            // TODO save
+        }
+
+        return true;
+    }
+
+    @Override
+    protected String getLastSyncTimeKey() {
+        return "lastSleepRespiratoryRateTimeMillis";
+    }
+}