Aqara Temperature and Humidity Sensor Not Reporting

Common Causes

• Battery is low or dead
• The sensor is out of Zigbee range from the Aqara hub
• The sensor is placed near heat sources or in direct sunlight, causing inaccurate readings
• The sensor's reporting interval may make it appear unresponsive (it does not update in real time)
• Hub is offline or has a firmware issue
• The sensor has lost its Zigbee pairing

Fix 1: Replace the Battery

1. The Aqara Temperature and Humidity Sensor uses a CR2032 coin cell battery.
2. Remove the back cover by twisting or prying it off with a coin.
3. Replace the battery with a fresh CR2032, positive (+) side facing up.
4. Reattach the cover. The sensor's LED should blink once to confirm it has power.
5. Check the Aqara Home app after a few minutes to see if the sensor begins reporting temperature and humidity data.

Fix 2: Understand the Reporting Interval

The Aqara Temperature and Humidity Sensor does not report continuously. To conserve battery life, it sends updates at intervals or when a significant change in temperature or humidity is detected (typically a change of 0.5 degrees Celsius or 6 percent humidity).

1. If the readings in the app appear stale, wait 10 to 15 minutes for the next scheduled report.
2. To force an immediate reading, press the small button on the side of the sensor. This triggers a manual report and the app should update within seconds.
3. If the reading updates after a manual press but does not update automatically, the sensor is working correctly — it simply has not detected a significant change to report.

Fix 3: Relocate the Sensor

Environmental factors around the sensor can cause inaccurate or misleading readings.

1. Move the sensor away from direct sunlight, which heats the sensor body and causes artificially high temperature readings.
2. Keep the sensor away from heating vents, radiators, stoves, or appliances that generate heat.
3. Avoid placing the sensor directly against cold exterior walls or near drafty windows, which can cause readings that do not represent the overall room temperature.
4. Position the sensor in an open area at roughly chest height (about 1 to 1.5 meters) for the most representative room measurements.
5. Do not place the sensor inside enclosed spaces like cabinets or drawers unless you specifically want to monitor that microclimate.

Fix 4: Check the Aqara Hub

1. Open the Aqara Home app and verify your hub is online. If the hub is offline, no Zigbee sensor data will reach the app.
2. Restart the hub by unplugging it for 10 seconds and plugging it back in.
3. Wait 1 to 2 minutes for the hub and sensors to reconnect. Temperature sensors should begin reporting again automatically.

Fix 5: Re-Pair the Sensor

If the sensor shows as offline or unavailable after a hub restart and battery replacement:

1. Remove the sensor from the Aqara Home app (device page > Settings > Remove Device).
2. Press and hold the button on the sensor for 5 seconds until the LED blinks rapidly, entering pairing mode.
3. In the app, tap + and add the sensor again. Hold it within 1 to 2 meters of the hub during pairing.
4. Once paired, assign it to the correct room. Any previous automations linked to the old sensor instance will need to be recreated.

Fix 6: Improve Zigbee Range

If the sensor goes offline periodically, especially if it is in a room far from the hub:

1. Place a mains-powered Zigbee device (Aqara Smart Plug, wired wall switch) between the hub and the temperature sensor. Powered Zigbee devices act as mesh repeaters.
2. Restart the hub after adding repeater devices so the Zigbee network can reorganize its routing.
3. Keep the hub in a central location, elevated and away from metal enclosures.

Fix 7: Calibrate or Compare Readings

If the sensor reports readings that seem off compared to another thermometer or hygrometer:

• Place both the Aqara sensor and a known-accurate thermometer side by side in the same location for 30 minutes.
• Compare the readings. Small differences (within 1 degree Celsius or 5 percent humidity) are normal for consumer-grade sensors.
• Some Aqara sensors support a calibration offset in the Aqara Home app. Check the sensor's settings for a temperature or humidity offset option and adjust it to match the reference thermometer.

When to Contact Support

If the sensor does not power on or enter pairing mode with a fresh battery, or if it consistently reports wildly inaccurate values (like 50 degrees Celsius in a 20-degree room) that cannot be corrected with a calibration offset, contact Aqara Support for a warranty replacement.