How to Set Up Your Aqara Temperature and Humidity Sensor

The Aqara Temperature and Humidity Sensor is a compact Zigbee sensor that continuously monitors the temperature, humidity, and atmospheric pressure in your home. It pairs with your Aqara Hub and reports data to the Aqara Home app, where you can view real-time readings, review historical trends, and create automations based on environmental conditions.

What You Will Need

• Aqara Temperature and Humidity Sensor
• Aqara Hub (M2, M3, or Camera Hub G3) already set up on your network
• Aqara Home app installed on your smartphone (iOS or Android)
• CR2032 coin cell battery (included)

Preparing the Sensor

1. Remove the sensor from its packaging.
2. Pull the battery isolation tab from the back of the sensor to activate the CR2032 battery.
3. A small LED should flash once to confirm the sensor is powered on.

Pairing with Your Aqara Hub

1. Open the Aqara Home app on your smartphone.
2. Tap the + icon in the upper-right corner.
3. Select Temperature and Humidity Sensor from the device list, or scan the QR code on the packaging.
4. Choose the Aqara Hub to pair with.
5. Press and hold the reset button on the side of the sensor for 5 seconds until the LED flashes rapidly.
6. Wait for the app to discover and connect the sensor.
7. Assign it to a room and name it, such as "Bedroom Climate" or "Nursery Temperature."

Choosing the Best Location

Where you place the sensor directly affects the accuracy of its readings. Follow these guidelines:

• Place the sensor at breathing level — on a nightstand, shelf, or desk — rather than on the floor or near the ceiling, where temperature can differ significantly from the rest of the room.
• Keep the sensor away from direct sunlight, heating vents, radiators, and air conditioning outlets, which will skew temperature readings.
• Avoid placing the sensor in an enclosed space such as a drawer or closed cabinet.
• For monitoring specific areas like a wine cellar, closet, or greenhouse, place the sensor directly in that space.
• Ensure the sensor is within Zigbee range of your hub — typically within 10 to 15 meters with minimal wall obstructions.

Reading Your Data

Open the sensor in the Aqara Home app to view:

• Temperature — Displayed in Celsius or Fahrenheit. You can change the unit in the app settings.
• Humidity — Shown as a percentage. Ideal indoor humidity is between 30% and 60%.
• Atmospheric pressure — Displayed in kPa. This reading can be useful for weather-sensitive individuals or for tracking weather patterns.
• Historical data — View temperature and humidity trends over time with built-in charts.

Setting Up Climate Automations

Use temperature and humidity readings to trigger smart home actions:

1. Go to the Automations tab in the Aqara Home app.
2. Tap + to create a new automation.
3. Select the Temperature and Humidity Sensor as the trigger.
4. Choose a condition such as "Temperature rises above 28°C" or "Humidity drops below 30%."
5. Add your desired action and save.

Practical automation ideas:

• Turn on a fan or air conditioner via a smart plug when the temperature exceeds a threshold.
• Activate a humidifier when humidity drops below 30% to maintain comfortable air quality.
• Send a notification if the temperature in a wine cellar or server room goes outside the safe range.
• Turn on a dehumidifier when humidity exceeds 60% to prevent mold growth in a basement.
• Control IR-equipped AC units through the Hub M2's built-in IR blaster based on real-time temperature data.

Using with Apple HomeKit

If your Aqara Hub is connected to Apple HomeKit, the temperature and humidity sensor will appear in the Apple Home app. You can view readings directly on your Home screen, use them in HomeKit automations, and ask Siri for the current temperature in any room.

Tips

• The CR2032 battery typically lasts about two years. The app will notify you when the battery is low.
• Place sensors in multiple rooms to build a complete picture of your home's climate and identify hot or cold spots.
• Temperature and humidity readings update every few minutes, not in real time. Allow a moment for changes to appear in the app after significant environmental shifts.
• Keep the sensor clean and free of dust for the most accurate readings.