How to turn on Bluetooth on the Xiaomi thermometer: detailed instructions with photos and tips

Xiaomi's smart thermometers are not just medical devices, they're full-fledged gadgets that can transmit body temperature data directly to your smartphone. But what if Bluetooth doesn't turn on or the device isn't detected in the app? Most often, the problem lies in improper activation of the module or synchronization errors.

In this article, we’ll look at how to turn on Bluetooth on Xiaomi thermometers from the classic Mi Thermometer to the more modern versions with Mi Home and Zepp Life support. You’ll learn where the power button is, how to reset if the gadget doesn’t respond, and what to do if the phone doesn’t see the thermometer, and also the typical user errors and ways to avoid them.

If you’re first to encounter Xiaomi’s smart medical devices, don’t worry: the setup process is easier than it seems, but follow the instructions and don’t miss important steps like updating your firmware or checking your smartphone’s compatibility.

What Xiaomi Thermometers Support Bluetooth?

Not all the brand’s thermometers are equipped with a Bluetooth module. For example, the simplest models with an infrared sensor (for example, the Xiaomi iHealth Thermometer) can only work offline. LE:

• 🔹 Xiaomi Mi Thermometer (classic version with white body)
• 🔹 Mijia Bluetooth Thermometer (with Mi Home support)
• 🔹 Xiaomi Mi Bunny Thermometer (children's version with a rabbit)
• 🔹 Zepp Life Smart Thermometer (newest model with advanced synchronization)
• 🔹 Xiaomi Smartmi Thermometer 2 (with improved sensor)

To find out if your thermometer has Bluetooth, check:

1. The presence of the power button (usually it is one and located on the end or bottom of the body).
2. Mention of wireless in the manual or on the box (look for BLE or Bluetooth 4.0/5.0 icons).
3. Support for Mi Home, Zepp Life or Mi Fit applications.

If your model is not on this list, it probably doesn't support Bluetooth connectivity, so you'll have to manually read the data from the screen.

Where is the Bluetooth button on the thermometer?

In most Xiaomi smart thermometers, the power button performs two functions at once: activate the device and turn on Bluetooth.

• 📍 Mi Thermometer: The button is on the end of the case next to the display. Press and hold it for 3-5 seconds until the indicator flashes.
• 📍 Mijia Bluetooth Thermometer: the button is hidden under the battery compartment cover, and you have to remove the lid to get to it.
• 📍 Zepp Life Smart Thermometer: Touch button, located on the front panel below the display.

If nothing happens after the pressing:

1. Check the battery charge (in some models, the indicator does not burn when discharged).
2. Make sure the thermometer is not locked (for example, after a fall).
3. Try resetting the settings (about this in the next section).

💡

On touch-button models (like Zepp Life), double taping at 1 second intervals sometimes helps.

Step-by-step: how to turn on Bluetooth and connect the thermometer to the phone

Now, to the main thing, Bluetooth activation and phone pairing, the instructions are suitable for most models, but there may be slight differences in the application interface.

Step 1. Turn on Bluetooth on the thermometer

1. Press and hold the on button (usually 3-5 seconds) until the indicator flashes blue or green.
2. On models with a display, the inscription BT ON or Bluetooth icon will appear.

Step 2: Install the required application

Depending on the model of the thermometer, download one of the applications:

• 📱 Mi Home – Most Mijia and Mi Thermometer devices.
• 📱 Zepp Life for the Zepp series thermometers.
• 📱 Mi Fit – if the thermometer synchronizes with Xiaomi fitness bracelets.

Step 3: Connect the thermometer in the app

1. Open the app and go to Devices → Add the device.
2. Choose Health or Medical Devices category.
3. In the list, find your thermometer (such as Mi Thermometer) and click Connect.
4. Follow the instructions on the screen. You usually need to confirm the pairing on your phone.

Bluetooth on the thermometer (flashing indicator)

The correct app (Mi Home, Zepp Life, etc.) is installed

The thermometer is located next to the phone (no further than 1 meter)

Bluetooth and geolocation enabled on the phone (for some models)-->

Step 4. Check the synchronization

After successful connection:

• 🔄 On the display of the thermometer will appear Bluetooth icon or tick.
• 📲 The app will display the current temperature (if you have measured it).
• 🔋 Make sure the battery level is displayed correctly.

Table: Compatibility of Xiaomi thermometers with applications

Not all thermometers work with all Xiaomi applications, and the table below shows the latest compatibility data (2026):

If your model is not listed, check the manufacturer’s manual or website. For example, smart home thermometers (such as Xiaomi Smart Home Thermometer) may require a connection via Mi Home but not support for Zepp Life.

What to do if Bluetooth is not turned on?

Sometimes the thermometer doesn't respond to the push of a button, or the indicator doesn't blink, and here are the main reasons and ways to fix them:

• 🔋 Battery discharge: Replace the battery (usually a battery) CR2032). On some models, when the charge is low, Bluetooth turns off automatically.
• 🔄 Device freeze: reset (press the button for 10-15 seconds) and then the thermometer will reset.
• 📱 Smartphone problems: Restart your phone, update your firmware, or check if antivirus is blocking your connection.
• 🔌 Contact damage: If the thermometer falls or gets wet, inspect the battery compartment for oxidation.

Important: On Zepp Life Smart Thermometers, after 5 failed attempts to connect, Bluetooth is locked for 1 minute.Wait before trying again.

If nothing works, check if the warranty period has expired. In some cases, the problem may be a hardware failure (for example, a Bluetooth module failed), in which case, contact the Xiaomi service center.

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Before resetting the thermometer, make sure that it does not have important unsynchronized data on it. After resetting, the measurement history will be deleted!

How to update thermometer firmware for stable Bluetooth operation?

If your Xiaomi thermometer is plugged in, but the connection is constantly breaking or the data is transmitted with errors, you may need a firmware update.

Step 1. Check the current firmware version

1. Open the app (Mi Home or Zepp Life)
2. Go to the thermometer settings (usually through Device → Settings → About Device).
3. Find the firmware version item.

Step 2. Update the firmware

1. If an update is available, an Update button will appear.
2. Make sure the thermometer is charged (or the battery is not discharged).
3. Confirm the update and wait until it is completed (usually takes 1-3 minutes).

⚠️ Attention.

Do not interrupt the update process, even if it seems that the thermometer “hangs”. Disabling Bluetooth or closing the application can damage the firmware, and the device will have to be handed over to the service.

After the update:

• 🔄 Reset the thermometer (turn off and on).
• 📱 Reconnect it in the app.
• 📊 Check that the data is now transmitted without errors.

Typical errors when connecting the thermometer via Bluetooth

Even experienced users sometimes have problems setting up smart thermometers, and here are the most common mistakes and how to avoid them:

• 📵 Bluetooth is off on your phone: it seems obvious, but many people forget to check it. Also make sure that Flight mode is off.
• 📍 Thermometer too far from the phone: maximum distance for Bluetooth LE — about 10 meters, but for a stable connection it is better to keep the device at a distance of 1-2 meters.
• 🔒 The thermometer is already connected to another device: if the gadget was previously paired with another phone or tablet, first remove it from the list of conjugated devices.
• 📱 Outdated version of the app: Mi Home and Zepp Life are regularly updated. If you have an older version, some features may not work.
• 🔋 Low battery power: Some models have Bluetooth powered down to save energy when the charge level is below 10.

⚠️ Attention.

If you use an iPhone, make sure that the Privacy → Bluetooth settings allow the app (Mi Home or Zepp Life) to access geolocation. Without that, pairing may not work.

FAQ: Frequent questions about Bluetooth on Xiaomi thermometers