Xiaomi Mi Scale smart scales (including Mi Body Composition Scale 2, Smart Scale 2 and Xiaomi Scale 3) have become an integral part of a healthy lifestyle for millions of users, not only measuring weight, but also analyzing body composition, synchronizing with the Mi Fit app (now Zepp Life), and integrating into the Mi Home ecosystem. However, even the most reliable technique sometimes fails: readings become inaccurate, data are not synchronized, and the scales suddenly “forget” previous settings.
In this article, we will explore all the ways Xiaomi can zero weights, from application reset to manual calibration and hardware recovery. You will learn how to return accurate readings, fix connection errors and avoid typical problems when working with a device.
Why Xiaomi should be reset: 5 reasons
Before starting a reset, it is important to understand whether it is really necessary. Users often confuse temporary failures (such as battery discharge) with serious malfunctions.
- 📉 Inaccurate readings: Scales systematically understate or overweight (a difference of more than 1-2 kg compared to control measurements).
- 🔄 Synchronization errors: data is not sent to Mi Fit/Zepp Life, Bluetooth is enabled, and the smartphone is nearby.
- ⚠️ Persistent errors: Err, Lo (low charge) or --- (no communication) codes appear on the screen.
- 🔋 Failures after battery replacement: The scales do not turn on or operate unstable after new batteries are installed.
- 📱 Application conflict: Scales are defined in Mi Fit as an "unknown device" or require re-binding.
If at least one of these symptoms is present regularly, resetting will help to return the device to working condition.
Replace your batteries with new ones (even if the indicator shows charge)
Reboot your smartphone and reinstall the Mi Fit/Zepp Life app
Make sure the scales are on a flat, solid surface (not on the carpet!)
Check if there are any interference from other Bluetooth devices (headphones, fitness bracelets)
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If these measures have not worked, start zeroing. In the next section, we will look at three main methods, starting with the simplest one.
Method 1: Software reset via Mi Fit/Zepp Life
The safest way to zero is to use the official app, which is suitable for most Xiaomi Mi Scale models and does not require physical intervention in the device.
- Open the Mi Fit app (or Zepp Life if you’re using the new version) on your smartphone.
- Go to the Profile → Devices section and select your scales.
- Press three points (⋮) in the upper right corner and select Device Settings.
- Scroll down and find the option to Reset Data or Untie the Device (depending on the software version).
- Confirm the action. Libra will be disconnected from the account, and their memory will be cleared.
Then, repeat the following:
- Turn on Bluetooth on your smartphone.
- Stand on the scales - they should blink and emit an audible signal.
- In the app, click Add Device and follow the instructions on the screen.
This method doesn't reset the sensor calibration, it only clears the user's data and synchronization settings. If the problem was inaccurate readings, move on to the next one.
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If the app doesn’t have a Data Reset option, try untie the scales first and then remove them from the device list in your smartphone’s Bluetooth settings. Then re-assign – this often helps with synchronization errors.
Method 2: Hardware button reset (for models with a physical button)
Some versions of Xiaomi scales, such as the Mi Body Composition Scale 2, feature a hidden reset button, which is located on the underside of the case and is usually marked with a small hole with the inscription RESET. To zero you will need a thin object (a paper clip, toothpick or a special tool from the kit).
Instructions for hardware discharge:
- Turn the scales over and find the RESET hole (usually next to the battery compartment).
- Insert the paperclip and press the button for 5-10 seconds until the indicator blinks twice.
- Release the button and wait for the reboot (the scales will emit an audible signal).
- Stand on the scale for automatic calibration (0.0 will appear on the screen).
If after resetting the scales show Err or not included, check:
- 🔋 Polarity of batteries (they must be set strictly according to the circuit in the compartment).
- 📶 Interference from other Bluetooth devices (turn them off while you set up).
- 📱 Smartphone compatibility (Xiaomi scales require Android 5.0+ or iOS 10.0+).
What to do if the RESET button doesn’t work?
Hardware reset completely resets the sensor calibration, so you may need to reconfigure the app after that, and if that doesn't work, then you can go to manual calibration.
Method 3: Manual calibration of scales (for accurate readings)
If the scales show weight with a constant error (for example, always +1.5 kg), the problem may be in the downgraded calibration of the sensors. In this case, manual adjustment using a reference will help. You will need a weight or an object with an exact known weight (for example, a water bottle of 1.5 l = 1.5 kg, a pack of sugar = 1 kg).
Step-by-step:
- Turn on the scales and wait for zeros (0.0).
- Place a reference load on them (for example, a weight of 10 kg).
- Press the RESET button (or touch the sensor if the button is not there) and hold for 5 seconds until the scales squeak.
- Take the load off and wait for automatic zeroing, and the scales will store new calibration data.
For models without the RESET button (e.g. Xiaomi Mi Scale 3), use an alternative method:
- Stand on the scale and wait for measurements.
- Without leaving the scale, tap the touch button (usually below the screen) and hold for 10 seconds.
- The scale will emit a double signal, which means that the calibration is reset.
- Repeat the measurement with the reference load for adjustment.
After calibration, check the accuracy on several items, and if the error persists, the sensor may be damaged, in which case repair or replacement will be required.
Mi Body Composition Scale 2|Xiaomi Smart Scale 2|Xiaomi Mi Scale 3|Another model.|I don't know. -->
Zeroing the data in the application: how to delete the measurement history
Sometimes users don't want to reset the scales themselves, but rather the measurement history in the Mi Fit/Zepp Life app. This may be necessary when selling a device or if the data is distorted. Please note: deletion of the history cannot be canceled, so pre-export the data if it is important.
How to clear up history:
- Open the app and go to Profile → Devices → Your scales.
- Select the History or Data tab.
- Click on the three dots (⋮) in the upper right corner and select Delete Data.
- Specify the period (e.g., "All the time") and confirm the deletion.
If you want to delete the data of a particular measurement:
- 📅 Find a record in the history and swipe left (on iOS) or hold your finger (on Android).
- 🗑️ The Remove button will appear, press it.
Note that deleting your history in the app does not reset your weight settings. If you are selling a device, be sure to complete a reset (method 1 or 2) and untie the scales from your account.
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Deleting the history in the application does not affect the operation of the scales. To completely "zero" the device, you need to reset its settings through the RESET button or the application.
Frequent Mistakes and How to Avoid Them
When Xiaomi weighs zero, users often face typical problems, and we have collected the most common errors and ways to solve them:
| Mistake. | Reason. | Decision |
|---|---|---|
| Err on screen | Sensor failure or incorrect calibration | Perform manual calibration (method 3) or hardware reset (method 2) |
| Libras not included | Batteries discharged or contacts oxidized | Replace batteries, clean contacts with alcohol |
| Not synchronized with the application | Outdated version of Mi Fit or Bluetooth conflict | Update the app, reboot your smartphone, disable other Bluetooth devices |
| Indications "jump" | Uneven surface or interference from electrical appliances | Place the scales on a solid flat surface, remove from the microwave / router |
| Libra is defined as an “unknown device” | Firmware failure or account conflict | Reset the scales to factory settings and tie again |
Pay special attention to the Lo error (low charge). Even if the batteries are new, the contacts could oxidize. Wipe them with a cotton swab soaked in alcohol and put the batteries tightly in.
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If the scales after the reset show an error of ±0.3-0.5 kg, this is normal - the error is acceptable for household devices.
Zeroing Xiaomi’s weights for sale or transfer to another user
If you're planning to sell or give up the scales, it's not enough to just reset the settings, you have to completely remove the account attachment, otherwise the new owner won't be able to connect them.
Perform a hardware reset (method 2)
Untie the scales from the account in Mi Fit/Zepp Life
Remove the device from the Bluetooth list on your smartphone
Clear the measurement history in the app (optional)
Check the availability of a new account (at the request of the buyer)
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If the scales were linked to the Xiaomi account (via Mi Home), additionally:
- Open the Mi Home app.
- Go to Profile. → Devices.
- Find the scales, click on them and select Remove the device.
After that, the scales will be clean and ready for a new binding, and if the buyer can't connect them, offer them:
- 📱 Install the latest version of Mi Fit/Zepp Life.
- 🔄 Reboot your smartphone and scales (remove batteries for 30 seconds).
- 📋 Check if its region is supported (some Xiaomi models have regional restrictions).