Xiaomi Mi Body Composition Scale 2 is not just a weight measurement device, but a full body composition analyzer with 13 key metrics: from fat percentage to muscle mass. However, many users face difficulties already at the stage of first connection. Libra is not determined by the phone, the Mi Fit app does not see the device, or the data is incorrectly synchronized. In this article, we will analyze all the ways of connection, from the standard procedure via Bluetooth to alternative methods for older smartphones.
The Mi Body 2 model is a feature that requires binding to a Xiaomi/Zepp (formerly Huami) account, without which the scales will work like normal mechanical scales, without saving history and analyzing dynamics. We will explain in detail how to avoid typical errors: why the scales do not connect to the iPhone after the iOS 17 update, how to reset to factory settings if the device is “hang”, and what to do if the application gives an error “failed to connect to the device”.
1.What you need to connect Xiaomi Mi Body Composition Scale 2
Before you start setting up, make sure you have everything you need. Unlike simple scales, Mi Body 2 requires not only a smartphone, but also the right software.
- 📱 Smartphone on Android 6.0+ or iOS 12.0+ (Bluetooth 4.0 and higher support is mandatory).
- 🔋 Charged scales: Charge indicator should be green when you press the power button. If flashing red, you need to charge (use the original cable). USB-C).
- 🌐 Installed application: Mi Fit (for Android/iOS) or Zepp Life (an alternative for new Xiaomi devices) download the latest version from the App Store or Google Play.
- 🆔 Account. Xiaomi/Zepp: If you already have a Mi Account (for example, for a Redmi smartphone), use it.
Important: If you’ve previously used Mi Body Composition Scale 1, please note that the second version has a different connection protocol. Older versions of Mi Fit (up to 5.0) may not support the new model – update the app!
2. Step-by-step instruction: connection via Mi Fit
The standard way to tie the scales is through the official app. Follow the instructions carefully, as skipping the steps can cause synchronization to fail.
- Turn on Bluetooth on your smartphone and make sure the scales are unlocked (click the on button – the indicator should light up).
- Open Mi Fit and log in to your account. If you don't have an account, sign up (use a valid email or phone number).
- Go to the section "Profile» → «Add device. In the list, select "Libra» → «Mi Body Composition Scale 2».
- Follow the app's hints: 🔄 Press the scale to activate the pairing mode (the indicator will start flashing blue). 📱 Wait for the smartphone to detect the device (can take up to 30 seconds). ✅ Confirm the connection in the pop-up window.
Complete the setup
Once successfully connected, the scales automatically synchronize data with each weighing, and the first measurement can take up to 10 seconds — that's fine, as the device calibrates.
☑️ Checklist before connection
3. Alternative ways of connecting
If the standard method didn't work, try one of the alternatives. They'll come in handy if:
- 📵 Libras are not determined through Mi Fit (for example, on older Android smartphones).
- 🔄 The application gives an error "The device is not supported».
- 🍎 On the iPhone scales are connected, but do not transmit data.
Method 1: Connecting with Zepp Life
Zepp Life (formerly Amazfit) is an alternative app for Xiaomi devices that sometimes works more stable than Mi Fit.
- Remove Mi Fit (if installed) and download Zepp Life.
- Sign up or sign in through your Xiaomi account.
- Go to Profile → Add Device → Libra.
- Select Mi Body Composition Scale 2 and follow the hints.
Method 2: Resetting the scales to factory settings
If the scales were previously linked to another account or the connection was “hang”:
- Turn on the scales (press the button).
- Hold the 10 seconds button until the indicator flashes red and blue.
- Release the button, the scales will reset. Now they can be reconnected.
Why is the scale not connected to the iPhone?
Set-up and calibration
Once connected, the scales require initial calibration, without which the body composition (fat, muscle, water) can have an error of up to 10-15%.
- Please provide accurate personal information in Mi Fit: 📏 Growth (up to 1 cm). 👶 Age (important for calculating metabolism). ♂/♀ Gender (analysis algorithms are different for men and women).
Perform a test weigh-in
- Stand on the scales with bare feet (socks distort the reading).
- Stay still until the screen ticks.
- Wait 5-7 seconds after the weight stabilization – the device will measure impedance (tissue resistance).
- Check the units of measurement: in Mi Fit go to Profile → Settings → Units of measurement and select kg/pounds.
Tip: For maximum accuracy, weigh yourself on an empty stomach in the morning after going to the toilet, avoiding measurements after exercise or eating - this will distort the data on fat and water in the body.
| Parameter | Normal for men | Norm for women | What affects accuracy |
|---|---|---|---|
| Percentage of fat | 10–20% | 20–30% | Hydration level, time of day, meals |
| Muscle mass | 35–45% | 25–35% | Physical activity, age |
| Water level | 50–65% | 45–60% | The amount of liquid drunk, ambient temperature |
| Bone mass | 3–5% | 2–4% | Genetics, diet (calcium, vitamin D) |
5. Typical errors and their solution
Even with the right connection, users face problems.
⚠️ Warning: If the scales show weight but don't transmit data to the app, check if the Mi Fit has Bluetooth blocked in the background. → Annexes → Mi Fit → Permits → Additionally. → Background work.
- 🔴 Unconnected Error Reasons: Bluetooth is disabled or scales are discharged. Libra is already tied to another account (reset needed) Outdated version of Mi Fit (update app) Solution: Reboot your smartphone and scales, reconnect.
- 📉 Data not saved Reasons: No Internet (data synced to the cloud) Mi Fit disabled the option "Autosynchronization". Account not confirmed (check out) email/SMS). Solution: Turn on mobile internet or Wi-Fi, update data manually in the app.
- ⚖️ Scales show wrong weight Causes: Uneven surface (floor must be firm and flat). Scales are not calibrated (stand on them and hold for 5 seconds); Dust or moisture on sensors (wipe the contacts with a dry cloth).
💡
If the scales stopped syncing after the Mi Fit update, remove the device from the application (Profile → Mi Body 2 → Delete), then reconnect.
6. synchronization with other services (Google Fit, Apple Health)
Data from the Mi Body Composition Scale 2 can be automatically exported to Google Fit or Apple Health, which is convenient for comprehensive health analysis along with other gadgets (for example, Mi Band or Apple Watch).
For Android (Google Fit):
- Open Mi Fit and go to Profile → Settings → Data Sync.
- Select Google Fit and log in to your Google account.
- Allow access to data on body weight and composition.
For iPhone (Apple Health):
- In Mi Fit go to "Profile» → «Apple Health».
- Turn on the switches opposite the parameters you want to sync (weight, fat percentage, etc.).
- Confirm access in the Apple Health pop-up window.
Important: synchronization works only one way - from Mi Fit to Google Fit/Apple Health. Data transfer is not possible back.
💡
To accurately track the dynamics, use one Xiaomi account on all devices. If you weigh on different scales (for example, at home and in the hall), the data can be duplicated.
7. Update of the firmware of the scales
Xiaomi periodically releases firmware updates for the Mi Body Composition Scale 2, which improve sensor accuracy and connectivity stability.
- Make sure the scales are connected to Mi Fit and charged at least 50%.
- Open the app and go to Profile → Mi Body 2 → Firmware Update.
- If a new version is available, click Update and wait until it is completed (don’t turn off the scales!).
Warning: Don't interrupt the update process! If the scales "hang" during the firmware stage, a full reset may be required (hold the 15-second button).
⚠️ Attention: After updating the firmware, the scales may temporarily show incorrect data (for example, an overestimated percentage of fat). This is due to recalibration of the sensors. Perform 2-3 test weighings to stabilize the readings.