How to Use Xiaomi Smart Libras: A Complete Guide from Connection to Data Analysis

Introduction: Why Smart Scales Are Needed and How They Work

Xiaomi smart scales are not just a weight measuring device, but a full-fledged body composition analyzer that integrates with the Mi Home ecosystem and the Mi Fit app. Unlike classic mechanical or electronic scales, these devices use bioimpedance analysis (BIA) technology, passing a weak electric current through the body to assess muscle mass, bone tissue, water level and even viscosity fat.

The main advantage of such weights is automatic synchronization of data with the phone via Bluetooth, which allows you to track the dynamics of changes in real time. For example, Xiaomi Mi Body Composition Scale 2 or Xiaomi Smart Scale 2 models support up to 13 health metrics, including body mass index (BMI), basic metabolic rate (BMR) and even “body age.” But to get accurate results, it is important not only to get on the scale correctly, but also to adjust them correctly.

In this article, we will look at all the steps of working with Xiaomi smart scales, from unpacking and first switching on to interpreting indicators and eliminating typical errors, and pay special attention to nuances that the manufacturer often does not say – for example, how the time of day affects the accuracy of measurements or why the scales can show different weights when re-weighing.

Packaging and equipment: what should be in the box

Before using it for the first time, check the weights. The standard set for most Xiaomi models (such as Mi Scale 2 or Smart Scale 2) includes:

• 📦 The scales themselves are in the protective film.
• 🔋 4 type batteries AAA (sometimes installed)
• 📄 Short instructions in several languages (including Russian)
• 📱 QR-code for downloading the Mi Fit application

Not having at least one of these elements is a reason to contact the seller, and note the glass surface: cracks or chips are not acceptable because they can affect the accuracy of the sensors, and check the contacts for the batteries, which must be clean, without oxidation.

⚠️ Note: If the scales were purchased used, be sure to reset them to factory settings through the Mi Fit app (Profile) → Devices → Weight settings → Otherwise, the data of the previous owner may distort your measurements.

Xiaomi Mi Body Composition Scale 2 models are additionally equipped with metal electrodes to measure body composition; they can not be wet or cleaned with abrasives, only with a dry cloth; if the electrodes are damaged, the scales will not be able to correctly analyze muscle mass and fat deposits.

Connecting the scales to the phone: step-by-step instructions

To start transferring data to your smartphone, you need to link it to your Xiaomi account via the Mi Fit app. Download it from Google Play or the App Store (for iOS). Make sure your phone has Bluetooth enabled and location permissions enabled (required for device search).

Follow the algorithm further:

1. Open Mi Fit and log in (or sign up if you don’t have an account).
2. Click Profile → Add the device → Libra.
3. Select your model from the list (e.g. Mi Body Composition Scale 2).
4. Stand on the scales – a confirmation code (e.g. E123) will appear on the display.
5. Enter this code into the application and wait for the message about the successful binding.

If the scales are not detected, try:

• 🔄 Reboot Bluetooth on your phone.
• 📱 Remove the cache of the Mi Fit application in the smartphone settings.
• 🔋 Replace batteries in scales (even if they are new – sometimes contacts oxidize during storage).

Once attached, the scales automatically sync the data with each weighing. However, if you use multiple devices (such as a smartphone and a tablet), the data can be duplicated. To avoid this, in the Mi Fit settings, turn off automatic synchronization on secondary devices (Settings → Devices → [Your scales] → Data Sync).

How to weigh yourself: 7 rules for accurate data

Xiaomi's smart scales are not only calibrated, but also measured in terms of accuracy. The manufacturer claims that the error is ±50 g for weight and ±3% for body composition, but in practice these numbers may differ.

1. Time of day: Weigh yourself on an empty stomach in the morning after going to the toilet. In the evening, weight can vary by 1-2 kg due to food and liquids eaten.
2. Surface: Put the scales on the hard floor (tile, laminate). Carpet or linoleum can soften the load by distorting the readings.
3. Clothing: Weigh yourself without clothes or in light clothing (underwear) Metal elements (lightning, buttons) affect bioimpedance analysis.
4. Pose: Stand flat, spread the weight on both legs. Don't lean on the wall or furniture.
5. Skin moisture: The feet should be dry – sweat or cream increases conductivity, distorting fat mass data.
6. Temperature: Cold feet (such as after the outdoors in winter) can understate muscle mass.
7. Measurement frequency: To analyze the dynamics, weigh at the same time, no more than 1 time per day.

If the scales show unrealistic values (for example, 0% fat or weight 10 kg less than real), calibrate:

1. Stand on the scale and wait for a stable weight display.
2. Get off the scale and wait 5 seconds.
3. Repeat the weighting – the data must be updated.

💡

For a more accurate analysis of body composition, drink a glass of water before weighing. A dehydrated body can lower muscle mass by 2 to 5%.

Xiaomi Mi Body Composition Scale 2 models support the Guest mode, which allows you to weigh yourself without being tied to your account, but in this case, the data is not stored in Mi Fit, and the analysis of body composition will be less accurate (excluding gender, age and height).

Decoding indicators: what do metrics in Mi Fit mean

Mi Fit displays up to 13 parameters, but not everyone understands what they mean.

Pay attention to the baseline metabolic rate (BMR) — This is the amount of calories your body uses at rest, for example, if you're a person who's not a person. BMR = 1500 calories, and you consume 2,000 calories a day without physical activity, an extra 500 calories will turn into fat. In Mi Fit, you can set your weight target, and the app automatically calculates the recommended daily calorie intake.

Visceral fat is a measure of the amount of fat around the internal organs, and a level above 10 is considered a health hazard (risk of diabetes and cardiovascular disease), and if it's high, you should see your doctor, even if your overall weight is normal.

⚠️ Attention: Body composition indicators (fat, muscle, water) are estimates, not medical diagnostics, DEXA-Xiaomi scales can understate the percentage of fat in athletes due to high muscle mass.

Sync with other services: Google Fit, Apple Health, Strava

Xiaomi scale data can be exported to third-party health apps, which is useful if you use multiple trackers (like Mi Band + scales) or want to analyze data in Google Fit or Apple Health.

To set up synchronization:

1. Open Mi Fit and go to Profile → Settings → Data Synchronization.
2. Choose the service (Google Fit, Apple Health or Strava).
3. Log in to the selected service and allow access.
4. Specify what data to transmit (weight, steps, sleep, etc.).

Please note:

• 🔄 Synchronization works only in one direction: from Mi Fit to third-party service.
• ⏳ Data is updated with a delay of up to 10 minutes.
• 📵 If you disable access, historical data in the third-party service will remain, but new will cease to arrive.

For iPhone users, an important nuance is that Apple Health does not support importing body composition data (fat, muscle, water) — only weight. To circumvent this limitation, use intermediary apps such as Health Sync or Sync Solver.

💡

To accurately track progress, use a single service (e.g., only Mi Fit or only Google Fit) synchronizing with multiple platforms can duplicate data at the same time.

Typical errors and their elimination

Even with the right setup, Xiaomi scales can malfunction, and here are the most common problems and ways to solve them:

If the scales show an Err error, it could mean:

• 🔋 Replace batteries with new ones, even if they seem to work).
• 🌡️ A sharp temperature drop (transfer the scales to a room with a temperature of 10–40)°C).
• 🔧 Sensor damage (check if there are cracks on the glass surface).

For resetting settings to factory:

1. Hold the power button (if any) for 10 seconds.
2. Or in Mi Fit go to Profile → Devices → [Your scales] → Settings → Reset.

⚠️ Warning: After reset, all data not synchronized with Mi Fit will be lost.Before reset, make sure that the last weighing is stored in the application.

FAQ: Answers to Frequent Questions