The first introduction to smart health gadgets often begins with a pleasant surprise at their minimalism and lack of visible power buttons on the case. It is this feature - the lack of a physical "Power" button - that often confuses users, forcing them to look for hidden holes or try to disassemble the device. Smart scales from Xiaomi and their sub-brands (such as Mijia or Redmi) are designed to activate automatically when interacting with a person, which saves battery power and simplifies the design.
The primary activation process requires a certain sequence of actions, ignoring which can lead to a false conclusion about the malfunction of the device. In most cases, if the scales do not respond, the problem is not in the defect, but in the protective transport insulator or the specifics of the pressure sensors, you need to understand that the electronics of the floor scales are in a dormant mode until the signal from the strain gauges.
This article is designed to dispel myths about activation complexity and provide a comprehensive algorithm for all popular models. We will examine the nuances of working with Xiaomi Mi Body Composition Scale 2, Mi Scale 2 and newer versions, and also consider situations when the device requires “waking up” after a long downtime.
Preparation of the device for the first launch
Before you try to activate the electronics, you have to physically prepare the device for operation. Often users forget about the simplest things, such as removing the protective film or removing the insulators, which blocks the work of the contact group. Carefully examine the bottom of the case, there may be a sticker with technical information that is sometimes mistaken for part of the structure, but you do not need to tear it off unless it closes the battery compartment.
Special attention should be paid to the power supply. Many models, such as the Mi Body Fat Scale, come with batteries already installed, but a dielectric tongue is laid between them and the contacts. This is standard practice for storing the charge of the batteries during long storage in a warehouse. If you do not remove this plastic separator, the chain will not close, and the scales will remain "dead".
⚠️ Warning: Do not use old or oxidized batteries, even if they are new in appearance. For the correct operation of the Bluetooth module and accurate measurements, high-quality alkaline batteries are required. AAA.
Once the insulator is removed and fresh batteries are installed (if not included), the scales must be turned over and placed on a flat, hard surface; carpeting, soft-base linoleum or sloping floors can cause incorrect calibration; the sensors must evenly distribute the weight of the case to ensure that the self-diagnosis system is successful.
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Use only high-quality Duracell or Energizer batteries. Cheap salt cells may not give off the current needed to first turn on a Bluetooth module.
Algorithm of activation and calibration of sensors
The process of switching on Xiaomi scales is implemented through a system of strain gauges that respond to pressure changes. To wake the device, you can not just touch it with your finger — it requires a weight comparable to the weight of a person or at least a significant part of the body. Stand on the platform with one foot or fully to activate all four sensors at the same time.
When the first switch on the scales will light up the brand logo or bar display, indicating that the self-testing. If the screen lit and went out, showing zeros or dashes, then the device is ready to go. In some models, such as Xiaomi Mi Scale 2, for the initial activation may require a light tap on the surface or a short press on the hidden button in the battery compartment, if one is provided by the design.
- 👣 Stand on the scales with two legs, spreading the weight evenly.
- 🔋 Make sure the batteries are set to the correct polarity (+ and -).
- 🧱 Set the scales on a hard floor (tiles, laminate, parquet).
- ⏳ Wait for the logo or numbers to appear on the display.
Once activated successfully, the scales can blink several times and go into standby mode. This is normal energy-saving behavior. Now the device is ready to pair with a smartphone. If the screen does not light up at all, check again the contacts of the batteries - sometimes oxidation or poor contact of the springs requires a small wiring of the batteries in the socket.
☑️ Primary activation
Specificity of the work of different models Xiaomi
The scales range from the Chinese giant is diverse, and each model has its own inclusion features.The basic version of the Mi Smart Scale (often referred to as the "first") is activated by simply standing on a platform, but does not have a bioimpedance measurement function, so it does not require touching metal electrodes to turn on.More advanced models such as the Mi Body Composition Scale 2 require the feet to touch metal plate electrodes to transmit low current and measure body composition.
Models with USB-The charging that appears in the new revisions may behave differently if the battery is completely drained. 15-30 Unlike battery scales, they don't wake up instantly when a lithium battery is deep.
| Model of weights | Type of food | Feature of inclusion | Indication |
|---|---|---|---|
| Mi Smart Scale (1) | 4 x AAA | Automatic. | LED points |
| Mi Body Composition 2 | 4 x AAA | Touching electrodes | LED matrix |
| Mi Smart Scale 2 | 4 x AAA | Automatic. | Hidden LED |
| Xiaomi Scale 2 (USB) | Li-ion (USB) | It requires a charge. | LED display |
Owners of Pro series or precision-enhanced versions should know that their sensors are more sensitive to vibrations. When installing such scales on the floor, it is important to avoid drafts and vibrations from household appliances, as this can prevent the transition from sleep to work. High-precision sensors can block the onset if they detect platform instability.
Why do the scales turn on themselves?
Compatibility with Mi Fit and Zepp Life
By itself, turning on the scales is only half the battle. To work properly and preserve the weighing history, you need to link the device to the smartphone. Xiaomi scales do not have their own input screen, so all the analytics takes place in the Zepp Life app (formerly Mi Fit) or Mi Home. The pairing process is possible only after the scales have successfully switched on and entered the device search mode.
To connect, open the app on your smartphone, make sure Bluetooth is on, and click "Add device." At which point stand on the scales to activate and become searchable. The app may request confirmation by flashing the indicator on the scales - stand on them again to confirm pairing.
⚠️ Note: Do not try to connect scales through the standard Bluetooth menu settings Android or iOS. the pairing must occur strictly within the application, otherwise the scales will be visible as an abstract device without functionality.
If the scales are not detected, try restarting Bluetooth on the phone or restarting the app itself. Sometimes removing the device from the list of "My devices" in the application and re-associating it helps. The BLE (Bluetooth Low Energy) protocol used in the scales can lose connection if a bad signal or conflict of software versions.
Diagnosis: what to do if the scales are not included
When scales refuse to respond to your actions, it is rare, but requires a systematic approach. First of all, eliminate the human factor: replace the batteries with the known serviceable, even if the old ones look working. The voltage under the load of old cells can fall below the critical threshold of 1.3-1.4 Volts necessary to start the microcontroller.
The second common cause is oxidation of the contacts inside the battery compartment. Wipe the contacts with a cotton swab dipped in alcohol, and bend the spring contacts slightly upwards for better pressing. If the scales were in a wet room, moisture could condense inside, causing short circuits or corrosion of the board.
- 🔍 Check the integrity of the wires going from battery to board (relevant to the USB model).
- 🧹 Clean the bottom of the scales of dust and pile covering sensors.
- 🔨 Easily tap the body on your palm to eliminate possible sticking buttons (if any).
- ❄️ Allow the device to warm up if it was in a cold room (condensate).
In rare cases, software failure is possible, in which the scales “hang” For some models, there is a combination of buttons to reset (for example, simultaneously pressing the reset button in the hole and inserting batteries), but most often it helps just to remove the batteries for 10-15 minutes to completely discharge the capacitors.
Accuracy setting and error elimination
Once successfully switched on, it's important to make sure the scales are correct. 100-200 grams is considered normal for household models, but if the range is large, recalibration is required. Stand on the scale, wait for the weight to be fixed, go off and repeat the procedure 3-4 times. The readings should stabilize.
If the scales show different weights when weighing again without going off the platform, the geometry of the body may be broken or one of the four strain gauges damaged. The temperature also affects the accuracy: cold scales can give an error, so let them lie in the room for 20-30 minutes after applying from the cold.
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If the scales consistently show the same number with a deviation, use them to track dynamics, not absolute weight.
For professional calibration, you can use a reference load (for example, a dumbbell with a known weight), but in everyday conditions, it is enough to monitor the stability of the readings in the same place. Do not move the scales often - each transfer requires a new calibration "zero", which the device performs automatically, but it is better to let it stand for 5-10 minutes after the reshuffle.