Why you need a Xiaomi weather station and what’s inside the box
Weather stations from Xiaomi (MiJia or Aqara series) have long ceased to be exotic – they help to monitor the climate in the house, control the level of the weather. CO₂, But many users face the first challenge in the unpacking phase: how to open the case properly without damaging the sensors or the battery compartment? In this article, we'll look at the process from A to Z, including hidden nuances that are not mentioned in the official instructions.
In the box with the Xiaomi weather station you will find:
- 📦 The weather station itself (main unit with or without a display, depending on the model).
- 🔋 Removable power cell (usually batteries) AAA battery-power).
- 📄 A brief guide in Chinese/English (often without translations into Russian).
- 🔌 USB-Type-C cable (if the model supports charging or PC connection).
- 🧲 Fortress elements (for wall options, for example, Aqara) TVOC).
Important: Some models (e.g., MiJia LYWSD03MMC) come with a protective film on the sensors that must be removed before first switching on, and if left alone, the temperature and humidity readings will be incorrect.
How to physically open the body of the weather station: Step-by-step
The main difficulty is access to the battery compartment or slot for SIM-maps (in models with data transmission on the GSM). The manufacturer often hides the mounts under the stickers or uses non-obvious mechanisms:
- Turn the weather station down with the display: 🔹 Puzzle for coin (in models with batteries) CR2032). 🔹 Two clips on the sides (carefully tuck them in with a plastic card). 🔹 Screwdriver screws (found in Aqara).
- If the lid doesn't lend itself, don't use force, because there may be fragile sensor contacts inside: 🔥 Heat the body with a hair dryer (if it is glued together). 🧊 Place in the freezer for 10 minutes (for plastic latches).
- Check it out after opening: 🔋 Batteries (sometimes not installed from the factory). 📶 Antenna (in models with LoRa or Zigbee).
☑️ What to check after opening the case
Warning: In Xiaomi MiJia LYWSD03MMC weather stations, if you open it sloppy, you can damage the piezoelectric pressure sensor. It looks like a small metal box with a hole — don't touch it with your fingers or tools.
What to do if the lid does not open?
Installation of batteries and first incorporation
Even if Xiaomi weather station has a built-in battery, many models require initial battery installation to calibrate the sensors.
| Model weather station | Type of battery | Features of installation |
|---|---|---|
| MiJia LYWSD03MMC | CR2032 ×1 | The battery is inserted with the contacts up. After installation, hold the reset button for 5 seconds. |
| Aqara TVOC | AAA ×2 | Polarity is indicated on the compartment cover. After switching on, wait 10 minutes for the sensor to be calibrated. CO₂. |
| Mi Temperature 2 | CR2032 ×1 | No power button – activates automatically after the battery is installed. |
If the weather station is not switched on:
- 🔋 Check the polarity of the batteries (even if they are new).
- 🔌 Try to connect to the USB (if there is a port).
- 📡 Make sure there are no interference sources nearby (microwaves, routers at 2.4 GHz).
💡
If the MiJia flashes red after the battery is installed, it means a sensor error. Try to remove the battery for 30 seconds and re-insert it.
Connect to the Mi Home or Aqara app
Without syncing with the official app, the weather station will work like a regular thermometer. To access data history, notifications, and integration with other Xiaomi devices, follow the steps:
- Download the app: 📱 Mi Home (for MiJia models). 📱 Aqara Home (for Aqara devices).
Sign up or log in. Important: link the device to the mainland region of China (it has more features than Russia).
Click + → Add device → Meteor station and select your model. If it is not on the list, try the "Other" option.
Hold your phone to the weather station and wait for the beep. In some models, you need to press a button on the case (usually it is hidden under the lid).
Critical detail: Xiaomi weather stations with a sensor CO₂ (for example, Aqara TVOC) Without this, carbon dioxide readings will be inaccurate for the first 24 hours.
💡
If the weather station is not an app, try resetting it to factory settings: hold the reset button (usually on the back) for 10-15 seconds until the indicator flashes yellow.
Set up notifications and automatic scripts
The main advantage of Xiaomi weather stations is the ability to automate climate control, for example, you can configure:
- 🌡️ Including the humidifier at humidity below 40%.
- 💨 Ventilation, if the level CO₂ exceeds 1,000 ppm.
- 🔥 Phone alert at temperatures above 30°C.
How to do this:
- Open the Mi Home app → Select your weather station → Automation.
- Click Add Script and select a condition (e.g., "Temperature > 28°C").
- Add action: Send notification, enable another device (e.g. Xiaomi Smart Fan).
- Save the scenario and test it by bringing the weather station to a heat source (such as a battery).
For advanced users: You can integrate a weather station with Home Assistant via Zigbee or BLE protocol (this will require a gateway such as Xiaomi Gateway or Sonoff Zigbee Bridge).
Common Mistakes and How to Avoid Them
Even after successful connectivity, users face challenges.-5 mistakes and their solutions:
⚠️ Note: If the weather station shows humidity 99% temperature -40°C, that means a sensor break, and most often, the oxidized contact pad is to blame -- clean it carefully with a swallow.
| Problem. | Reason. | Decision |
|---|---|---|
| Testimonies. CO₂ overstated | Sensor's not calibrated. | Place the weather station in the open air for 20 minutes |
| No settings are saved. | Weak Wi-Fi/Zigbee signal | Move the gateway closer to the device |
| Fast battery discharge | Frequent sensor surveys | Increase the refresh interval in the application settings |
Another typical situation is that the MiJia weather station stops sending data to the application after 2-3 months, and this involves filling up internal memory (the device stores the history locally).
- Remove the battery for 1 minute.
- Connect the weather station again via Mi Home.
- In the device settings, disable the option "Local data storage" (if any).
Integration with other smart home systems
Xiaomi weather stations can be connected not only to native applications, but also to third-party platforms:
- 🏠 Home Assistant: Through Xiaomi Component BLE or Zigbee2MQTT (lock).
- 🌐 Google Home: Cloud sync with Mi Home (requires a Xiaomi account).
- 🍎 Apple HomeKit: Using the HomeBridge Bridge (setting up requires knowledge) JSON).
Example of code for Home Assistant (for weather station LYWSD03MMC):
sensor:
- platform: mqtt
name: "Xiaomi Temperature"
state_topic: "zigbee2mqtt/0x12345678/temperature"
unit_of_measurement: "°C"Important: When integrated via Zigbee, the weather station will update data more often (every 1-5 minutes vs. 30 minutes in the Mi Home cloud), but you will need a stable gateway.