1. Introducció
This manual provides comprehensive instructions for the setup, operation, and maintenance of your Xiaomi Mijia Bluetooth Thermometer 3. This smart device is designed to accurately monitor and display real-time temperature and humidity levels in your environment, offering insights into indoor climate conditions. Please read this manual thoroughly before using the product to ensure proper functionality and longevity.
2. Producte acabatview
The Xiaomi Mijia Bluetooth Thermometer 3 is a compact, digital device equipped with a high-precision sensor to measure ambient temperature and humidity. It features a clear LCD display for immediate readings and Bluetooth connectivity for integration with the Mi Home application, allowing for data logging, remote monitoring, and smart home automation.

Figura 2.1: Frontal view of the Xiaomi Mijia Bluetooth Thermometer 3, displaying temperature, time, and humidity.
3. Característiques clau
- Sensor d'alta precisió: Built-in industrial-grade Swiss Sensirion digital temperature and humidity sensor for accurate measurements.
- Monitorització en temps real: Provides instant temperature and humidity readings on its clear LCD display.
- Connectivitat Bluetooth: Connects to the Mi Home app for remote viewing, data history, and smart scene creation.
- Indicador de confort: Features an intuitive emoticon display to indicate comfort levels based on temperature and humidity.
- Col·locació versàtil: Designed for both vertical placement on surfaces and hanging on walls.
- Llarga vida útil de la bateria: Optimized for extended operation on a single battery.

Figure 3.1: Illustration of the device's high-precision sensor capabilities.
4. Guia de configuració
4.1. Instal·lació de la bateria
- Localitzeu la tapa del compartiment de la bateria a la part posterior del dispositiu.
- Feu lliscar suaument o obriu la coberta fent palanca.
- Insert one CR2032 button cell battery, ensuring the positive (+) side faces upwards.
- Replace the battery compartment cover securely. The device display should activate.
4.2. App Pairing (Mi Home App)
To unlock full smart features, connect your thermometer to the Mi Home app.
- Descarrega't el La meva Casa app from your device's app store (Google Play Store for Android, Apple App Store for iOS).
- Open the Mi Home app and log in or create a new account.
- Assegureu-vos que el Bluetooth del vostre telèfon intel·ligent estigui activat.
- A l'aplicació Mi Home, toca "+" icona a la cantonada superior dreta per afegir un dispositiu nou.
- The app should automatically detect nearby Xiaomi devices. Select "Xiaomi Mijia Bluetooth Thermometer 3" from the list. If not detected, you may need to manually search for it or reset the device (refer to Troubleshooting).
- Follow the on-screen prompts to complete the pairing process. This may involve pressing a button on the thermometer or confirming a code.
- Once paired, you can name your device and assign it to a specific room within the app.
5. Instruccions de funcionament
5.1. Mostra informació
La pantalla LCD mostra la informació següent:
- Temperatura: Large digits, typically in Celsius (°C).
- Humitat: Percenttage (%).
- Hora/Data: Hora i data actuals.
- Indicador de confort: An emoticon (e.g., happy face, neutral face, sad face) indicating the comfort level based on combined temperature and humidity.
- Icona Bluetooth: Indica una connexió Bluetooth activa.
- Indicador de bateria: Mostra la durada restant de la bateria.

Figure 5.1: Device displaying readings while mounted on a wall.
5.2. Using with Mi Home App
Once paired, the Mi Home app provides enhanced functionality:
- Monitorització remota: View real-time temperature and humidity from anywhere with an internet connection.
- Dades històriques: Access graphs and logs of temperature and humidity changes over time.
- Automatització intel·ligent: Set up automated scenes with other Xiaomi smart devices (e.g., turn on a humidifier if humidity drops below a certain level).
- Alertes: Receive notifications if temperature or humidity goes outside predefined ranges.

Figura 5.2: Example of smart linkage with a Xiaomi AI speaker for voice queries.
6. Manteniment
- Neteja: Wipe the device gently with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water.
- Substitució de la bateria: Replace the CR2032 battery when the low battery indicator appears on the display or in the app. Dispose of used batteries responsibly.
- Condicions ambientals: Avoid exposing the device to extreme temperatures, direct sunlight, or high humidity environments (e.g., directly in a shower).
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Device not turning on / Display blank | La bateria està morta o mal instal·lada. | Check battery orientation. Replace with a new CR2032 battery. |
| Cannot pair with Mi Home app | Bluetooth is off; device is out of range; app region lock; device already paired. | Ensure Bluetooth is on. Bring device closer to phone. Verify your Mi Home app region setting matches the device's intended region (e.g., China Mainland). Try resetting the device (if a reset button exists, otherwise remove/reinsert battery). Ensure the device is not already paired to another account. |
| Inaccurate readings / Readings fluctuate rapidly | Device placed in an unsuitable location (e.g., near heat source, draft, direct sunlight, high humidity); sensor obstruction; rapid environmental changes. | Relocate the device to a stable environment away from direct influences. Allow time for readings to stabilize. Ensure sensor vents are not blocked. Note that rapid fluctuations can occur if the device is moved or exposed to sudden changes in air flow. |
| La connexió Bluetooth cau amb freqüència | Interference; device too far from phone/gateway; low battery. | Reduce distance between device and phone/Bluetooth gateway. Check for other interfering wireless devices. Replace battery. |
8. Especificacions
- Model: MJWSD05MMC
- Rang de mesura de temperatura: 0°C to 60°C (32°F to 140°F) (Typical, refer to product packaging for exact range)
- Interval de mesura de la humitat: 0% RH to 99% RH (Typical, refer to product packaging for exact range)
- Resolució de temperatura: 0.1 °C
- Resolució d'humitat: 1% HR
- Connectivitat sense fils: Bluetooth de baix consum (BLE)
- Tipus de bateria: CR2032 button cell (1 included)
- Dimensions: Approximately 43 x 43 x 12.5 mm (Based on typical compact thermometer size)
- Pes: Approximately 21g (Excluding battery)
- Fabricant: Xiaomi
- País d'origen: Xina
Note: Specifications are subject to change without notice. Please refer to the product packaging for the most accurate and up-to-date information.
9. Garantia i Suport
Els productes Xiaomi estan coberts per una garantia limitada. Per conèixer els termes i condicions detallats de la garantia, consulteu la targeta de garantia inclosa amb el producte o visiteu el lloc web oficial de Xiaomi. weblloc.
Per a assistència tècnica, assistència per a la resolució de problemes o consultes de servei, poseu-vos en contacte amb el servei d'atenció al client de Xiaomi a través del seu servei oficial. website or authorized service centers in your region. Keep your purchase receipt as proof of purchase for warranty claims.
Xiaomi oficial Weblloc: www.mi.com





