Meet the incredibly adorable, palm-sized Bluetooth sensor that keeps tabs on your room's temperature and humidity. Measuring just 43mm x 43mm, its compact size and minimalist design are truly appealing. The shell is crafted from durable ABS material, and it features a 1.5 - inch (28x28mm) LCD display up front. These sensors are designed to work seamlessly with the Mijia 'Mi Home' App (available for both iOS and Android), offering an affordable way to sense the environment up to about 10 meters away. It's a great addition to general home automation and sensing projects. The sensor has two modes. In advertising mode, it sends out encrypted sensor data every few minutes. You can also connect to it as a BLE device to read the un - encrypted sensor characteristic. It's compatible with our library for the LYWSD03MMC that works with CircuitPython. You can even customize it by adding your own firmware to remove advertisement encryption. With ESPHome / Home Assistant, you can extract the binding key. It comes with 1 x CR2032 coin cell battery and a back adhesive sticker, so you can place the sensor anywhere you like. The temperature range is 0ºC - 60ºC, and the humidity range is 0% - 99% RH. Product dimensions are 43.0mm x 43.0mm x 12.5mm (1.7 inches x 1.7 inches x 0.5 inches), and it weighs 21.0g (0.7oz).
Using this Mijia temperature and humidity sensor is a breeze. First, insert the provided CR2032 coin cell battery into the sensor. Then, use the back adhesive sticker to place the sensor in the area where you want to monitor temperature and humidity. Next, download the Mijia 'Mi Home' App on your iOS or Android device and pair the sensor with the app. You can view the temperature and humidity data right on your phone. There are two ways to get data from the sensor. You can let it run in advertising mode, but keep in mind the data is encrypted. Or, connect to it as a BLE device to get un - encrypted data. When using it with our library for the LYWSD03MMC and CircuitPython, follow the library's instructions. If you want to hack it and add custom firmware, make sure you know what you're doing. For ESPHome / Home Assistant, extract the binding key as described. As for maintenance, keep the sensor away from water and extreme temperatures. If the battery runs out, simply replace it with a new CR2032 coin cell battery.
