Xiaomi's Bluetooth Thermometers: affordable, sleek, and hackable?
Three of Xiaomi's Bluetooth thermometers and hygrometers can be hacked and flashed with custom firmware.
Qingping Digital Thermometer Hygrometer Lite (CGDK2)
The Qingping Digital Thermometer Hygrometer Lite (CGDK2) is a highly accurate and efficient indoor temperature and humidity monitor. It features a segment LCD screen for easy reading of measurements and has ultra-low power consumption. The device utilizes a Swiss-made built-in sensor that ensures fast, sensitive, and precise readings, with a temperature range of 14 ~ 122 °F (-9.9 ~ 50 °C), and a humidity range of 0% ~ 99.9%RH. A button on the product's back allows users to switch between Fahrenheit and Celsius. It can be conveniently placed on a wall, desktop or any iron surface, thanks to the supplied wall sticker, stand, and the built-in magnet. The product comes with a CR2430 button cell and boasts 8 ~ 12 months of battery life in typical indoor environments.
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