GCM00L5 is a small Humidity and Temperature Sensor reference design, the sensor detects the current ambient air temperature and relative humidity, and has an electronic ink screen display panel, making it easier for users to read the current environment value.  This design uses low-power MCU (MSPM0L1306), low-power humidity and temperature  sensor (HDC2080) display module as the electronic ink screen, to ensure the use of a 3V standard button battery (CR2032/220maH) can be used for more than 18 months.