GY-21 Temperature and Humidity Sensor Module

Gy-21 is a reliable and durable module for determining temperature and humidity. 

Thanks to the I2C interface, the sensor is compatible with most 3.3V and 5V microcontrollers such as Arduino, ESP and Raspberry and programming is easy.
Additionally, free libraries are available for easy use with Arduinos and Raspberrys.
The sensor breakout is equipped with the original HTU21D chip and represents a real alternative to the well-known DHT22. 
️ Widely used module popular in the community
️ Used in many weather stations
️ Typical measurement accuracy Temperature: +/-1°C Deviation between -30°C and 90°C
️ Typical measurement accuracy Humidity: +/-2% RL between 5% and 95% RL