The HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor.
This sensor is ideal for environmental sensing and data logging and perfect for a weather stations for humidity control systems.
All you need is two lines for I2C communication and you’ll have relative humidity readings and very accurate temperature readings as a bonus!
Voltage: 2.1V to 3.6V
Low power consumption: -0.15uA
Resolution: 0.04%RH, 0.02°C
Accuracy: ±2%RH, ±3°C
Size: 21 x 16mm
1 x GY-21 HTU21 Sensor Module