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 or humidor 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!
There are only four pins that need to be hooked up in order to start using this sensor in a project. One for VCC, one for GND, and two data lines for I2C communication.
This breakout board has built in 4.7k pull up resistors for I2C communications. If you’re hooking up multiple I2C devices on the same bus, you may want to disable these resistors.
HTU21D can be fully compatible with SHT20 and SHT21. Pin to Pin can be implemented on the hardware pins without modifying the circuit board. The software program is also the same as SHT20 and SHT21, which can be compatible and replaced without any modification.
Sensor parameters:
Power supply voltage: 1.5V-3.6V
Humidity measurement range: 0-100%RH
Temperature measurement range: -40℃—105℃
Maximum power consumption: 2.7uW
Communication method: I2C
Humidity accuracy range (10%RH to 95%RH): HTU21D±2%RH
Humidity hysteresis: ±1%RH
Measurement time: 50ms
Annual drift: -0.5%RH/year
Response time: 5 s
Board Size: 15.3× 15.3 mm
Weight：0.9
Packing List:
1 x HTU21D humidity and temperature sensor module