The Si7021 is a low-cost, easy to use, highly accurate, digital temperature and humidity sensor. All you need is two lines for I2C communication, and you’ll have relative humidity readings and accurate temperature readings as well! This sensor is ideal for environmental sensing and data logging, perfect for a weather station or humidor control system. This module can be used with popular libraries for Arduino such as Adafruit_HTU21DF or SparkFun_HTU21D.

Specification:
- Input Voltage: 3.3V to 5V
- Interface: I2C

Operational Range:
- Temperature: -40 to +125°C
- Humidity: 0-100%

Accuracy:
- Temperature: ±0.3°C
- Humidity: ±2%

Package Contents:
- 1x SI7021 Sensor Module
- 1x 4-pin 2.54mm straight header