This is an Arduino library for SHT21, HTU21D & Si70xx Digital Humidity and Temperature Sensor

Supports all sensors features:

• read humidity for SHT21, HTU21D or compensated humidity for Si70xx**
• calculate compensated humidity for SHT21, HTU21D**
• read temperature for SHT21, HTU21D, Si70xx or retrive temperature value after RH measurement for Si70xx**
• soft reset
• check battery status
• turn ON/OFF build-in Heater
• read FW version**
• read sensor ID**

Tested on:

• Arduino AVR
• Arduino ESP8266
• Arduino STM32

**Library returns 255, if there is a CRC8 mismatch or a communication error has occurred