Reference
Last revision 2025/12/16
The article offers a comprehensive overview of the SHT20 I2C temperature and humidity sensor, highlighting its enhanced reliability and waterproof design, along with guidance on library installation in Arduino IDE for precise environmental measurements.
Library
Download the DFRobot Arduino SHT20 library
How to install Libraries in Arduino IDE
Communication Protocol Description
The sensor uses I2C / IIC communication interface.
Principle
The SHT20 I2C temperature & humidity sensor adopt Sensirion new technique. Besides the capacitive type humidity sensor and the band gap temperature sensor, the chip contains an amplifier, A/D converter, OTP memory and a digital processing unit. To compare with early SHT1x series and SHT7x series, SHT20 shows better reliability and long-term stability. It can measure surrounding environment temperature and relative air humidity precisely.
Other Supplementary Information
The Arduino SHT20 waterproof temperature & humidity sensor adopts dual waterproof protection. The inner PCB has perfusion and encapsulation protection, and the probe enclosure is made of PE waterproof materials. This is a special waterproof breathable material that allows water molecules to seep in, blocking water droplets from seeping in. The sensor won't be damaged even if it is submerged in water for a long time. There is a built-in 10k Pull-up resistor and 0.1uf filter capacitor, so It can be used directly with the microcontroller such as Arduino. Recommend DFRobot Gravity 4Pin Sensor Adapter, it is quite convenient.
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