The AHT20 is a nice but inexpensive temperature and humidity sensor from the same folks who brought us the DHT22. You can take sensor readings as often as you like, and it uses standard I2C, so it’s super easy to use with any Arduino or Linux/Raspberry Pi board.

This sensor has a typical accuracy of +- 2% relative humidity and +-0.3 °C at 20-80% RH and 20-60 °C. There is only one I2C address so it’s not a good option when you need multiple humidity sensors.

As with all Adafruit breakouts, we’ve done the work to make this handy temperature-and-humidity super easy to use. We’ve put it on a breakout board with the required support circuitry and connectors to make it easy to work with.

Features:

• Supply Voltage – 3.3V or 5V power/logic
• Accuracy of +- 2% relative humidity
• Uses standard I2C, easy to use with any Arduino or Linux/Raspberry Pi board
• Use with 3.3V or 5V power/logic
• I2C address 0x38. It cannot be changed.
• Operational Temperature range: -40 to 85 °C (+-1 °C typical accuracy over entire range)
• Operational Relative Humidity range: 0 to 100 RH% (+-3 % typical accuracy over entire range)

Package Includes:

• 1 x SmartElex AHT20 Temperature & Humidity Sensor