AHT20 Temperature & Humidity for Python I2C

Standadone communication driver for the AHT20 Temperature & Humidity sensor, running on a Raspberry Pi on Python.

• Board
• Datasheet

Pinout

The AHT20 sensor is connected to the Rasperry Pi via the following pins:

Pin #	Pin Name	Connection
1	3.3v	Voltage in
3	GPIO2	I2C SDA
5	GPIO3	I2C SDL
9	GND	Ground

The Raspberry Pi GPIO pinout map can be viewed here.

Pre-requistes

• Raspberry Pi, but could run elsewhere
• On the machine: python3-smbus installed
• On Python: smbus2 installed

Notes

• The I2C bus is 1 by default, as it's the default one for the Raspberry Pi. Another bus can be specified with the BusNum variable when calling the module.

Authors

• Chouffy for the original module
• Zifeng1997 for the CRC8 checker

Sources

• Adafruit original driver with CircuitPython