Kernel driver aht10

Supported chips:

Author: Johannes Cornelis Draaijer <>


The AHT10/AHT20 is a Temperature and Humidity sensor

The address of this i2c device may only be 0x38

Special Features

AHT20 has additional CRC8 support which is sent as the last byte of the sensor values.

Usage Notes

This driver does not probe for AHT10/ATH20 devices, as there is no reliable way to determine if an i2c chip is or isn't an AHT10/AHT20. The device has to be instantiated explicitly with the address 0x38. See How to instantiate I2C devices for details.

Sysfs entries


Measured temperature in millidegrees Celsius


Measured humidity in %H


The minimum interval for polling the sensor, in milliseconds. Writable. Must be at least 2000.