Kernel driver aht10

Supported chips:

• Aosong AHT10/AHT20

  Prefix: ‘aht10’

  Addresses scanned: None

  Datasheet(AHT10):

  Chinese: http://www.aosong.com/userfiles/files/media/AHT10%E4%BA%A7%E5%93%81%E6%89%8B%E5%86%8C%20A3%2020201210.pdf English: https://server4.eca.ir/eshop/AHT10/Aosong_AHT10_en_draft_0c.pdf

  Datasheet(AHT20):

  English: http://www.aosong.com/userfiles/files/media/Data%20Sheet%20AHT20.pdf

• Aosong DHT20

  Prefix: ‘dht20’

  Addresses scanned: None

  Datasheet: https://www.digikey.co.nz/en/htmldatasheets/production/9184855/0/0/1/101020932

Author: Johannes Cornelis Draaijer <jcdra1@gmail.com>

Description

The AHT10/AHT20 is a Temperature and Humidity sensor

The address of this i2c device may only be 0x38

Special Features

AHT20, DHT20 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

temp1_input	Measured temperature in millidegrees Celsius
humidity1_input	Measured humidity in %H
update_interval	The minimum interval for polling the sensor, in milliseconds. Writable. Must be at least 2000.