1.. SPDX-License-Identifier: GPL-2.0 2 3Kernel driver aht10 4===================== 5 6Supported chips: 7 8 * Aosong AHT10/AHT20 9 10 Prefix: 'aht10' 11 12 Addresses scanned: None 13 14 Datasheet(AHT10): 15 16 Chinese: http://www.aosong.com/userfiles/files/media/AHT10%E4%BA%A7%E5%93%81%E6%89%8B%E5%86%8C%20A3%2020201210.pdf 17 English: https://server4.eca.ir/eshop/AHT10/Aosong_AHT10_en_draft_0c.pdf 18 19 Datasheet(AHT20): 20 21 English: http://www.aosong.com/userfiles/files/media/Data%20Sheet%20AHT20.pdf 22 23 * Aosong DHT20 24 25 Prefix: 'dht20' 26 27 Addresses scanned: None 28 29 Datasheet: https://www.digikey.co.nz/en/htmldatasheets/production/9184855/0/0/1/101020932 30 31Author: Johannes Cornelis Draaijer <jcdra1@gmail.com> 32 33 34Description 35----------- 36 37The AHT10/AHT20 is a Temperature and Humidity sensor 38 39The address of this i2c device may only be 0x38 40 41Special Features 42---------------- 43 44AHT20, DHT20 has additional CRC8 support which is sent as the last byte of the sensor 45values. 46 47Usage Notes 48----------- 49 50This driver does not probe for AHT10/ATH20 devices, as there is no reliable 51way to determine if an i2c chip is or isn't an AHT10/AHT20. The device has 52to be instantiated explicitly with the address 0x38. See 53Documentation/i2c/instantiating-devices.rst for details. 54 55Sysfs entries 56------------- 57 58=============== ============================================ 59temp1_input Measured temperature in millidegrees Celsius 60humidity1_input Measured humidity in %H 61update_interval The minimum interval for polling the sensor, 62 in milliseconds. Writable. Must be at 63 least 2000. 64=============== ============================================ 65