1 .. SPDX-License-Identifier: GPL-2.0 2 3 Kernel driver aht10 4 ===================== 5 6 Supported 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 Author: Johannes Cornelis Draaijer <jcdra1@gmail.com> 24 25 26 Description 27 ----------- 28 29 The AHT10/AHT20 is a Temperature and Humidity sensor 30 31 The address of this i2c device may only be 0x38 32 33 Special Features 34 ---------------- 35 36 AHT20 has additional CRC8 support which is sent as the last byte of the sensor 37 values. 38 39 Usage Notes 40 ----------- 41 42 This driver does not probe for AHT10/ATH20 devices, as there is no reliable 43 way to determine if an i2c chip is or isn't an AHT10/AHT20. The device has 44 to be instantiated explicitly with the address 0x38. See 45 Documentation/i2c/instantiating-devices.rst for details. 46 47 Sysfs entries 48 ------------- 49 50 =============== ============================================ 51 temp1_input Measured temperature in millidegrees Celsius 52 humidity1_input Measured humidity in %H 53 update_interval The minimum interval for polling the sensor, 54 in milliseconds. Writable. Must be at 55 least 2000. 56 =============== ============================================
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