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- .. SPDX-License-Identifier: GPL-2.0
- 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
- Documentation/i2c/instantiating-devices.rst 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.
- =============== ============================================
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