| .. 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 |
| |
| 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 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. |
| =============== ============================================ |
