linux-stable/Documentation/hwmon/aht10.rst
Johannes Cornelis Draaijer (datdenkikniet) 8c78f0dee4 hwmon: Add AHT10 Temperature and Humidity Sensor Driver
This patch adds a hwmon driver for the AHT10 Temperature and
Humidity sensor. It has a maximum sample rate, as the datasheet
states that the chip may heat up if it is sampled more than once
every two seconds.

Has been tested a to work on a raspberrypi0w

Signed-off-by: Johannes Cornelis Draaijer (datdenkikniet) <jcdra1@gmail.com>
Link: https://lore.kernel.org/r/20210107194014.GA88780@desktop
[groeck: dropped AHT10_ADDR (unused) and use AHT10_MEAS_SIZE where
 appropriate; dropped change log]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2021-01-27 17:44:18 -08:00

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.. SPDX-License-Identifier: GPL-2.0
Kernel driver aht10
=====================
Supported chips:
* Aosong AHT10
Prefix: 'aht10'
Addresses scanned: None
Datasheet:
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
Author: Johannes Cornelis Draaijer <jcdra1@gmail.com>
Description
-----------
The AHT10 is a Temperature and Humidity sensor
The address of this i2c device may only be 0x38
Usage Notes
-----------
This driver does not probe for AHT10 devices, as there is no reliable
way to determine if an i2c chip is or isn't an AHT10. 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 Celcius
humidity1_input Measured humidity in %H
update_interval The minimum interval for polling the sensor,
in milliseconds. Writable. Must be at
least 2000.
=============== ============================================