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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>
47 lines
1.2 KiB
ReStructuredText
47 lines
1.2 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
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Kernel driver aht10
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=====================
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Supported chips:
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* Aosong AHT10
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Prefix: 'aht10'
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Addresses scanned: None
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Datasheet:
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Chinese: http://www.aosong.com/userfiles/files/media/AHT10%E4%BA%A7%E5%93%81%E6%89%8B%E5%86%8C%20A3%2020201210.pdf
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English: https://server4.eca.ir/eshop/AHT10/Aosong_AHT10_en_draft_0c.pdf
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Author: Johannes Cornelis Draaijer <jcdra1@gmail.com>
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Description
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-----------
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The AHT10 is a Temperature and Humidity sensor
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The address of this i2c device may only be 0x38
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Usage Notes
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-----------
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This driver does not probe for AHT10 devices, as there is no reliable
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way to determine if an i2c chip is or isn't an AHT10. The device has
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to be instantiated explicitly with the address 0x38. See
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Documentation/i2c/instantiating-devices.rst for details.
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Sysfs entries
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-------------
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=============== ============================================
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temp1_input Measured temperature in millidegrees Celcius
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humidity1_input Measured humidity in %H
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update_interval The minimum interval for polling the sensor,
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in milliseconds. Writable. Must be at
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least 2000.
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=============== ============================================
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