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505c2549 NSV |
1 | .. SPDX-License-Identifier: GPL-2.0 |
2 | ||
3 | Kernel driver sht4x | |
4 | =================== | |
5 | ||
6 | Supported Chips: | |
7 | ||
8 | * Sensirion SHT4X | |
9 | ||
10 | Prefix: 'sht4x' | |
11 | ||
12 | Addresses scanned: None | |
13 | ||
14 | Datasheet: | |
15 | ||
16 | English: https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/2_Humidity_Sensors/Datasheets/Sensirion_Humidity_Sensors_SHT4x_Datasheet.pdf | |
17 | ||
18 | Author: Navin Sankar Velliangiri <navin@linumiz.com> | |
19 | ||
20 | ||
21 | Description | |
22 | ----------- | |
23 | ||
24 | This driver implements support for the Sensirion SHT4x chip, a humidity | |
25 | and temperature sensor. Temperature is measured in degree celsius, relative | |
26 | humidity is expressed as a percentage. In sysfs interface, all values are | |
27 | scaled by 1000, i.e. the value for 31.5 degrees celsius is 31500. | |
28 | ||
29 | Usage Notes | |
30 | ----------- | |
31 | ||
32 | The device communicates with the I2C protocol. Sensors can have the I2C | |
33 | address 0x44. See Documentation/i2c/instantiating-devices.rst for methods | |
34 | to instantiate the device. | |
35 | ||
36 | Sysfs entries | |
37 | ------------- | |
38 | ||
39 | =============== ============================================ | |
40 | temp1_input Measured temperature in millidegrees Celcius | |
41 | humidity1_input Measured humidity in %H | |
42 | update_interval The minimum interval for polling the sensor, | |
43 | in milliseconds. Writable. Must be at least | |
44 | 2000. | |
276281b8 | 45 | =============== ============================================ |