1 Kernel driver shtc1 1 Kernel driver shtc1
2 =================== 2 ===================
3 3
4 Supported chips: 4 Supported chips:
5 5
6 * Sensirion SHTC1 6 * Sensirion SHTC1
7 7
8 Prefix: 'shtc1' 8 Prefix: 'shtc1'
9 9
10 Addresses scanned: none 10 Addresses scanned: none
11 11
12 Datasheet: https://www.sensirion.com/file/ 12 Datasheet: https://www.sensirion.com/file/datasheet_shtc1
13 13
14 14
15 15
16 * Sensirion SHTW1 16 * Sensirion SHTW1
17 17
18 Prefix: 'shtw1' 18 Prefix: 'shtw1'
19 19
20 Addresses scanned: none 20 Addresses scanned: none
21 21
22 Datasheet: https://www.sensirion.com/file/ 22 Datasheet: https://www.sensirion.com/file/datasheet_shtw1
23 23
24 24
25 25
26 * Sensirion SHTC3 26 * Sensirion SHTC3
27 27
28 Prefix: 'shtc3' 28 Prefix: 'shtc3'
29 29
30 Addresses scanned: none 30 Addresses scanned: none
31 31
32 Datasheet: https://www.sensirion.com/file/ 32 Datasheet: https://www.sensirion.com/file/datasheet_shtc3
33 33
34 34
35 35
36 Author: 36 Author:
37 37
38 Johannes Winkelmann <johannes.winkelmann@sens 38 Johannes Winkelmann <johannes.winkelmann@sensirion.com>
39 39
40 Description 40 Description
41 ----------- 41 -----------
42 42
43 This driver implements support for the Sensiri 43 This driver implements support for the Sensirion SHTC1, SHTW1, and SHTC3
44 chips, a humidity and temperature sensor. Temp 44 chips, a humidity and temperature sensor. Temperature is measured in degrees
45 celsius, relative humidity is expressed as a p 45 celsius, relative humidity is expressed as a percentage.
46 46
47 The device communicates with the I2C protocol. 47 The device communicates with the I2C protocol. All sensors are set to I2C
48 address 0x70. See Documentation/i2c/instantiat 48 address 0x70. See Documentation/i2c/instantiating-devices.rst for methods to
49 instantiate the device. 49 instantiate the device.
50 50
51 There are two options configurable by means of 51 There are two options configurable by means of shtc1_platform_data:
52 52
53 1. blocking (pull the I2C clock line down whil 53 1. blocking (pull the I2C clock line down while performing the measurement) or
54 non-blocking mode. Blocking mode will guara 54 non-blocking mode. Blocking mode will guarantee the fastest result but
55 the I2C bus will be busy during that time. 55 the I2C bus will be busy during that time. By default, non-blocking mode
56 is used. Make sure clock-stretching works p 56 is used. Make sure clock-stretching works properly on your device if you
57 want to use blocking mode. 57 want to use blocking mode.
58 2. high or low accuracy. High accuracy is used 58 2. high or low accuracy. High accuracy is used by default and using it is
59 strongly recommended. 59 strongly recommended.
60 60
61 sysfs-Interface 61 sysfs-Interface
62 --------------- 62 ---------------
63 63
64 temp1_input 64 temp1_input
65 - temperature input 65 - temperature input
66 humidity1_input 66 humidity1_input
67 - humidity input 67 - humidity input
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