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: http://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: Not publicly available
23 <<
24 <<
25 <<
26 * Sensirion SHTC3 <<
27 <<
28 Prefix: 'shtc3' <<
29 <<
30 Addresses scanned: none <<
31 <<
32 Datasheet: https://www.sensirion.com/file/ <<
33 23
34 24
35 25
36 Author: 26 Author:
37 27
38 Johannes Winkelmann <johannes.winkelmann@sens 28 Johannes Winkelmann <johannes.winkelmann@sensirion.com>
39 29
40 Description 30 Description
41 ----------- 31 -----------
42 32
43 This driver implements support for the Sensiri !! 33 This driver implements support for the Sensirion SHTC1 chip, a humidity and
44 chips, a humidity and temperature sensor. Temp !! 34 temperature sensor. Temperature is measured in degrees celsius, relative
45 celsius, relative humidity is expressed as a p !! 35 humidity is expressed as a percentage. Driver can be used as well for SHTW1
>> 36 chip, which has the same electrical interface.
46 37
47 The device communicates with the I2C protocol. 38 The device communicates with the I2C protocol. All sensors are set to I2C
48 address 0x70. See Documentation/i2c/instantiat !! 39 address 0x70. See Documentation/i2c/instantiating-devices for methods to
49 instantiate the device. 40 instantiate the device.
50 41
51 There are two options configurable by means of 42 There are two options configurable by means of shtc1_platform_data:
52 43
53 1. blocking (pull the I2C clock line down whil 44 1. blocking (pull the I2C clock line down while performing the measurement) or
54 non-blocking mode. Blocking mode will guara 45 non-blocking mode. Blocking mode will guarantee the fastest result but
55 the I2C bus will be busy during that time. 46 the I2C bus will be busy during that time. By default, non-blocking mode
56 is used. Make sure clock-stretching works p 47 is used. Make sure clock-stretching works properly on your device if you
57 want to use blocking mode. 48 want to use blocking mode.
58 2. high or low accuracy. High accuracy is used 49 2. high or low accuracy. High accuracy is used by default and using it is
59 strongly recommended. 50 strongly recommended.
60 51
61 sysfs-Interface 52 sysfs-Interface
62 --------------- 53 ---------------
63 54
64 temp1_input 55 temp1_input
65 - temperature input 56 - temperature input
66 humidity1_input 57 humidity1_input
67 - humidity input 58 - humidity input
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