1 Kernel driver sht21
2 ===================
3
4 Supported chips:
5
6 * Sensirion SHT21
7
8 Prefix: 'sht21'
9
10 Addresses scanned: none
11
12 Datasheet: Publicly available at the Sensi
13
14 https://www.sensirion.com/file/datasheet_s
15
16
17
18 * Sensirion SHT25
19
20 Prefix: 'sht25'
21
22 Addresses scanned: none
23
24 Datasheet: Publicly available at the Sensi
25
26 https://www.sensirion.com/file/datasheet_s
27
28
29
30 Author:
31
32 Urs Fleisch <urs.fleisch@sensirion.com>
33
34 Description
35 -----------
36
37 The SHT21 and SHT25 are humidity and temperatu
38 only 3 x 3 mm footprint and 1.1 mm height. The
39 devices is the higher level of precision of th
40 0.2 degree Celsius) compared with the SHT21 (2
41 0.3 degree Celsius).
42
43 The devices communicate with the I2C protocol.
44 I2C address 0x40, so an entry with I2C_BOARD_I
45 in the board setup code.
46
47 sysfs-Interface
48 ---------------
49
50 temp1_input
51 - temperature input
52
53 humidity1_input
54 - humidity input
55 eic
56 - Electronic Identification Code
57
58 Notes
59 -----
60
61 The driver uses the default resolution setting
62 bit for temperature, which results in typical
63 humidity and 66 ms for temperature. To keep se
64 Celsius, the device should not be active for m
65 e.g. maximum two measurements per second at th
66
67 Different resolutions, the on-chip heater, and
68 are not supported yet.
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.