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22548bdf UH |
1 | ------------------------------------------------------------------------------- |
2 | Sensirion SHT2x | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This is a set of dumps of a Sensirion SHT2x temperature/humidity sensor. | |
6 | ||
7 | For details see: | |
8 | https://www.sensirion.com/en/products/humidity-sensors/humidity-temperature-sensor-sht2x-digital-i2c-accurate/ | |
9 | https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/2_Humidity_Sensors/Sensirion_Humidity_Sensors_SHT21_Datasheet_V4.pdf | |
10 | ||
11 | ||
12 | Logic analyzer setup | |
13 | -------------------- | |
14 | ||
15 | The logic analyzer used was a USBee SX (at 8 MHz): | |
16 | ||
17 | Probe SHT2x | |
18 | ----------------- | |
19 | 1 SDA | |
20 | 2 SCL | |
21 | ||
22 | ||
082fca80 KP |
23 | sensirion_sht21_humidity35.sr |
24 | ----------------------------- | |
22548bdf UH |
25 | |
26 | The sensor reports a humidity of ca. 35 %RH. | |
27 | ||
082fca80 KP |
28 | |
29 | i2c-sht21-100khz-read-serial-hold.sr | |
30 | ------------------------------------ | |
31 | ||
32 | This file captures reading the version and serial, as well as using | |
33 | the "temp hold" and "humidity hold" reading styles. Notice SCL held low | |
34 | by the slave. | |
35 | ||
36 | Temperature is ~23C and RH ~50% and the serial number is "e4d2 0122 d208 0131". |