Hi all.
I hooked up my sensirion SHT20 temp/humid sensor to my BBB.
http://www.sensirion.com/en/products/humidity-temperature/humidity-sensor-sht20/
-SHT20- -BBB-
GND ---> P9-01
VDD ---> P9-03
SCL ---> P9-19
SDA ---> P9-20
The datasheet says the address is 01000000 (0x40).
> 5.3 Sending a Command
> After sending the Start condition, the subsequent I2C
> header consists of the 7-bit I2C device address ‘1000’000’
> and an SDA direction bit (Read R: ‘1’, Write W: ‘0’).
> The wiring is like the following.
I expected to appear the sensor on I2C-1's address 0x40.
But it isn't detected:
$ sudo i2cdetect -r -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- UU UU UU UU -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
and also
$ sudo i2cdetect -r -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: UU -- -- -- -- -- -- --
I checked the sensor worked as a normal I2C device on my Arduino.
Do I need to install some drivers on BBB for the sensor?
Or do I missed some procedures?
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