Qwiic Shim i2cdetect Ok but i2cget failed

Qwiic System
1

Hi,

Im using a setup with RPI3B+ with Qwiic Shim and a BH1750 light sensor which i can’t get it work…

The i2cdetect -y 1 show the right device at 0x23 as expected but :

  • sudo i2cget -y 1 0x23 : Error: Read failed :frowning:

  • Error with the adafruit circuit python for bh1750 : no I2C device at address : 23 :frowning:

I must also say that i have a bunch of sensor connected to a phat stack which are working without shim but when i plug it no i2c device can be reached (but i can see them with i2cdetect)…

Someone as a clue :?:

Thanks !

2

Is the light sensor a SparkFun breakout?

3

It’s not a Sparkfun breakout, it’s the one from adafruit (https://www.adafruit.com/product/4681)

4

Since the address is discoverable then the Shim is working as expected. However, you’ll probably want to reach out to Adafruit about their module specifically.

5

I thought that since it’s qwiic pluggable it should work out of the box but i will reach them.

I have the same behavior when i plug another sensor to the shim and when nothing is connected to shim everything works.

I will ask them for support and put the answer here later.

Thanks anyway for you help