I2C error (Please check if the I2C device insert in I2C of Base Hat)

[duart38]

Describe the bug
I get an error when trying to run the example program which I can't seem to figure out why:

I2C error (Please check if the I2C device insert in I2C of Base Hat)

To Reproduce
Steps to reproduce the behavior:

1. Plug in sensor and run the test program (within this repo) https://wiki.seeedstudio.com/Grove-Sunlight_Sensor/

Desktop (please complete the following information):

• Device: Raspberry pi 4
• OS: Raspbian 11 (bullseye)

Additional context
I2C detection shows that the OS sees the sensor, see output:

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         08 -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- 53 -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --   

I have also tried to manually enter the address with no luck:

# .....
SI1145 = seeed_si114x.grove_si114x(0x53)
# .....

I'm using the grove hat and have since also opened an issue there in the case that the issue lies on their part but the error seems to be from this library since I've attempted to print out the result of reading "self._ReadByte(SI114X_PART_ID)" and it seems to return a value (81).

[htkelly]

I'm experiencing the same issue with the same equipment (SI114X and Grove base hat) and this library.

Also getting the same output from I2C detection:

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- 08 -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- 53 -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --  

@duart38 did you learn anything more about this? It seems the actual I2C address of the sensor is 0x53 but the library expects 0x60. However as you noted, passing 0x53 when initializing does not help.

[A-Cedeno]

@duart38 @htkelly were you able to fix this issue? I also get the same error "Please check if the I2C device insert in I2C of Base Hat" when I follow the tutorial.

[htkelly]

@A-Cedeno actually I did. For me, it was because I was using the wrong library for my version of the sensor. I have the v 2.0 sensor which is based on Si1151. Using the Si1145 library gives this error.

The file you need is in the Si115X branch of this repo. Let me know if it works:
https://github.com/Seeed-Studio/Seeed_Python_SI114X/blob/Si115x/seeed_si115x.py

[A-Cedeno]

@htkelly Yes, the Si115X library worked! Thank you for the advice.