I have a Raspberry Pi with the Grove Base Hat for some Grove sensors, and recently I got GrovePi also.
I used to play with the setting of Raspberry Pi + Grove Base HAT. Then, I tried the deck Raspberry Pi + GrovePi with a light sensor and everything worked perfectly.
When I try to stack them up like Raspberry Pi + Grove Base HAT + GrovePi, then the light sensor will not work with an error message “OSError: [Errno 5] Input/output error”
Does anyone experience something like that? Appreciate if there is any solution to run the 3 layers stack.
My first guess is that you can’t stack two hats like that since they may both be using the same signals for their I/O pins, and like two trains on the same track, you get a collision.