I have a Raspberry PI3
I'm having trouble adding devices like digital relay outputs.
When I add a device in "MCP 23017", they initially work
Perfectly, after turning off and on the board the devices return msg (Unreachable)
Why not recognize the device when you turn on the card ????
When adding the devices to the MCP3008, they work perfectly, not
Presenting previous problem.
What I'm doing wrong, I need help !!!