M5 stack pin 21/22 (sda/scl) behaviour
option last edited by option
I am trying to use this as normal inputs.
I have a square wave signal input, and if the signal is present during boot I cannot read it.
If I boot with nothing connected, I can connect and it works like expected.
Is there some special behavior on this pins if they are high or low at boot?
option last edited by
So if anyone else stumbles upon this...
I had M5.powerbegin() in my code, and that will of course enable i2c, so that's the reason for my issues.