Guru
Joined: 07/08/2011
Location: AustraliaPosts: 6546
| Posted: 04:36am 04 Jan 2023 |
As a test, don't set PIN 31 as an output. There might be some interaction between 31 and 32 as both are analog pins.
You could take it further with all the pins and see if it is only one or a few pins that causes the problem.
I assume you have tested your wiring to make sure there isn't a bridge between 31 and 32?
Jim