Hello, we have two Odyssey units that act the same regarding the GPIO.
We have a mix of inputs and outputs configured and some of the outputs don’t seem to be able to source any reasonable amount of current including those connected to header pins 19, 20, and 35. I have about a 10K load on them and only get about 1.6V instead of the expected 3.3V. Unloaded I get 3.3V. Other pins including 3,11,13,15, 23, 29, 31 and 33 all provide over 3V with the same 10K load.
Is it possible there is a configuration issue we are missing?