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I recently built the Penrose. I have calibrated it and when I power the module it works a expected. But after a while Penrose stays on one value or jumps between two values, event though all buttons are switched on.
I hope someone can help me.
I just purchased a used one, and it's doing the same thing as yours. It never works properly though, it only stays on one value or jumps between 2. Would love to fix it, as a return is unlikely!