Hello, after 25 active years of coding, Ive never encountered anything comparable to what happend today. Using the Adafruit Motorshield v2.3 on the UNO, connected to 4 DC-motors, there were so many "bugs", which are absolutly impossible to happen. But they did. Like a boolean variable was not set…

Arduino behaves non-deterministic?

MorganS May 12, 2018, 9:12pm 3

What other inputs are you using? You may be getting E-M interference.

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