I have a battery-powered Arduino device that randomly freezes in regular use on a gym floor, but never on the bench. The only difference I see is that in use there is 100 ft (30 meters) of wire to 6 analog inputs. The device is simply sensing the contact between the ends of those 6 wires, and tells …

Analog sampling over long lines freezes ARM chip

Grumpy_Mike October 24, 2017, 7:09am 5

Ah,
You are just asking for trouble using 1M resistors, and with no pull ups how can it possibly work anyway. Can you post a schematic?

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