Hi, I've got a problem with inputs being very unstable. i defined the inputs as INPUT_PULLUP. at 3 of my arduino's there is no problem (Wire length < 1m) but at one of my arduino the wire length is +/- 5m and all 6 of the inputs are constantly switching. (at this arduino i've got also 6 inputs …

unstable inputs

weedpharma August 20, 2016, 11:44am 3

Add a 0.01uF cap to filter the noise pick up.

Weedpharma