I've got an Sonoff 4CH Pro R2 and need to use the 5-24VDC input. But when i add 11.15VDC it wont turn on the Sonoff 4CH Pro R2. When i try with a 12VDC Transformer it works as i should, can somebody tell me what there is wrong?!
What will happen if you switch plus and minus? would the item burn off, or could it register it?