OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › OSPi with relay card on GPIO › Reply To: OSPi with relay card on GPIO June 1, 2016 at 11:43 pm #42757 mdpluimersParticipant Thank you for the Response. I am using a Active High board. Already tried Active Low setting, did not see any difference. Thijs weekend i Will try what you mention. I Will Keep you updated.