OpenSprinkler › Forums › Hardware Questions › DIY Kit Assembly Questions › Power issues › Reply To: Power issues May 8, 2015 at 1:31 pm #37499 mattsplatParticipant Works on 24Vac on another transformer – powers on, switches on/off, etc. I read you’re not supposed to connect 24Vac and USB at the same time, otherwise I’d try it for the FW update …
