OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › OSPi & the RTC › Reply To: OSPi & the RTC April 16, 2015 at 12:12 am #36750 RayKeymaster The RTC is optional. It’s really meant for situations where the controller is back from power loss, but there is no Internet yet (so the controller cannot perform NTP sync and will start with a wrong time).
