I am laying out a customized version of OSPi and have a few questions regarding the RTC.
I understand that the Pi does not have a time source, but if using NTP, is the RTC necessary? Are there interlocks in place that prevent the software from activating zones if there is no valid timesource (for example, before NTP syncs the local clock)?
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).