I have an autoclave as a pump, it needs charging before it’s ready to irrigate.
I noticed that opensprinkler does not have the function to start the master pump seconds before the start of the irrigation zones.
It would be very important for me to be able to manage the early start of the pump by setting the seconds.
I just responded to this question in an earlier thread. The work-around is to use a dummy zone (specifically, the first non-master zone) to serve as a proxy for the master zone, and include that dummy zone in your program. It can achieve the effect of master opening xx seconds before other zones start.