Resurrecting this old thread. I have the exact same issue. My pump is a fixed flow rate and need to run 2-3 stations at once. I use weather adjustment and can’t have a gap between the programs. Is there something that can be done Ray?
I saw another post with someone who edited the cron job to specify the stations and times together. This works on the pi, but I don’t see how to access cron jobs on the embedded 3.0 product.