The compilation process should be the same as how you compile OpenSprinkler firmware on OSPi:
https://opensprinkler.freshdesk.com/solution/articles/5000631599-installing-and-updating-the-unified-firmware
The compilation process should be the same as how you compile OpenSprinkler firmware on OSPi:
https://opensprinkler.freshdesk.com/solution/articles/5000631599-installing-and-updating-the-unified-firmware