Sorry i think i do not explained me well.
In this installation i have 1x Opensprinkler 2.0 and 2x expansion boards. The Opensprinkler 2.0 died with power problems, i order at schlaugarten one Opensprinkler 3.0, and dont expected that have changes in expansion system.
But i have other instalations were i can put this 3.0, so is not big problem.
I think that can happen in future to more old clients, so one extra advise with the “incompatible with 2.0 expansion modules” will be recommended.
Thank you for your time, and continue with this great project.