Search for: Log In Register OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › Will expansion board from v2.3 work in v3? This topic has 1 reply, 2 voices, and was last updated 1 month ago by Ray. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts March 7, 2021 at 9:08 am #69378 SergeiParticipant Hi! I am thinking about buying a v3 controller to keep an extra just in case. Would an old expansion board from my v2.3 work with a new controller? Thanks, Sergei March 11, 2021 at 9:23 am #69414 RayKeymaster v3 controller only works with expander version 3, so unfortunately the previous expanders (2.x) will not work with v3 controller. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › Will expansion board from v2.3 work in v3?