OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › Will expansion board from v2.3 work in v3? › Reply To: Will expansion board from v2.3 work in v3? 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.
