Makes sense. Based on that explanation, the wiring for the rain sensor may be closer to the sensor vs. the controller… another project for a different weekend. (for now, I connected as-is.. and that is good enough to make it work 🙂 .. but long term I want to remove the physical rain sensor and start using the online logic)
Also wanted to document for the sake of other potential users that OS3DC was a drop-in replacement for the Orbit 57592. Swap was very easy, biggest puzzle was realizing the rain sensor wasn’t directly connected to a pin on the Orbit, and finding the pinout for the 12-station version (most search results pointed to a different version)
thanks!
Mike