Good day. I have worked with Rachio tech support on this issue for the last few months. Periodically, my controller goes offline and the second quadrant light flashes yellow.
I have read online that these issues seem to happen often with the Rachio 3 (which is what I own). I am also using an Asus rt-ac88u router. The router states the Rachio is connected. I have attempted to turn off all firewall features and disable all security with no change. I have also disabled the 5 GHz radio antenna as I was told by Rachio support that having the two networks confuses the Rachio.
Any help would be appreciated.