I had some trouble setting up my initial controller and wanted to share in case anyone else runs into the same issue.
Upon set-up I would get through 3 of the 4 lights (boot, wifi, connect to Rachio) but not the 4th (activate controller). Multiple attempts failed including trying different wifi networks.
I did a hard reset on the controller wifi settings (hold down the button near the wifi logo until you see the bar flash blue). It took a minute or so to reboot. I retried the set up process and it all worked perfectly.
