The serial is VR0000568. As suggested, also dropped the firewall, but no luck. To me it appears it hangs attempting to contact your servers, i.e. the three light is flashing. I highly suspect either my router (Asus RT-AC68U), or an ISP (CableOne) issue. The router is running under essentially default settings with WPA2 Personal as a password parameter. Also tried with WPA Auto Personal. Interestingly, when going to no password, an Open System, the Rachio app cannot find the WiFi network. I have another router in storage, unfortunately the same manufacturer and probably similar firmware, but I might try connecting it up for a test. If I speak to the ISP, what sort of questions should I be asking? We have already established they are not blocking the port which Rachio uses.