Did you see this response from @corey about how your long hex password might be a problem depending on what security is being used. Blinking green means can connect to WiFi so that could the security or it could the be 2.4 vs 5 GHz problem. If you a dual-band router, renaming the SSID for the 5GHz side will prevent the Photon from connecting to it so it can only get to the correct 2.4GHz part.