Rachio 3 Will Not Connect To WiFi Router is Tenda NovaE360 Mesh

After multiple attempts to connect with my old Samsung phone, I was able to connect and get the firmware downloaded. My guest connection allowed me to connect. I wanted the Rachio so that when I go on vacations and out of town for work, I can be connected with the system so my wife will not need to monitor rainfall, etc. It has been working well the past several days.