Connecting Gen3 to new router

I replaced my older Netgear router with a new Netgear RS700 router and have not been able to connect the Gen 3 to the new router. I have spent HOURS on the phone with technucal support with both Netgear and Rachio and they cannot get this connected. I have been able to connect everything else in the house to the new router but except the Rachio Gen 3.