Hi @Wkennedy74, have you attempted to power cycle your modem/router? This is a great place to start if you are still having difficulties getting the devices to connect. Once you disconnect the power from your router, leave it without power for a few minutes, and then plug it back up. When that's back online and working, please try another setup of either of your devices and let me know how it goes!
@Wkennedy74 Did you have the Xfinity xFi app on your smart phone? If so, look at the Network tab and see if all of your pods are "online". I've had issues with a pod going offline randomly. Also from that tab you can see which pod a device is connecting too. Sometimes the devices are connecting to pods that are too far away, especially if the pods or router is restarted.