So first you are connecting to the RS2’s hotspot, its ip is 192.168.42.1 The RS2 hotspot has no internet.
You need to then switch the RS2 to your home office router. So you enter its information SSID myrouter Pass Myrouterpass. Your router will be a different network. Your router would be something like 192.168.0.1 This network must have internet access.
You will have to make your phone / computer join the router network now to access the RS2.
If using RV3 it will automatically find it on the network. If just using a computer you will have to scan the network using a network scanner to find the device.
If all else fails take the RS2 for a long walk, once outside the routers area you will be able to get back onto the RS2 hotspot again.