A net-connected device has no innate IP numbers. Its IP is assigned to the device by your router each time a net connection is established, so the Roku has no IP number when not connected to the net.
Normally a remote for your brand of Roku TV is necessary to set up the Roku's net connection.
A way to do it without a remote has been reported but I have no experience with it. On the surface it sounds like it should work. You will need all of these:
-- A Roku that is still set up for its prior network. If it was no longer connecting to that network when you shut it down, this process won't work and you'll have to use a remote to set the Roku connection up.
-- Knowledge of the network name (SSID) and password the Roku is currently configured to use.
-- A mobile phone with WiFi hotspot capabilities.
-- A second mobile device, either a phone or tablet, with the official Roku (not TheRokuChannel) app installed on a second device.
If you have all these things, here's how you do it:
1) Configure the WiFi hotspot on your mobile phone to use the same network name (SSID) and password as the Roku is currently configured to use. When you turn on this hotspot, your Roku should be able to connect to it and through the phone to the internet. You just won't be able to control it yet.
2) Connect your second device (phone or tablet) to the first phone's WiFi hotspot network.
3) Now that this second device and your Roku are both connected to the same WiFi hotspot, you can run the Roku app on the second device to gain control of your Roku using the app's remote control capabilities.
4) Using the app, set up the new network on the Roku, via Settings > Network > Set up network.
5) When the Roku connects to the new network, change the second mobile device's WiFi settings to this same network (SSID and password).
6) You can now continue to use the Roku app on the second device to operate your Roku on the new network.
7) The Roku is no longer connecting to your phone's WiFi hotspot, so you can shut that down. If you wish, you can also use the Roku on this phone to control your Roku.
If you decide to try this, please report back how it worked.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X
