Hi DLiebers2002,
Thanks for getting in contact with the Roku Community.
Let us help you get connected to the network. To start, may we ask do you receive an error message or code when trying to connect? What Roku mobile do you have, a TV or streaming device? Was your device able to detect any other wireless network?
Furthermore, if the affected device is either a Roku Express or Roku Premiere, please note that they are only compatible with wireless b/g/n networks on the 2.4 GHz spectrum. Ensure that your router is broadcasting a 2.4GHz Wi-Fi network for the device to connect to. You can check your device model by navigating to Settings > System > About.
You can also try configuring your router and use wireless channels 1, 6, or 11 which are the preferred channels in North America. Each time you change the wireless channel, you will likely need to apply/save changes before you are prompted to restart the router.
Let us know how it goes.
Regards,
Nimfa