Roku device not connecting to my wifi

When you are reporting a problem like this, it's critical to know a couple of things. First, what model Roku? If it's a Roku TV, who was the manufacturer, and for a Roku player what is the exact model number? You can see the model number under Settings/System/About. 

For WiFi connection issues, you need to provide the following: 

• Does the Roku see your WiFi but is rejecting the connection?
• Does the Roku not even see your network? 
• Does it see any networks (such as a neighbor's, not that we're trying to connect to it)?
• Are you connecting to a router that was provided by your Internet provider (such as a cable company) or your own personal router?

With the above information, then someone can offer some more specific suggestions to get you connected.