Hi @John-2026_
Welcome to the community!
Running into snags while setting up a range extender can be frustrating. TP-Link Wi-Fi Extenders are intentionally designed for streamlined setup; so to help you get your RE315 and router squared away, I recommend starting here: TP-Link Range Extender Not Connecting to Router | TP-Link
If you have a few moments, could you share a bit more about your network environment? This could help us better understand your setup and make recommendations.
- How far is the RE315 from your router?
- Is the router's Wi-Fi signal strong at the RE315's location?
- Have you tried setting up the RE315 in the same room as the router, then moving it to another room afterward?
- What is the hardware version and firmware version of your RE315?
- What's your router's model number?
