connecting printer

The usual way to fix wifi printers, if that is what you own, is to find the printer maker's utility, the software that runs on your operating system. Then use that to connect the printer to the wifi.

The router just broadcasts wifi. It is then down to the printer to play ball. There isn't much that you can do on a router, beyond fixing it to a particular IP address, that affects what the printer gets up to.

Where possible, using the WPS feature can simplify things.

If you have an HP printer, start here:

Installing HP wireless printer software | Wireless Printing Center | HP® United Kingdom