how to change the frequency my buffallo router w/ddwrt uses?
getting bad connections in one of my rooms in a house. old router didn't have any issue so I am guessing it could be a frequency issue?
I'll assume you mean channel?
Log on to the web interface and select the Wireless tab. Select the channel you wish to use (or set it to Auto) then hit Save followed by Apply.
Note that beyond channel there are many other possible reasons for connection problems, including the aerials, power settings and physical location.