Smart plugs only work on 2.4ghz. How to keep wifi gateway at 2.4ghz?
Which "smarft plugs"?
I followed Nerdburg. Access your comcast router,then edit the names of your 2.4, and 5.0 gig wireless entities. You probably have them both the same name. I changed my 5.0 to another name and it worked in 10secs. Was getting can error on Gosund plug that it only works on 2.4 .
There were several legacy products in my home that did not conenct to the smart router in the new XfintyFi router and required a forced connection to a 2.4 GHz WiFi band. Even though I elected to use the same password for both, I needed to name two SSID: for 2.4GHz and 5.0GHz. These products included a Honeywell Lyric Thermostat, Smart Plugs and Internet Radio. I then needed to reconnect anything that had previously been connected to a different single SSID. Everything now works but new users and connections must be specifically signed into one or the other frequency.