Lose Sonos adding wireless printer

My Sonos system consists of:
Play 5 ethernet- wired to home network
Connect - wireless to Stereo system
Play 3 - wireless on Patio
I installed a Canon MP6320 multi function printer to my wireless network.

I lost the wireless Sonos components. The wired component was OK.

I pulled the plug on the printer and uninstalled it.
After pulling the plugs on the Sonos wireless components (Connect and Play 3) they came back up.

I have an ATT Uverse system. Any idea how I can make them live happily together?

I plugged the Cannon in - reinstalled it from my desktop and everything worked. I have no clue why?