era 300 disconnecting from wifi.

I have read a couple of hours worth of info on ways to keep the Era 300 from disconnecting from Wi-Fi.  I bought it less than a week ago.  First 2-3 days I had no trouble.  Now all I have i do is connect, play music. Reconnect next time I want to play more music, and it’s a never ending circle.  I bought Sonos because I heard it was easiest to set up and easy to manage.  Yikes.  I have factory reset, factory reset while switching off my private Wi-Fi address.  I haven’t figured out how to put all speakers on the same channel.  Sonos recommends 1,6 and 11.  Don’t know what that means or how to do it.  It’s like reading Chinese to me.  Has anyone tried that, and does it work?