I recently got a Canon Selphy photo printer. It’s a book-sized printer that outputs 6×4″ photo prints using a dye sublimation process. As I don’t print much this is ideal as there’s no ink to dry out, it uses little space, and the prints are comparable to ones I can get from general online photo printing places.
This all seems great but I had great difficulty getting it to work over Wifi on my Ubiquiti network, particularly using AirPrint.
After a lot of head scratching I came across some old forum posts that mentioned UAPSD (unscheduled automatic power save delivery). I don’t really know what that means, but sure enough there is a setting in the Wireless Networks section of Unifi and enabling this fixed all printer problems.