My Canon MX715 printer is wired connected to the router. My iPad is via WiFi connected to the router.
The printer could be connected via WiFi but I prefer the wired connection. So the printer is part of the LAN to which I get access with my iPad via a WiFi connection. A network scanner shows them all connected into the LAN.
My Windows Laptop also connected via WiFi to the same LAN finds the printer and works well every time.
The iPad has troubles to find the printer.
After a couples of hours by trial and error I found an app of Canon Easy PhotoPrint. After I installed the app I found my printer and could print. It worked for the apps at my iPad that have the print feature. After a while I discovered that the different apps at my iPad don't find the printer immediately every time when needed. After multiple trials it works again.
So the big question that remains: Why doesn't it works always? Have I initialize something after start up or wake up the print access to the Lan?