Currently I am trying to control my printer (selphy cp910 & selphy cp900) by Pi using java
My Pi connect with printer via USB cable.
In Pi, I use newest CUP with CP900 driver to control both CP910 & CP900, it work fine but I couldn't detect printer problem (out of paper or ink) so I couldn't retry or do any thing else (alert for operator to feed ink, etc ...)
Do anyone try with this before ?
P/S: I have used CanonEPP to check, and this software work fine, it could detect when printer is going wrong and show alert, I just wonder how CanonEPP works ?