A few comments if you have time. Maybe there is something I missing. I connected the printer but still have the problem except for the Mac:
- wirelessly to an Actiontec MOCA access point in another room.
- to the E3200 using a network cable.
- wirelessly to the G3100 (good suggestion, btw).
- wirelessly to the E3200 (the original starting place).
Do you recall making any configuration or settings changes to the G3100? I changed the SSID and password, that's it, everything is still as installed 10 days ago.
That I can wirelessly print from the Mac under all conditions but none of the 4 iOS/iPad devices can is a real mystery. Also, it appears the 4 iOS/iPad devices can see the printer: on the iPhone, tap print > tap "No printer selected" > HP printer listed > tap HP printer name and options screen pops up > in 1-2 seconds printer name disappears and is replaced with "No printer selected".
That's all I know right now.
P.S. I reviewed your article on Airprint and had done these things or did them.