Airprint/Wifi Printing Problems.
I've recently set up my house with 3 eeros replacing the Wifi built into my ATT Router. My HP Officejet Pro is connected wired to the router. I can print directly from my home office workstation (also wired) or from my laptop by WiFi. However, my iPhone or iPad give me a "No Airprint Printers Found Message" and don't see any other printers. This used to work, pre-eero.
I can assure you that AirPrinting works just fine with eeros as I do that myself. In regards to your issue, I need to ask some clarification questions to help make sure I understand your network:
1) When you say you replaced the wifi on your AT&T router, does that mean you completely turned off the wifi on the AT&T router?
2) Is your HP Officejet wired into your AT&T router or your eero gateway?