HP Printer can no longer be found wirelessly by Mac and iOS devices?

Question

I have an HP LaserJet Pro CM1415fnw printer which has been successfully connected wirelessly for quite some time. I recently replaced an older Time Capsule (flat square) with one of the new tower-looking Time Capsules, and the same replacement for an Airport Express I use as an access point. Again this is all the same setup as previously.
The issue is none of the devices can find the printer wirelessly anymore, despite the fact that the printer reports it's on the network and operating fine, and I can see the printer in the Printers & Scanners/Add window. I have attempted downloading and reinstalling the software from HP, deleting old printers in the Preferences panel and reinstalling from there, and nothing has worked. If I try to re-add the printer using the Bonjour Multifunction entry and AirPrint as the driver, it gets as far as the "Setting up the device" progress dialog and then fails with an error that reads: "An error occurred while trying to add the selected device. Unable to communicate with the printer at this time."
I have tried setting up an IP reservation for the printer and using the IP setup in the Add window (instead of the default); with and without the HP Jetdirect protocol; using the AirPrint driver and the selected HP series driver -- no success with any choice.
So far my only workaround is connecting it by USB to the nearest Mac and sharing it on the network using Printer Sharing. This is not the ideal solution, of course, since it means my iOS devices still can't find it and the Mac needs to be turned on 24/7 to share out the printer. I bought this printer originally specifically for its AirPrint capability so I could print to it from iPads and iPhones as well as my Macs. Currently I can't print from any iOS devices so it's rather painful.
Any suggestions to get this fixed will be much appreciated

Answer 1

Reset the TC to factory and start again..
New names.. short, no spaces and pure alphanumeric.
eg TCgen5 base station name.
I also strongly recommend using different names for the bands when things go wrong. TC24ghz and TC5ghz.
Use WPA2 personal security with a short pure alphanumeric password.. (short meaning 8-20 characters mixed case and numbers)
Redo the setup of the Express based on the new setup.
Redo the connection of the printer to the wireless network.
Test the printer by pinging it from the computer.
Delete all drivers in the computer for the printer.. and start over.
That generally will get it running.
If not use the old TC as a wireless AP for printer connection .. by doing extend wireless with it and placing it near the printer.