Q: Connecting hp printer to ipad

There's a list of printers that support AirPrint, the native mechanism for printing from iOS, here:

http://support.apple.com/kb/HT4356

HP also has an app that enables printing to some of their other wireless printers. Third-party printing apps such as PrintCentral are also available. All such apps have limitations, so check them out thoroughly before you pay for any such app.

For other printers, you can route the printing through your computer. If you have a Mac, Printopia would be worth a look. Fingerprint is another option that is available for both Mac OS X and Windows system. You could also consider an AirPrint-capable print server. Lantronix makes a couple of models, including one that supports a USB printer:

http://www.lantronix.com/it-management/xprintserver/xprintserver-t2.html

Regards.

Forum Tip: Since you're new here, you've probably not discovered the Search feature available on every Communities page, but next time, it might save you time (and everyone else from having to answer the same question multiple times) if you search a couple of ways for a topic, both in the relevant forums and in the Apple Knowledge Base before you post a question.

See requirements for AirPrint and printers that support AirPrint here:

http://support.apple.com/kb/ht4356

If your printer supports AirPrint but does not work then:

Your printer might need a firmware update

Your printer must be on the same WiFi network

Your router must support Bonjour (Zero-configuration networking).

Troubleshooting:

Turn Off iPad, WiFi router (remove from power), and Printer (remove from power).

Turn on WiFi router

Wait 30 seconds

Turn on printer

Wait 30 seconds

Turn on iPad

Try to print.

If you need more help then what model printer do you have?

For a regular printer, you need to ensure that it and the iPad be on exactly the same subnet. With that and appropriate apps, you don't need AirPrint capabilities.