HP Smart app will not connect to printer

[Candycane0310]

I have a Wireless HP C4780 printer and an iPad Air 5th Generation on iPadOS 16.2. I downloaded the HP Smart app to print from my iPad to the printer. When I follow the prompts to Add my printer in the App, the App finds my printer on the network no problem but then it just sits saying "Processing..." with no action. I have restarted the iPad and the printer, I an uninstalled and installed the app and I have even left the app at this screen for an hour but nothing changes. Any ideas? Thank you.

[Dragon-Fur]

@Candycane0310 

Welcome to the HP Community Forum.

I found a review date for this  printer dated 2010.

The printer is not listed as supported for HP Smart --

Vintage printer might be too old to use with HP Smart.

If it's not "too old", it might simply be one of those printers that are not supported.

Mobile Printing – Options for Printers

Start here

Print from your Android, iOS, or Amazon Fire device with the HP Mobile printing app.

Open the section for your printer series  >  Find your printer and supported applications.

HP Printers - Mobile Printing Solutions Compatible with HP Printers

Photosmart C4700 series: Photosmart C4740 Photosmart C4750 Photosmart C4780 Photosmart C4783 Photosmart C4788 Photosmart C4795

HP Print Service Plugin

Some places to recheck --

Check your router -- this printer only supports an older Wireless connection type: WiFi 802.11b/g

Make sure the router is broadcasting on the 2.4GHz frequency.

Most routers should be backward compatible but it's worth checking how your network is configured.

Switch ON your Bluetooth and location services on the iPad.

If you are using a VPN, switch off that service.

References / Resources

HP printer setup (Apple AirPrint for iPhone, iPad)

Printer Specifications for the HP Photosmart C4600 and C4700 All-in-One Printer Series

Component	Minimum	Recommended
Connectivity	HP Photosmart C4600 All-In-One Printer: USB 2.0 High Speed cable HP Photosmart C4700 All-In-One Printer: USB 2.0 High Speed cable or built-in WiFi 802.11b/g	HP Photosmart C4600 All-In-One Printer: USB 2.0 High Speed cable HP Photosmart C4700 All-In-One Printer: USB 2.0 High Speed cable or built-in WiFi 802.11b/g

HP Smart (Mobile) >>> Download / Install - How-to - and FAQ

HP Printers - Using the HP Smart App (Android, Apple iOS)

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HP Printer Home Page - References and Resources

Learn about your Printer  - Solve Problems

“Things that are your printer”

When the website support page opens, Select (as available) a Category > Topic > Subtopic

NOTE:  Content depends on device type and Operating System

Categories:  Alerts, Access to the Print and Scan Doctor (Windows), Warranty Check, HP Drivers / Software / Firmware Updates, How-to Videos, Bulletins/Notices, Lots of How-to Documents, Troubleshooting, Manuals > User Guides, Product Information (Specifications), Supplies, and more

Open

HP Photosmart C4780 All-in-One Printer 

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