If your HP printer still can't connect to WiFi, make sure to position the printer close to the router and that you've typed the correct wireless network password. Re-start the printer and router, update the printer firmware and make sure the printer is compatible with your WiFi network frequency. You can also reset the network settings of the printer or run the HP wireless setup again to overcome connection problems. If this doesn't resolve the issue, there may be a need for professional troubleshooting. For more information, please visit Devicesfixes.