Turn off the Bluetooth feature on any nearby Apple iOS devices.
On your mobile device, go to theHP sprocket app (in English) in the App Store.
Look for an app update.
If an update displays, tap Update.
If an update option does not display, the app is up-to-date.
Turn on the Sprocket.
On your mobile device, open the Bluetooth settings menu.
Nearby devices display.
Look for your Sprocket in the list.
If the Sprocket displays in the My Devices list, tap the Information icon , and then tap Forget This Device. Reset your mobile device by turning it off, and then on. Open the Bluetooth settings menu, and then tap your Sprocket from the Other Devices list.
If the Sprocket displays in the Other Devices list, tap it.
If the Sprocket does not display in the list, tap Search or Scan, depending on your mobile device. When the Sprocket displays, tap it.
Open the HP sprocket app.
Tap the Menu icon , tap sprocket, and then tap Printers.
The Sprocket information screen displays.
Look for a Sprocket firmware upgrade.
If a firmware upgrade displays, tap Get Firmware Upgrade, and then follow the on-screen prompts to complete the update.
If a firmware upgrade option does not display, the Sprocket firmware is up-to-date.
You can now connect and send print jobs to your Sprocket.
I genuinely hope this information helps. Feel free to let me know how it goes.