CellHub Customer Display — installation and use

The Customer Display is an Android tablet on your counter. During a sale it shows the customer the items, the discount, the taxes and the total. Between sales it plays your videos.

• The tablet connects directly to the CellHub computer over your store Wi-Fi.
• It only displays. It can never change anything in CellHub.

1. Requirements

• Tablet: Android 7.0 or later. The tested app is 1.1.1.
• Computer: CellHub Pro for Windows, open on the store computer.
• Network: the tablet and the computer on the same Wi-Fi. A guest network or one with "client isolation" will not work.
• Router (recommended): a DHCP reservation, so the computer always keeps the same IP address.

2. Download and install

1. In CellHub go to Settings → Customer Display → Start guided setup, choose Android tablet, and follow the steps.

   

2. Install the app on the tablet:
   • Scan the QR in the guided setup, or open cellhubpro.com/downloads on the tablet.
   • Tap Download for Android.
   • Optional: compare the SHA-256 shown on the page with the file.
   • Open the file. Android asks you to allow installs from your browser; that is expected, because the app does not come from Google Play.

   

3. Connect to the CellHub computer

1. Start the display service. Click Start display service. Leave Start it automatically every time CellHub opens ticked. The address appears, for example http://192.168.1.50:47617.

   

2. Point the tablet at the computer. Open CellHub Customer Display on the tablet. Then either:
   • tap Scan CellHub QR and scan the QR from the guided setup, or
   • type the address and tap Connect.

   

3. Authorize the tablet. The tablet appears on the computer as "A tablet wants to connect". Click Authorize. Only one tablet can be authorized at a time.

   

   The tablet then shows your store's welcome screen:
4. Orientation. Choose Horizontal or Vertical to match how the tablet is mounted.

   

4. First successful operation

1. Test screen. In the last step, click Send test screen. The tablet shows a $0.00 test line. Nothing is sold or saved. Click Finish and the tablet goes back to the welcome screen.

   

2. Real sale. Make a sale in the POS. The tablet shows the cart and the total exactly as the register calculates them.

5. Daily use

• During a sale: the items, discount, taxes and total. When it is paid, Payment complete, then the welcome screen again after a few seconds.

  

• Between sales: the videos and photos you add in CellHub → Videos.
• Customer information: the tablet shows the customer's name when one is attached to the sale. When the cashier asks the customer to confirm a phone number, it shows that number.
• Phone payments: these lines show the carrier, not the phone number.
• Storage: the tablet stores only its connection key and a device ID.

6. Restart and reconnection

• The tablet loses Wi-Fi. It shows Reconnecting… and comes back by itself. In testing it was back about 8 s after the network returned.
• CellHub closes or the computer restarts. The tablet shows Reconnecting… with the last screen. When CellHub opens again, it reconnects and returns to the welcome screen. It never keeps a previous customer's cart. In testing this took about 6 s.
  • CellHub 2.5.64 starts the display service by itself when a tablet is authorized.
  • On older versions, turn on Videos → Auto-start display.
• The computer's address changes. The tablet shows the address it is trying and a Pair again button. Type the new address, then click Replace Display on the computer. A DHCP reservation in the router prevents this.

7. Troubleshooting

What you see	What to do
The tablet never appears on the computer	Check that both are on the same Wi-Fi, not a guest network. Check that the address on the tablet is the one CellHub shows. Allow CellHub in Windows Firewall on private networks.
"Port 47617 is in use by another program"	Close the other program, or restart the computer.
Reconnecting… never ends	Check that CellHub is open and that Settings → Customer Display says the server is running.
The test says "The tablet is not connected right now"	Open the app on the tablet, keep it in front, and check the address.
"Another tablet wants to connect"	Click Use this one instead to replace the current tablet, or Decline.
You need the tablet's own menu	Tap the top-left corner five times quickly. From there you can pair again or exit.
The tablet did not rotate	Check Horizontal/Vertical in Settings. The tablet applies it on the next sale activity.

8. Updates and uninstall

• Update: download the newer version from cellhubpro.com/downloads and install it over the current one. It keeps its connection, because updates are signed with the same CellHub key.
• Uninstall: remove the app in Android Settings → Apps. Then, in CellHub, go to Settings → Customer Display → Revoke Display.