Troubleshooting an Offline Android Esper Kiosk - English

Step 1: Verify Device Connectivity

1. Check Power Outlet and Cabling
   • Confirm the tablet is plugged into a working outlet. Past cases involved outlets without power due to tripped breakers.
   • Ensure the charging cable and USB-C connector are securely attached and not visibly damaged.
   • Try unplugging and replugging both power and network cables to ensure a solid connection.
   • If available, test a different outlet.
2. Confirm Battery Presence
   • Briefly press the power button. If there’s no response, leave the device charging for at least 15 minutes and try powering it back on.
3. Try a Reboot
   • Hold the Power button to initiate a reboot.
   • If prompted, enter the password: bite
   • Reboot from the control panel.

Step 2: Check Wi-Fi or Ethernet Status on Device

1. Access Device Settings
   • Press and hold Power + Home simultaneously.
   • Enter password: bite

2. Navigate to Network Settings

   • Go to: Settings > Android Settings > Network Settings
   • Verify if connected to a Wi-Fi network or check status if Ethernet is shown.

   ⚠️ Zebra tablets sometimes display Ethernet IP addresses even without a working Ethernet connection. Always confirm physical adapter presence.

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Step 3: Validate Network Connection

1. Wi-Fi vs. Ethernet
   • Zebra ET40 does not include built-in Ethernet. If Ethernet is in use, confirm the USB-C to Ethernet adapter is present and undamaged.
   • If relying on Wi-Fi, ensure the signal is strong and stable.
2. Check for Signal Interference
   • Remove the device from its enclosure if applicable, especially if it sits near the router or access point.
   • Physical interference (metal enclosures, close proximity to the router antenna) can block signal.
3. Router Connection
   • Ensure the router or switch is online and broadcasting.
   • Avoid connecting to the POS router, which may have firewall restrictions.

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Step 4: Whitelist Test (Network Filtering)

Sometimes, network firewalls or filters block required domains:

• Share the whitelist test file: Whitelist Test Doc
• Have the on-site team validate that all required domains are accessible.

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Step 5: Reinstall the App (if removed or corrupted ⚠️)

1. Once the kiosk is online, log in to Esper..
2. Use Esper > Apps > Bite Kiosk > click Install New App.
3. Select latest stable version (e.g., v1.19.9) and click Install.
4. Once installed, perform a device restart to apply.

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Step 6: Factory Reset (Last Resort)

Only use if previous steps fail:

1. Power off the device.
2. Hold Power + Home until menu appears.
3. Select Factory Reset (requires confirmation from on-site IT or store staff).