err-04RP4T Mobile

Honeywell RP4T Mobile error 04: Bluetooth Connection Failure

The Honeywell RP4T Mobile error 04 refers to a fault in the wireless communication module, affecting the Bluetooth link between the host terminal and the printer. When the initial handshake fails, this error suspends data transmission. Resetting the connection cycle usually resolves the issue.

1 views

Common causes

  • 1Electromagnetic interference: Heavy 2.4GHz usage nearby.
  • 2Firmware incompatibility: OS/printer software mismatch.
  • 3Buffer overflow: Excessive commands sent.
  • 4Radio module failure: Internal antenna damage.

Solutions

Diagnóstico rápido

If the printer is not discoverable or pairing fails frequently, error 04 is the culprit. Verify that the printer is within range and that other radio equipment is not interfering.

Solución paso a paso

  1. Cycle Radio: Toggle Bluetooth off and on.
  2. Unpair: Forget the device on your host.
  3. Pair: Perform a fresh connection.
  4. Test: Print a test page.

Prevención y mantenimiento

Keep the printer firmware current. Avoid pairing with too many host devices simultaneously, as it may overwhelm the printer's radio buffer.

Cuándo llamar a un técnico

If the error 04 persists after a full factory reset and firmware update, the internal Bluetooth antenna may be damaged and requires a repair.

Ficha técnica del equipo

  • Technology: Thermal printer with Bluetooth
  • Connectivity: Bluetooth / Wi-Fi
  • Range: Up to 10 meters
  • Capacity: High speed transfer
  • Compatible media: 4" thermal labels
  • Usage: Mobile environments
  • Official drivers / firmware

Steps to follow

  1. 1

    Cycle Bluetooth

    Disable and enable Bluetooth functionality through the printer menu.

  2. 2

    Forget device

    Delete the printer from your smartphone's list of paired devices.

  3. 3

    Re-pair

    Enable discovery mode and re-pair from your host device.

  4. 4

    Verify

    Test the connection with a sample print job.

Frequently asked questions

This code indicates a failure in the RF module, causing pairing or connectivity drops.

It is critical for wireless operations; printing is blocked until communication is restored.

Keep firmware updated and minimize radio interference.

No, this is a purely communication-based error, not media related.