OP-BT/BTS Series Firmware Upgrade Guide (Infrared Upgrade Mode)

There are three firmware upgrade modes

  • Bluetooth Upgrade Mode: This mode is more suitable for upgrading a small number of devices. The process takes relatively longer, but it is convenient and quick, requiring no USB hardware driver installation or infrared docking fixture.

  • USB Upgrade Mode: This mode is more suitable for upgrading a large number of devices. The process is relatively faster and convenient, but requires installing a USB hardware driver on the computer for first-time use.

  • Infrared Upgrade Mode: This mode is more suitable for upgrading a large number of devices. The process is relatively faster, convenient, and requires no USB driver installation. However, an infrared docking fixture must be prepared in advance.

This guide uses the Infrared Upgrade Mode to explain the steps. The steps for the other two modes are similar. If needed, you can learn about them via the links below.

For the Bluetooth Upgrade Mode guide, please refer to: Bluetooth Upgrade Mode Guide

For the USB Upgrade Mode guide, please refer to: USB Upgrade Mode Guide

Download the Firmware Upgrade Tool

Download the Firmware Upgrade Tool: OP-ISPTOOL.zip

How to put the Bluetooth Optical Head into Upgrade Mode

While the Bluetooth optical head is powered off, press and hold the Power button, then quickly press the Reset/Menu button within 1 second. Two flashing green lights indicate successful entry into Infrared Upgrade Mode. If two red lights are flashing, it indicates Bluetooth Upgrade Mode. You can use the Reset/Menu button to switch between Infrared Upgrade Mode and Bluetooth Upgrade Mode. USB Upgrade Mode is supported in both of these modes.

Bluetooth Optical Head Power Off

Press and hold Power button, quickly press Reset button within 1 second

Bluetooth Optical Head Infrared Mode

Two flashing green lights indicate Infrared Upgrade Mode

Bluetooth Optical Head Bluetooth Mode

Two flashing red lights indicate Bluetooth Upgrade Mode

BTS Optical Head Power Off

Press and hold Power button, quickly press Menu button within 1 second

BTS Optical Head Infrared Mode

Two flashing green lights indicate Infrared Upgrade Mode

BTS Optical Head Bluetooth Mode

Two flashing red lights indicate Bluetooth Upgrade Mode

Preparations Before Upgrading

  • Download the Firmware Upgrade Tool: OP-ISPTOOL.zip
  • Firmware file you are going to upload. (Please contact our technical support team for firmware if you don’t have one: ).
  • OP-USB-IEC Docking Fixture.
  • A Windows 10/11 computer.

Upgrade Instructions

Step 1: Put the Bluetooth device into firmware upgrade mode

While the device is powered off, press and hold the Power button, then quickly press the Reset/Menu button within 1 second. Two flashing green lights indicate successful entry into Infrared Upgrade Mode. If two red lights are flashing, use the Reset/Menu button to switch to Infrared Upgrade Mode.

Bluetooth Optical Head Power Off

Press and hold Power button, quickly press Reset button within 1 second

BTS Optical Head Infrared Mode

Two flashing green lights indicate Infrared Upgrade Mode

BTS Optical Head Power Off

Press and hold Power button, quickly press Menu button within 1 second

BTS Optical Head Infrared Mode

Two flashing green lights indicate Infrared Upgrade Mode

Step 2: Connect to the docking fixture

Connect the OP-USB-IEC fixture to a USB port on the computer. The computer will recognize the fixture and generate a virtual COM port. Align the optical head end of the fixture with the optical head to be upgraded, as shown below:

Note: When docking the fixture with an OP-BT-ANSI optical head, the OP-BT-ANSI head must be rotated 180 degrees before connecting to the OP-USB-IEC fixture.

IEC Optical Head Docking

OP-BT/BTS-IEC connected to fixture

ANSI Optical Head Docking

OP-BT/BTS-ANSI connected to fixture (rotated 180°)

Step 3: Update the firmware

Open the Firmware Upgrade Tool. Select UART for the Interface option. Click the “Load File” button and select the firmware file to update. Click the “Upload Firmware” button and wait for the download to complete. Manually power cycle (turn off and on) the Bluetooth optical head. It can be used normally after a successful restart.

Firmware Upgrade Tool configuration:

  • Interface: UART
  • Device: COMx (The COM port number generated when the docking fixture is connected, COM3 in this example)
  • Baudrate: 38400

Port Configuration:

Firmware Tool UART Configuration

Load Firmware:

Firmware Tool Load File

Update Firmware:

Firmware Tool Upload Firmware

Update Complete:

Firmware Tool Upload Successful

Important Notes:

  1. Ensure the optical head is in upgrade mode before starting.
  2. Ensure the optical head has sufficient battery charge.
  3. Do not power off the device during the operation.
  4. The docking fixture and the optical head must be correctly aligned.

Common Issues and Solutions:

Phenomenon Common Cause
Firmware cannot be updated Wrong interface selected in the upgrade tool.
Firmware cannot be updated Wrong COM port selected in the upgrade tool.
Firmware cannot be updated Wrong baud rate selected in the upgrade tool.
Firmware cannot be updated The optical head and docking fixture are misaligned or oriented incorrectly.
Firmware cannot be updated Hardware failure in the optical transceiver part of the device.
Upgrade process fails or reports error Repeat the operation carefully following the steps.

Technical Support Contact

For any technical questions, please contact our support team:

Email: