There are three firmware upgrade modes
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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.
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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.
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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.
Press and hold Power button, quickly press Reset button within 1 second Two flashing green lights indicate Infrared Upgrade Mode Two flashing red lights indicate Bluetooth Upgrade Mode
Press and hold Power button, quickly press Menu button within 1 second Two flashing green lights indicate Infrared Upgrade 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.
Press and hold Power button, quickly press Reset button within 1 second Two flashing green lights indicate Infrared Upgrade Mode

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

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.
OP-BT/BTS-IEC connected to fixture 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:
Load Firmware:
Update Firmware:
Update Complete:
Important Notes:
- Ensure the optical head is in upgrade mode before starting.
- Ensure the optical head has sufficient battery charge.
- Do not power off the device during the operation.
- 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: