OP-BT / OP-BTS Firmware Downloads


OP-BT / OP-BTS Firmware Downloads

OP-BT and OP-BTS use the same firmware file. You can use the same firmware file for upgrading either OP-BT or OP-BTS devices.

Latest Firmware Downloads

V4.98 (2026-09-11)

Download Links:

Update Notes:

  • Optimized IEC meter reading communication
  • Improved serial forwarding reliability

Firmware Upgrade Guide

Download Firmware Upgrade Tools

Upgrade Methods

OP-BT and OP-BTS support the following firmware upgrade methods:

  1. OP Manager App upgrade (Bluetooth upgrade mode only — red LEDs): no driver install; online latest firmware downloads inside the app (no need to download the zip manually first); local .fw also supported. Desktop serial (including Bluetooth virtual COM) and mobile BLE.
  2. USB Upgrade (OP-ISPTOOL only): Connect the device to your computer with a USB cable for firmware upgrade.
  3. Bluetooth Upgrade (OP-ISPTOOL over Bluetooth SPP, or OP Manager): Pair the device using Bluetooth SPP, then upgrade via the virtual serial port — or use OP Manager for a simpler path.
  4. Optical Probe Dock Upgrade (OP-ISPTOOL only): Use the optical probe dock for upgrading.

Entering Upgrade Mode

  1. When the device is off, press the power button
  2. Within 1 second, press the select button
  3. When the screen enters “Firmware Upgrade” mode, both groups of LEDs will flash red or green
  4. Use the select button to toggle between Bluetooth mode (red LEDs flashing) and Optical Probe mode (green LEDs flashing)
  5. Tool correspondence: OP Manager requires red-LED Bluetooth upgrade mode. USB physical-port and infrared (green LED) upgrades use OP-ISPTOOL.

Precautions

  • Be sure to use the correct firmware for your device model (contact us if unsure)
  • Keep the device steady during upgrade
  • Do not disconnect the power during upgrade
  • It is recommended to upgrade with a fully charged battery
  • The device will reboot automatically after the upgrade completes

Firmware History

V4.96 (2026-07-07)

Download Links:

V4.93 (2026-06-01)

Download Links:

V4.88 (2026-04-06)

Download Links:

V4.87 (2026-03-06)

Download Links:

V4.84 (2026-02-24)

Download Links:

V4.74 (2026-02-04)

Download Link: OP-BT/OP-BTS 585 Firmware V4.74

  • Optimized scripting functions
  • Improved user experience
  • Enhanced user experience in fast charge mode

V4.68 (2026-01-29)

Download Link: OP-BT/OP-BTS 585 Firmware V4.68

  • Improved file system management
  • Interactive scripting support
  • Improved user experience of storage management in OP-MANAGER
  • Middle button supports one-button script execution (hardware support required)
  • Improved user experience for status indicator lights
  • Support for combo key reset to default settings

V4.56 (2026-01-08)

Download Link: OP-BT/OP-BTS 583B Firmware V4.56

  • Optimized internal scripting functions
  • Enhanced visualization of self-test, making it easier for users to identify device status
  • Improved system stability
  • Improved reliability and fault tolerance of configuration data
  • Enhanced memory management
  • Added several new runtime commands
  • Improved file system compatibility

V4.42 (2025-12)

Download Link: OP-BT/OP-BTS 585 Firmware V4.42

  • Added support for new hardware
  • Improved battery and charging management
  • Improved user experience of OP-BTS menu system
  • Support for middle button customization (hardware support required)
  • Added support for new multi-color status LEDs (hardware support required)
  • Improved compatibility with OP Manager

V4.37 (2025-11)

Download Link: OP-BT/OP-BTS 583B Firmware V4.37

  • Optimized serial port settings logic for different baud rates
  • Improved display of serial port parameters in OP-BTS menu
  • Improved system sleep behavior
  • Sound output support (hardware support required)
  • Support for 38K infrared (hardware support required)
  • Serial port supports half-duplex and full-duplex
  • Added support for 115200Bps

V4.31A (2025-09)

Download Link: OP-BT/OP-BTS 583B Firmware V4.31A

  • Improved system stability

V4.31 (2025-09)

Download Link: OP-BT/OP-BTS 583B Firmware V4.31

  • Improved compatibility for some meters

V4.30 (2025-08)

Download Link: OP-BT/OP-BTS/OP-BTM 583B Firmware V4.30

  • Optimized serial port configuration logic
  • Added support for intermediate baud rates in IEC62056-21 protocol
  • Improved processing performance
  • Improved device management
  • Support for switching between master and slave modes

V4.1 (2024-12)

Download Link: OP-BT/OP-BTS 583B Firmware V4.1

  • Fixed some issues
  • Improved software performance
  • Added support for more meters

V3.08 (2024-03)

Download Link: OP-BT/OP-BTS 583A Firmware V3.08

  • Official release
  • Supported basic Bluetooth communication
  • Implemented core optical probe features

Technical Support

For any technical questions, please contact our support team:

Last update: September 11th, 2026