Many cheap OP-COM clones ship with corrupted firmware or fake version labels (such as "Version 1.70" or "1.95" which are often just relabeled, unstable 1.45 firmware). Flashing a genuine 1.99 HEX file establishes a reliable, known baseline. Hardware Requirements Before Flashing
While "opcom firmware 199 hex file top" is widely shared in diagnostic communities, it’s essential to note:
The 1.99 designation is a label used exclusively on Chinese clone interfaces. It is designed to work with counterfeit or "fake" PIC microcontrollers. Manufacturers of these clones use this version number to market their devices as "latest version" or "top" models, which leads to significant confusion as buyers often mistake the firmware number for the software version . To reiterate, the latest official firmware is 1.67, and any number higher than this is a clone-specific firmware.
Some developers have mirrored the firmware. Search for opcom-firmware-199 . Ensure the repo has a README with checksums. opcom firmware 199 hex file top
On Windows 10/11, you may need to disable driver signature enforcement to install the USB drivers. Conclusion: Why V1.99 is Top Choice
Version 1.99 is generally more reliable for sensitive tasks like key coding, immobilizer resets, and variant coding.
Ensure the pins on the programmer match the labels on the OPCOM board, particularly VDD and GND, or you will burn the chip. 3. Setup the Programmer Plug the PICkit 3 into your PC via USB. Open the . Ensure the device is detected ( PIC18F458 ). Go to Device Family and select PIC18F . 4. Flash the Hex File Click Import Hex and select your Firmware_v199.hex file. Click Write (or Program). Wait for the message: "Programming... Successful" . 5. Verify and Test Many cheap OP-COM clones ship with corrupted firmware
: Best performance is found on Windows XP or Windows 7 (32-bit) .
For Opel/Vauxhall owners and specialized automotive technicians, the OP-COM diagnostic tool is an essential, budget-friendly alternative to official dealership software. While many users operate on older firmware versions, upgrading to the is currently the top choice for maximizing the capabilities of V5 clones featuring the PIC18F458 chip.
Reduced "Interface Not Found" errors during scans. It is designed to work with counterfeit or
: Many budget clones marketed as V1.99 actually use a PIC18F45K80 chip. Attempting to flash these with a standard .hex file often "bricks" the device because they use a different bootloader. Flashing and Recovery Guide
Plug the OP-COM device into your PC's USB port. Do not connect it to the car yet. Ensure your FTDI USB-to-Serial drivers are properly installed and the device shows up under Windows Device Manager without error flags. Step 3: Configure OCFlash
Connect your PIC programmer to the ICSP pins on the OPCOM board. 3. Flash the HEX File Open your PIC programmer software (e.g., PICkit software). Select the chip. Load the 1.99 HEX file . Select "Write" or "Program" . Ensure that the "Verify" step passes. 4. Reconnect and Test Plug the OPCOM interface into your computer. Open your OPCOM software (e.g., 120309a).
These versions offer the best compatibility with the widest range of Opel vehicles (1996–2010+) and are less likely to brick the device during use.
Original OP-COM units use a unique bootloader. Clones often have:
