Opcom 167 Firmware Verified -

Physical inspection matters. Genuine OP-COM units have a holographic sticker and a serial number. Clone units (99% of the market) have a plain black casing. If you have a clone, verification is even more crucial because clones often have corrupted bootloaders.

Using a serial terminal (115200 baud, 8N1):

AT+FWVER

Expected response:
+FWVER: OPCOM_167.2_2025-03-15
OK opcom 167 firmware verified

Do not use Windows Update. Use the official FTDI drivers (version 2.12.28 or older) or the specific CDM20830 package. Modern FTDI drivers (v3.0+) actively brick counterfeit FT232RL chips. A bricked chip cannot hold verified firmware.

Your Opcom interface is not just a dumb cable. Inside the plastic housing is a PIC microcontroller (usually a PIC18F2550 or similar). This chip runs low-level firmware that handles the USB-to-CAN/J1850/PWM transition. Physical inspection matters

When you install Opcom software (v1.67), the software includes a firmware file. The first time you plug in the interface, the software tries to "flash" or "update" the firmware on the device.

Here is the problem: Chinese clone manufacturers often use cheaper PIC chips or modified bootloaders. When the official Opcom 1.67 software sends a verification checksum to the chip, three things happen: Expected response: +FWVER: OPCOM_167

Without the "verified" status, your Opcom is effectively a USB paperweight.

Once you have a verified device, protect it.