The quest for an affordable VCDS (VAG-COM Diagnostic System) often leads to exploring clone cables. This article dissects two different Vcds Copy cables, analyzing their hardware, functionality, and potential risks. We’ll delve into the intricacies of these clones, comparing them to genuine Ross-Tech cables and offering insights for those considering this budget-friendly alternative.
Distinguishing Between Two VCDS Copy Cables
The market for VCDS copy cables is diverse, with varying quality and compatibility. This investigation focuses on two distinct types:
The Atmega162-Based VCDS Copy: A Hex-CAN Imposter
The first cable utilizes the Atmega162 microcontroller. Advertised as a VCDS version 2 (V2) cable, it turned out to be a HEX-CAN cable, an older generation. Priced at $29, this cable required a separate loader executable flagged as malicious by VirusTotal.
Interestingly, the Atmega162 is also used in genuine Ross-Tech HEX-CAN cables.
Due to its outdated functionality and the security risk associated with the loader, this VCDS copy is not recommended. Using it in a virtual machine might mitigate the malware risk, but it offers no advantage over a genuine HEX-CAN cable.
The STM32F405-Based VCDS Copy: A Functional V2 Clone?
The second cable, priced at $49, utilizes the STM32F405 microcontroller, similar to the chip found in genuine VCDS V2 cables.
This cable functioned without a separate loader or modification to the VCDS software, exhibiting faster logging and data transfer speeds compared to the HEX-CAN cable.
Bypassing Security: Unlocking the STM32F405
Further analysis involved extracting the STM32F405 chip and bypassing its Read-Out Protection (RDP) using a ChipWhisperer.
This allowed for debugging and RAM dumping, revealing insights into the chip’s firmware. A video demonstrating the process is available: https://youtu.be/4JFo23tYOq0
Conclusion: VCDS Copy – A Risky Proposition?
While the STM32F405-based VCDS copy offered surprisingly good functionality, it’s crucial to acknowledge the potential limitations and risks associated with using cloned diagnostic tools. Compatibility with future VCDS software updates is uncertain, and users might be restricted to the version provided with the cable (20.4.1 in this case). While a genuine Ross-Tech cable is always recommended, this clone could be a functional alternative for those on a tight budget. However, proceed with caution and understand the inherent risks of using non-genuine diagnostic equipment.
