This article compares two aftermarket VCDS (Vag-Com Diagnostic System) clone cables based on personal experience. We’ll examine their functionality, performance, and potential risks, providing insights for those considering a budget-friendly alternative to the genuine Ross-Tech interface.
Decoding the Atmega162 Cable
The first cable utilizes the Atmega162 microcontroller. Priced at $29, this cable was advertised as a “V2” but turned out to be a HEX-CAN interface, an older generation.
This cable required a separate loader executable flagged as malicious by VirusTotal.
Interestingly, the genuine Ross-Tech HEX-CAN cable also uses the Atmega162 chip.
However, due to the security risks associated with the loader, this Atmega162-based cable is not recommended. It’s likely not a true V2 interface and might require a virtual machine for safe operation.
Exploring the STM32F405 Cable
The second cable, priced at $49, features the STM32F405 microcontroller, similar to the genuine VCDS V2 interface.
This cable functioned without a separate loader or modification to the VCDS software. It demonstrated faster logging and overall performance compared to a genuine HEX-CAN cable.
Further investigation revealed the STM32F405 chip was locked with Read Protection Level 2 (RDP2). Using a ChipWhisperer, the RDP2 was bypassed, granting debug access.
A video demonstrating the process is available: https://youtu.be/4JFo23tYOq0
While RDP1 remained active, memory could be read by glitching the RDP1 check during bootloader communication. This method, however, proved unstable. Further work utilizing the CAN interface and clock glitching is planned for improved stability.
Conclusion: VCDS Clone Software Considerations
While genuine Ross-Tech VCDS cables are recommended, this exploration of Vcds Clone Software options highlights a potentially viable budget alternative with the STM32F405-based cable. However, it’s important to acknowledge potential limitations. These clones might not be compatible with future VCDS software updates requiring firmware upgrades and may be limited to the software version provided (20.4.1 in this case). Always prioritize purchasing genuine tools when possible. However, for those on a tight budget, understanding the nuances of these clones can inform their decision-making process.
