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Hi everyone,
I'm currently facing an issue during DC fast charging interoperability testing and would like to seek advice:

When connecting BYD new energy vehicles to some CCS chargers, we observed compatibility problems between the EVCC and the chargers. The CCS charger manufacturers would like to capture the EVCC communication data (mainly ISO 15118 or DIN 70121 protocol messages) to help with debugging.

We have standard sniffer tools available, but due to the vehicle-side communication setup, it has been difficult to capture complete EVCC messages.
Does anyone know an effective method to tap into the communication and collect the EVCC data from a BYD vehicle?

Any tips or experiences would be greatly appreciated!

Thanks in advance!

I see two ways:
1. The cheap: capture the SPI traffic in the vehicle or charger, between the modem (QCA7000) and the host, using a Saleae logic analyzer (clone). I have a python script on my github to convert the saleae data into pcap, to view it with wireshark.
2. The expensive, universal, state-of-the-art: Vector https://www.vector.com/de/de/produkte/p ... e/vh5110a/

uhi22 wrote: ↑Sun Apr 27, 2025 9:27 pm I see two ways:
1. The cheap: capture the SPI traffic in the vehicle or charger, between the modem (QCA7000) and the host, using a Saleae logic analyzer (clone). I have a python script on my github to convert the saleae data into pcap, to view it with wireshark.
2. The expensive, universal, state-of-the-art: Vector https://www.vector.com/de/de/produkte/p ... e/vh5110a/

Thanks for your answer