How to obtain raw data reported by a charge point?

[odiwml147]

I want to obtain the raw data reported by the device for client debugging.But I don't know how to do it now.I hope to get help, thanks.My version is ocpp-1.6J.

[odiwml147]

After my own testing, I found that adjusting the log level to trace can be achieved,Java-websockt will log the original txt, but one drawback is that there are too many logs.