No, they are actually very sophisticated communication cables that happen to be able to deliver a lot of energy. Read this
Really, don't mess with it.
The link applies to public charging stations and has nothing at all concerning the end-user EVSE. The EVSE in the owner's garage is still just a fancy extension cord.
I don't see any credible reverse-engineering here that would allow for a solid, safe design. Your "glorified extension cord" doesn't exactly inspire confidence. As it stands at this point in the discussion, we don't know what the ESP device in the EV charger does.
OK, how's this: If things go south and the insurance company finds out that he modified the circuit; doesn't matter if the modification was perfect, he's on the hook for the entire loss.
I have circuits that I have deployed that take on some potentially significant risk. I will take on that responsibility because I am confident of my design and also because I'm in a position to do so. If @tinman42 has that level of comfort in taking on the potential risk, go for it.
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I think there is a better way to add the charger to HA, it seems like you MIGHT be able to overwrite the OCPP URL and then host your own. That means you wouldn't need to change any of the firmware at all.
Eitherway if you'd dumped the default firmware on the device I'd love a copy to help me reverse engineer it a bit more. I might get lightly murdered by my wife if I open mine up.
Hey mate, I'm trying to do the same. I read the manual for the charger and it states it supports ocpp, but I can't find anything about it in the WebUI.
I segmented it off in my network, and can see it trying to reach some Chinese OCPP endpoint. But am blocking its traffic.
What pins did you connect to for the serial interface? Or did you have any luck with OCPP on yours?
here you go sir
I just took this from mine.
so, i have been poking at this, it looks like it uses mutual TLS auth to the lotusflashcharge servers. im going to try patching in my own TLS cert and seeing if i can get the information out of it i need. Or if i can work out where the URL is set for their OCPP server if i can re-direct it to my own server where i can listen to the packets. For now, im even happy to strip out the HTTPS / TLS stuff.
Another thing i was going to attempt, is by pulling the ESP's RSA private key, and hitting their server seeing if i can get any data back with a GET request.