Combined ESP32 and RS485 on Din rail module

[lkint]

Dear Thomas, congratulation with your solution. It looks great.
I am going to get a Shell Recharge installed in the coming months to charge a company car. I am connected on a 3X230V with no neutral wire.
To adapt the charge current(ly) I use the Teslemetty API which works fine but only for my Tesla (using a TWC Gen3). I would like to have that solution more brand agnostic for future use and also because of the capacity charges that are applicable in Flanders. I was wondering if you'd be interested in trying it out on a DIN mounted ESP32 with RS485 interface.... Which module would you want to try it with (I'd like to sponsor that check so I could put it in place later at my place ;-) . My current home charger is a Tesla Wall Connector Gen3 wich also has a RS485 connection that can be connected using a Neurio Smart meter, but the solution doens't seem to work on 3X230 with no neutral wire. If the solution is to trick the charger into using info made available from by the ESP32, would it be similar in approach to do it with a TWC?

Also in your documentation you describe that on the boot process it connects to the device expecting an specific response. How did you figure this out? Did you use a sniffer?

Looking forward to your feedback.
Laurent