Question : Forwarding the messages after change

[jjtoard]

Hi,

I found your fantastic code and try to understand it.
I want to create a P1 reader and forward it to another device with a P1 interface like an EV charger.
I want to change the messages before sending so try to figure out how the CRC works.

I see you are inverting the serial read interface ? Why are you doing this ?
If I would forward the messages to the TX pin. Would I also need to invert it ? I don't understand this part.
I expect if I forward it on the TX port I will have to avoid println's .