Reading the various discussions I'm trying to understand some of the technical concepts, and would like to ask you some questions to understand if they are on the right track.

- Reading and writing in the Obd would be equal to the serial reading ?
Through the reading in the serial/Obd not possible to do a full backup of the ECU ?
- To make a full backup of the ECU what should I save ?
- Reading and writing in the Bdm allows you to do a full backup of the ECU ?
- To connect Bdm you need to remove and open the ECU ?
- What does it mean to connect on Boot ?
Thanks in advance