u/AggravatingOkra8486

Hi! I am trying to understand if (and how) can I code into the ECU of my Wolkswagen polo 6r TDI 75hp (2011).
Currently I made a web app reading all the data from the ECU but don’t know if and how can I write in the ECU. For example if I want to adjust turbo pression and similar.

Currently I’m using an ESP32 with c++ firmware to read from the CAN pins of the OBD port.

Does anyone knows? Thanks

EDIT: for anyone asking you can find the code here

https://github.com/Ale1x/obd-realtime-platform