HELP for Car ECU Reading Project with NodeMCU ESP8266 and MCP2515

[brunopbaffonso]

Hello!

I'm having difficulties with a personal project and any help you can offer would be extremely valuable!

The idea of ​​the project is to read my car's ECU, process the signal, and make the data available in Serial format.

I'm using my own car to create this PoC, a VOLKSWAGEN VOYAGE 1.6L AF5 2020 (2021 model).

I connected pins 6 and 14 of the car's OBD2 port to the HIGH and LOW connectors of the MCP2515 module, respectively, to read the CAN signal.

For the master board of this circuit, I used the NodeMCU ESP8266.

The connections between the MCP2515 module and the NodeMCU were made through several trials and errors. Additionally, I tested several online code examples, but unfortunately I was unsuccessful with any of them.

I can't believe all the tutorials I found and tried didn't work. I know I'm probably making a mistake, but I would like some direction or guidance to move forward.

Thank you in advance for your attention and help.

Below are some links used as references for Documentation/Concepts, Codes and Electronic Connections...

notepad.pw

Thanks for the attention!

Regards;
Bruno Affonso.

[gilshultz]

@brunopbaffonso

I would like some direction or guidance to move forward.

Sorry I cannot help with the information given. It is probably both hardware and software problems. Post an annotated schematic of your system, be sure to show all connections, components (such as resistors, capacitors, etc). Post links to technical information on each of the hardware items.

Also realize some of those CAN messages are manufacturer specific. During your research you probably found the OBDII messages, those should be correct.