Reading diagnostic trouble codes with mcp2515 and arduino uno

Projects General Guidance
1

I'm working on a project of an OBD2 scanner that reads DTC(Diagnostic trouble codes) of a car and print them on an LCD.
As hardware,i have an arduino uno and an mcp2515 can controller/transceiver.
I'm currently using the library "mcp_can" for mcp2515, and i would like to know if i can acheive this projet with the hardware components i mentioned and how can i do it.
I successfully read CAN data by using the same library.
Thank you,

2

Check what the library offers.

1 Like
3

Good. Then all that is needed is the LCD part. There should be sample programs for the LCD in your Arduino IDE. Get the sample program working and then add the code you want to your original OBD2 program and start displaying the codes.

4

I think there are examples in the library reading codes and printing to serial monitor - almost there !!

5

I used it and it does not work

6

Hmmmm….

In that case we need to see the code you used and wiring diagrams , they do work !

Example

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