Logging CAN bus data using Macchina P1 UTD

I recently purchased P1 UTD by Macchina and I have been struggling to get it to work for the past week. I followed all the documentation provided. I connected it to the internet, did the updates and changed the 2 lines in uEnv.txt. Then I tried the candump command (at different bit rate’s 500k and 1M) but nothing shows up. These are the commands that I ran:

sudo ip link set can0 type can bitrate 250000 listen-only on

sudo ifconfig can0 up 

candump -cae can0,0:0,#FFFFFFFF

I tried this on two cars:

2012 Dodge Grand Caravan RT

2013 Nissan Juke

Both with no success.

What I think might be the issue is that I have the wrong bit rate set (but I’m not sure how to find out my car’s bit rate) or the car’s don’t show any CAN data through the OBD-II connector which I’m not sure how to check either.

I am very new to car hacking and this my first time trying to read data from the OBD-II connector, so any help is appreciated!

To clarify a bit more: I’m interested in reverse engineering all the CAN ID’s in the car and learn exactly what each one does, but for now I only want to see the CAN bus traffic.