(for python) With this canbus library, you can handle CAN bus data more easily.
i used 2-Channel Isolated CAN Expansion HAT for Raspberry Pi, Dual Chips Solution
in this project https://www.waveshare.com/2-ch-can-hat.htm my rasberry pi is 4 model b.
pip install CanbusHandler
#or
pip install git+https://github.com/jaakka/PythonCanbusHandler.git
#Remember start canbus
sudo ip link set can0 up type can bitrate 500000
sudo ifconfig can0 up
sudo ip link set can1 up type can bitrate 500000
sudo ifconfig can1 up
500000 is 500kbps, you need to find out the right speed for your car.
In my mercedes have two speeds CanB is for radio, windows, and other amusement devices, speed is 83,3kbps CanC is for motor and more important devices and speed is 500kbps (+ 5times faster)
Also remember to check that you don't have the end resistors in use, you probably won't need them if you're reading messages from the car
Usage Here's a simple example of how to use the CanBusHandler library:
from CanbusHandler import Handler, Channel
bus = Handler(Channel.CanB)
bus.AddCheckList(0x0016, 0, 8, "Battery")
bus.AddCheckList(0x0000, 3, 1, "Terminal50")
bus.AddCheckList(0x0000, 5, 1, "Terminal15")
bus.Begin()
devicePid = 0x1
msg = [0x3,0x4,0x5,0x3]
times = -1 #send every second and never stop
busB.SendMessage(devicePid, msg, times)
-1 means message sends every second and never stop
devicePid = 0x3
msg = [0x5,0x7,0x3,0x5,0x3,0x5,0x3,0x5]
times = 15 #send every second 15 times
busB.SendMessage(devicePid, msg, times)
15 means message sends every second and ends after 15 messages.
Features Send and receive CAN messages Monitor specific variables on the CAN bus
CHECK tutorial.py
if you like canbus playing check out my car project, I created custom carcomputer with rasberry pi and 3d printer. https://www.instagram.com/project_yel_mb_e/