usb7
small usb devices

CAN/OBD board

CAN/OBD board is development board with the feature of accessing it remotely.

  • Designed to interact with cloud by writing Python, C++ and Rust code.
  • Typical application is to write C++ code to receive CAN signals from vehicle's OBD port, decode/encode CAN signals and write Python code to interface with cloud and upload received CAN signals to cloud.
  • Debian 12 and Python 3.11 running environment.
  • Can be powered via a vehicle's OBD Port.
  • Remote access makes it easier to debug software when it is installed on a vehicle.
  • Our example source code is: https://github.com/usb7/CAN-demo-python

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Hardware specification

  • Based on NanoPi Neo Air which is Allwinner H3 - quad-core ARM Cortext-A7 CPU, 512MB DDR3 RAM, 8GB eMMC, and 2.4GHz WiFi.
  • Runs our tinyDebian OS which is Debian 12.
  • CAN/OBD interface
  • Can be powered via a vehicle's OBD Port.

Configure WiFi and register

Quick test

sudo apt update
sudo apt install can-utils
sudo ip link set can0 up type can bitrate 500000
sudo ip link set up can0
​
# send CAN signals to can0 interface, CAN ID is 123, data is DE AD BE EF
cansend can0 123#DEADBEEF
# receive CAN signals from can0 interface
candump can0
# write received CAN signals into log file
candump can0 -l logfile.log
​
# download file from CAN board
sz logfile.log
# upload file to CAN board
rz

Reference

Detailed information about NanoPi Neo Air: https://wiki.friendlyelec.com/wiki/index.php/NanoPi_NEO_Air