To gain access to a vehicle's internal network via the OBDII port, follow these steps:

1. Connect to the OBDII Adapter

   • Use either Wi-Fi or Bluetooth to connect your device to the OBDII interface.
   • If using Bluetooth, start the Bluetooth service:

     sudo /etc/init.d/bluetooth start

2. Establish Connection

   • Connect to the OBDII device.

3. Identify the Network

   • Find the name of the network associated with the OBDII adapter (e.g., vcan0).

4. Install CAN Utilities

   • Install the necessary tools to interact with the car's CAN bus:

     sudo apt install can-utils -y

5. Monitor the Network Traffic

   • Use the following command to sniff CAN bus traffic and identify commands:

     cansniffer -c vcan0

6. Capture CAN Commands

   • Log the incoming CAN commands for further analysis:

     candump -c -l vcan0

7. Analyze the Commands

   • Review the captured data:

     more NAME_OF_THE_FILE
   • Filter specific commands by command number:

     more NAME_OF_THE_FILE | grep COMMAND_NUMBER

8. Replay Commands

   • Send a specific command back to the car’s network to reproduce actions:

     cansend vcan0 COMMAND_NUMBER#OTHER_NUMBERS

9. Stop Bluetooth (If Used)

   • When done, stop the Bluetooth service if it was started:

     sudo /etc/init.d/bluetooth stop

This setup allows you to interact with the car's CAN bus via the OBDII interface for testing, diagnostics, or research purposes.