CAN-Bus to USB-Serial interface for Arduino
This is an Arduino (Nano) firmware to allow a serial device to connect to a car. It provides a translation layer between CAN-Bus of the car and USB-Port of another device.
Selected CAN-Bus packets are read from the car's CAN-Bus. Then the gathered data is grouped logicallly and translated into small USB-Serial binary packets.
Please make sure to read the requirements!
Niscan is an interface to allow the app CarDroid to communicate with a nissan 370z. Main goal was to replace the cars entertainment system with an Android device, while keeping the climate controls functional.
- Arduino Nano or other Arduino board
- A MCP2515 SPI board
- A Nissan 370z Currently Niscan only supports that car!
Other Nissan cars might have the same CAN-Bus layout and work with this project.
Currently no releases, you have to build the project From source
- Get your favourite Arduino IDE
- Clone the repository into your sketch directory
git clone https://github.com/rampage128/niscan.git - Compile and upload to your Arduino
- Install on your Arduino
- Hook up your Arduino to the MCP2515 via SPI.
- Connect to the CAN-Bus of your car (also possible via OBD-Port)
The Arduino sends and receives serial packets to the USB-Serial interface.
Easiest way to make real use of the data is to connect an Android device to the Arduino's USB-Port and get CarDroid.
The hard way is to read the packets from the serial connection. The protocol is custom and subject to change. Generally data is sent in frames. Each frame contains one single packet.
Please see the table below for a general idea:
| Index | Length | Possible values | Description |
|---|---|---|---|
| 0 | 1 | 0x7b |
Start of a frame |
| 1 | 1 | 0x00 - 0xFF |
Packet type to indicate purpose |
| 2 | 1 | 0x00 - 0xFF |
Packet id to indicate request |
| 3 | 1 | 0x01 - 0x7c |
Payload length (L) (only if payload present) |
| 4 | (1 - 124) L | 0x01 - 0xFF |
Payload (only if present) |
| 3 + L | 1 | 0x7d |
End of a frame |
For more information, please refer to the source.
Feel free to open an issue or submit a PR
Also, if you like this or other of my projects, please feel free to support me using the Link below.
- AnalogMultiButton to read the steering wheel remote
- everytime for easy periodic code execution (send packets)
- MCP_CAN_lib to communicate with CAN-Bus on MCP2515
- SPI library to utilize SPI interface