Arduino CAN

An Arduino library for sending and receiving data using CAN bus.

Compatible Hardware

• Microchip MCP2515 based boards/shields
  • Arduino MKR CAN shield
• Espressif ESP32's built-in SJA1000 compatible CAN controller with an external 3.3V CAN transceiver

Microchip MCP2515 wiring

Microchip MCP2515	Arduino
VCC	5V
GND	GND
SCK	SCK
SO	MISO
SI	MOSI
CS	10
INT	2

CS and INT pins can be changed by using CAN.setPins(cs, irq). INT pin is optional, it is only needed for receive callback mode. If INT pin is used, it must be interrupt capable via attachInterrupt(...).

NOTE: Logic level converters must be used for boards which operate at 3.3V.

Espressif ESP32 wiring

Requires an external 3.3V CAN transceiver, such as a TI SN65HVD230.

CAN transceiver	ESP32
3V3	3V3
GND	GND
CTX	GPIO_5
CRX	GPIO_4

CTX and CRX pins can be changed by using CAN.setPins(rx, tx).

Installation

Using the Arduino IDE Library Manager

1. Choose Sketch -> Include Library -> Manage Libraries...
2. Type CAN into the search box.
3. Click the row to select the library.
4. Click the Install button to install the library.

Using Git

cd ~/Documents/Arduino/libraries/
git clone https://github.com/sandeepmistry/arduino-CAN CAN

API

See API.md.

Examples

See examples folder.

For OBD-II examples, checkout the arduino-OBD2 library's examples.

License

This library is licensed under the MIT Licence.