We launched the Serial CAN Bus Module years ago, which is very practial and easy to use. Now we have slightly modified the Serial CAN Bus Module, wrote a special firmware, and launched this I2C CAN Bus Module.

The I2C CAN Bus Module uses I2C for communication. The board is small and flexible, which make it can be quickly used in any system with an I2C interface.

The I2C CAN Bus Module is based on the high-performance MCP2515 CAN Bus controller and MCP2551 CAN Bus transceiver, provides a CAN Bus communication rate of up to 1Mb/s.

In addition, there is an Atmega168PA microcontroller on the board, you can also program it through a USB to Serial board, modify the firmware or write your application directly.

With this library, you can,

1. Send a CAN2.0 frame
2. Receive a CAN2.0 frame
3. Get data from OBD-II
4. Set the masks and filters, there're 32 masks and filters.

1. Download the library
2. Extract the zip file
3. In the Arduino IDe, navigate to Sketch > Include Library > Add .ZIP Library

• /examples - Example sketches for the library (.ino). Run these from the Arduino IDE.
• /src - Source files for the library (.cpp, .h).
• keywords.txt - Keywords from this library that will be highlighted in the Arduino IDE.
• library.properties - General library properties for the Arduino package manager.

• begin()
• sendMsgBuf()
• readMsgBuf()
• readMsgBufID()
• init_Mask()
• init_Filt()
• checkReceive()
• getCanId()
• isRemoteRequest()
• isExtendedFrame

here are many examples implemented in this library. One of the examples is below. You can find other examples here

#include <Wire.h>

#include "Longan_I2C_CAN_Arduino.h"

I2C_CAN CAN(0x25);                                    // Set CS pin

void setup()
{
    Serial.begin(115200);

    while (CAN_OK != CAN.begin(CAN_500KBPS))    // init can bus : baudrate = 500k
    {
        Serial.println("CAN BUS FAIL!");
        delay(100);
    }
    Serial.println("CAN BUS OK!");
}

unsigned char stmp[8] = {1, 2, 3, 4, 5, 6, 7, 0};
int cnt = 0;

void loop()
{
    stmp[7] = cnt++;
    if(cnt > 100)cnt = 0;
    
    CAN.sendMsgBuf(0x01, 0, 8, stmp);
    delay(5);                       // send data per 100ms
}

// END FILE

If you need a Dev board, plese try,

• I2C CAN Bus Module

You can get others CAN Dev board below,

• Serial CAN Bus Module
• CAN Bus Shield for Arduino
• CANBed V1
• CANBed M0
• OBD-II CAN Bus GPS Dev Kit

MIT License

Copyright (c) 2018 @ Longan Labs

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in the Software without restriction, including without limitation the rights
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

If you have any question, please feel free to contact [email protected]