Need help sending CAN bus commands using Arduino & Seeed CAN bus Shield

Products & Technology
#1

I have sniffed can bus data from my instrument cluster, but am not sure how to decode it or how to insert it into the Arduino code below so that I can send those codes to my instrument cluster. Any help would be greatly appreciated. This is for a 2017 BMW M240i

I’m using the following code:

// demo: CAN-BUS Shield, send data

// loovee@seeed.cc

#include <SPI.h>

#define CAN_2515

// #define CAN_2518FD

// Set SPI CS Pin according to your hardware

#if defined(SEEED_WIO_TERMINAL) && defined(CAN_2518FD)

// For Wio Terminal w/ MCP2518FD RPi Hat：

// Channel 0 SPI_CS Pin: BCM 8

// Channel 1 SPI_CS Pin: BCM 7

// Interupt Pin: BCM25

const int SPI_CS_PIN  = BCM8;

const int CAN_INT_PIN = BCM25;

#else

// For Arduino MCP2515 Hat:

// the cs pin of the version after v1.1 is default to D9

// v0.9b and v1.0 is default D10

const int SPI_CS_PIN = 9;

const int CAN_INT_PIN = 2;

#endif

#ifdef CAN_2518FD

#include "mcp2518fd_can.h"

mcp2518fd CAN(SPI_CS_PIN); // Set CS pin

#endif

#ifdef CAN_2515

#include "mcp2515_can.h"

mcp2515_can CAN(SPI_CS_PIN); // Set CS pin

#endif

void setup() {

    SERIAL_PORT_MONITOR.begin(115200);

    while(!Serial){};

    while (CAN_OK != CAN.begin(CAN_500KBPS)) {             // init can bus : baudrate = 500k

        SERIAL_PORT_MONITOR.println("CAN init fail, retry...");

        delay(100);

    }

    SERIAL_PORT_MONITOR.println("CAN init ok!");

}

unsigned char stmp[8] = {0, 0, 0, 0, 0, 0, 0, 0};

void loop() {

    // send data:  id = 0x00, standrad frame, data len = 8, stmp: data buf

    stmp[7] = stmp[7] + 1;

    if (stmp[7] == 100) {

        stmp[7] = 0;

        stmp[6] = stmp[6] + 1;

        if (stmp[6] == 100) {

            stmp[6] = 0;

            stmp[5] = stmp[5] + 1;

        }

    }

    CAN.sendMsgBuf(0x00, 0, 8, stmp);

    delay(100);                       // send data per 100ms

    SERIAL_PORT_MONITOR.println("CAN BUS sendMsgBuf ok!");

}

// END FILE

Here are the first few lines of recorded data (I have a ton of lines, but didn’t want to post all of them here, but I can upon request):

0007.439 RX: [00000510](00) 00 00 00 00 FF FF 00 10
0007.440 RX: [0000012F](00) 83 58 1A DD D2 01 31 06
0007.443 RX: [0000012F](00) DE 59 1A DD D2 01 31 06