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