Arduino+mcp2515 sketch

Hello everyone. Please share a sketch for arduino mcp2515 to work with realdash

I don’t have a sketch for you, but I will say that since I don’t know how to code, almost at all, I’ve been very successful using AI, in my case I used Google Bard to help me write, and understand the code for an arduino sketch. I find bits of code and have Bard explain what each line does, or help me simplify some code that I come up with, so that it’s more elegant. I would start with the sketch that RealDash provides, and see if you can patch in what you need to make your CAN chip do what you want it to.


Here you have this is for r4 uno but should work on other aswell just change wifi library.

Make sure to setup mcp2515 library correct with chrystal etc.

#include <WiFiS3.h>
#include <CAN.h>

WiFiClient client;
char ssid[] = “HarleyDavidson”; // your network SSID (name)
char pass[] = “123456789”; // your network password (use for WPA, or use as key for WEP)

int status = WL_IDLE_STATUS;
WiFiServer server(35000);

const byte RD_FRAME_HEADER[] = {0x44, 0x33, 0x22, 0x11};
byte canFrameBuffer[16];

void setup() {
WiFi.config(IPAddress(192, 48, 56, 2));
status = WiFi.beginAP(ssid, pass);

// Initialize CAN bus
if (!CAN.begin(500E3)) {
Serial.println(“Starting CAN failed!”);
while (1);

void loop() {
client = server.available();
if (client) {
while (client.connected()) {
int packetSize = CAN.parsePacket();
if (packetSize) {
unsigned long PacketId = CAN.packetId();
byte buf3[8];
int i = 0;
while (i < 8 && CAN.available()) {
buf3[i] =;

    // Combine header, ID, and data into canFrameBuffer 
    memcpy(canFrameBuffer, RD_FRAME_HEADER, 4); 
    memcpy(canFrameBuffer + 4, (const byte*)&PacketId, 4); 
    memcpy(canFrameBuffer + 8, (const byte*)buf3, 8); 

    // Send the entire CAN frame to client 
    client.write(canFrameBuffer, 16); 
Serial.println("client disconnected");