MCP2515 CAN Bus Controller Module with TJA1050 – SPI CAN 2.0B

Description

MCP2515 CAN Bus Controller Module with TJA1050 – SPI CAN 2.0B

This module combines the MCP2515 CAN 2.0B controller with a TJA1050 physical-layer transceiver. It provides a convenient CAN connection for Arduino, ESP32, Raspberry Pi, and other projects.

🔧 Technical specifications

• CAN protocol: version 2.0B, up to 1 Mb/s (as listed)
• Controller: MCP2515 over SPI (CS, SCLK, SI, SO), with INT interrupt
• Transceiver: TJA1050 (CANH / CANL levels)
• Supply: 5 V DC (typically 5 mA operating, 1 µA standby)
• Termination: 120 Ω resistor, enabled using a solder jumper
• LED indicators: TX (transmit) and RX (receive)
• Operating temperature: −40 °C to +85 °C
• Dimensions: 44 × 28 mm; mounting-hole spacing: 23 × 38 mm

💡 Typical applications

• Automotive and industrial CAN networks
• Telemetry systems and distributed sensors
• Motor and actuator control and automation
• Embedded IoT projects requiring a robust bus
• Data bridges between microcontrollers and CAN equipment

Arduino code example (using the mcp_can library)

#include <SPI.h>
#include <mcp_can.h>

const int SPI_CS_PIN = 10;
MCP_CAN CAN(SPI_CS_PIN);

void setup() {
Serial.begin(115200);
while (CAN_OK != CAN.begin(CAN_500KBPS)) {
Serial.println("Initialisation CAN échouée");
delay(100);
}
Serial.println("CAN initialisé à 500 kbps");
}

void loop() {
// Envoi d'un message CAN 11-bit ID 0x100, 8 octets
byte data[8] = {0xDE,0xAD,0xBE,0xEF,0x00,0x11,0x22,0x33};
CAN.sendMsgBuf(0x100, 0, 8, data);
delay(1000);

// Lecture
if (CAN_MSGAVAIL == CAN.checkReceive()) {
unsigned long id;
byte len;
byte buf[8];
CAN.readMsgBuf(&len, buf);
id = CAN.getCanId();
Serial.print("Reçu ID 0x"); Serial.print(id, HEX);
for (byte i = 0; i < len; i++) {
Serial.print(" "); Serial.print(buf[i], HEX);
}
Serial.println();
}
}

Code explanation

• Initialize SPI and the MCP2515 module at 500 kbps with CAN.begin(...).
• In loop(), send an 8-byte CAN frame with ID 0x100 using sendMsgBuf().
• Then check for a message with checkReceive(), read its ID and data using readMsgBuf() and getCanId(), and display them in the serial monitor.

🛠️ Pinout and wiring

Note: Enable the 120 Ω termination by soldering the provided jumper if the module is at an end of the bus.