MCP2515 CAN Bus Interface Module Board for Arduino Raspberry Pi

Specifications

• CAN Controller: Microchip MCP2515 (Standalone)
• CAN Transceiver: TJA1050
• Communication Protocol: SPI (Serial Peripheral Interface)
• Supported Speed: Up to 1 Mb/s
• Standard Frames: CAN V2.0B
• Input Voltage: 5V DC
• Oscillator: 8MHz Crystal
• Termination: On-board 120Ω resistor with jumper control
• Dimensions: 40mm x 28mm

Applications

• Automotive Diagnostics: Build your own OBD-II scanner to read RPM, temperature, and fault codes.
• Industrial Automation: Link multiple PLCs or sensors over 1000m distances.
• Robotics: Create a distributed motor control system with deterministic timing.
• Smart Home: Reliable wired communication between rooms.
• Solar Monitoring: Daisy-chain multiple inverters to a single master controller.
• Vehicle Tracking: Interface with GPS modules for fleet management.
• ECU Emulation: Simulate car sensors for bench-testing electronic units.
• Marine Electronics: NMEA 2000 compatible networking.
• Battery Management: Monitor cell voltages in high-power EV batteries.
• Flight Data Loggers: High-speed logging for drone telemetry.

Wiring Guide

•  VCC -> 5V
• GND -> GND
• CS -> D10 (SPI SS)
• SO (MISO) -> D12
• SI (MOSI) -> D11
• SCK -> D13
• INT -> D2 (Optional Interrupt)

⚠️ Warning: Always ensure a common ground between nodes. The TJA1050 requires a stable 5V supply; powering it via 3.3V will result in communication failure.

Package Including : 1 X MCP2515 CAN Bus Interface Module Board for Arduino Raspberry Pi

Frequently Asked Questions (FAQ)

1. Can I use this with 3.3V logic (ESP32/Pi)?
Yes, but ensure the VCC is 5V for the TJA1050; level shifters are recommended for SPI lines.

2. What is the maximum distance?
Up to 1000m at 50kbps, or 40m at 1Mbps.

3. Does it include the termination resistor?
Yes, a 120-ohm resistor is on-board.

4. Why is my initialization failing?
Check if the CS pin in your code matches your wiring (default is often D10).

5. Can I connect this directly to my car?
Only via the CAN_H and CAN_L lines; do not connect SPI pins to the car.

6. What library should I use?
The 'mcp_can' library by Cory Fowler is highly recommended.

7. Do I need two modules to test?
Yes, CAN requires at least one transmitter and one receiver to acknowledge (ACK) packets.

8. Is the crystal 8MHz or 16MHz?
This specific module uses an 8MHz crystal.

9. Does it support Extended IDs?
Yes, it supports 29-bit extended frames.

10. What is the current consumption?
Approximately 5mA in active mode.

11. Can I use this for OBD2?
Absolutely, it is the standard module for DIY OBD2 interfaces.

12. Is it compatible with Raspberry Pi?
Yes, via the SPI bus and overlays.

13. How many nodes can I add?
Up to 110 nodes on a single bus.

14. What does the INT pin do?
It triggers an interrupt on the MCU when a new message arrives.

15. Can I change the SPI speed?
Yes, up to 10MHz is supported.

16. Why do I need a termination resistor?
To prevent signal reflection which causes data corruption.

17. Is it industrial grade?
It uses industrial-grade ICs (-40°C to +85°C).

18. Can I use twisted pair wire?
Recommended for distances over 2 meters.

19. Does it support Loopback mode?
Yes, for internal testing without a bus.

20. What is the TJA1050's role?
It converts logic signals to differential CAN signals.