# Duo MCP2515 CAN bus Castellated Module

A breadboard-friendly castellated CAN bus module with two channels, optimal for system that have size restrictions

- **Seller:** [Castellated Dreams](https://lectronz.com/stores/cdreams), Ski, Norway
- **Price:** €29.92 (EUR, before shipping and taxes)
- **Availability:** In stock
- **Categories:** Robotics, Prototyping, CANbus
- **Country of origin:** Norway
- **Product page:** https://lectronz.com/products/duo-mcp2515-can-bus-castellated-module

## Links

- [Documentation](https://media.tindie.com/datasheets/36984/2025-01-12-08-17-42/MCP2515-Stand-Alone-CAN-Controller-with-SPI-20001801J.pdf)
- [Code](https://github.com/CastellatedDreams/AVR-MCP2515-CANBUS)

## Images

![Duo MCP2515 CAN bus Castellated Module](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzA0MjEsInB1ciI6ImJsb2JfaWQifX0=--3a83fa584e8eaf4de80e1984918db1f6b1cf6efd/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/2026-08-06T22-07-09.247Z-60a0c643-213c-4fed-a2cf-9909fbe99033.png)
![Duo MCP2515 CAN bus Castellated Module](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzA0MjIsInB1ciI6ImJsb2JfaWQifX0=--c24d099a7cacb75b5650e8a497f621b20f843ba3/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2026-08-06T22-07-09.247Z-IMG_5395.jpg)
![Duo MCP2515 CAN bus Castellated Module](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzA0MjMsInB1ciI6ImJsb2JfaWQifX0=--b6f92b951b2f69609114087bba82957e8be0aa63/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/2026-08-06T23-02-00.678Z-Dimensions.png)
![Duo MCP2515 CAN bus Castellated Module](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzA0MjQsInB1ciI6ImJsb2JfaWQifX0=--ca1e98a8f8d8a8acc0ac4f283a75a8baf3ff28f2/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2026-08-06T22-07-09.247Z-example-20implementation.jpg)
![Duo MCP2515 CAN bus Castellated Module](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzA0MjUsInB1ciI6ImJsb2JfaWQifX0=--3351a76b2ec26ec7e09b070580c52f481fc0d7c7/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2026-08-06T22-07-09.247Z-IMG_5401.jpg)
![Duo MCP2515 CAN bus Castellated Module](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzA0MjYsInB1ciI6ImJsb2JfaWQifX0=--322e2d6d8854bfb2e9dec3d6b33f9ab65640137d/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJqcGciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--970c165836a83091725a1a0fd4f37ce9408da1bf/2026-08-06T22-07-09.247Z-IMG_5402.jpg)

## Description

#Introduction
The Duo MCP2515 CAN Bus Castellated Module brings dual-channel CAN bus communication to your DIY projects in a compact, castellated footprint. Building on our single-channel Nano MCP2515 CAN bus castellated module, this version packs two independent MCP2515 controllers onto one board — yet by sharing the SPI bus and a single 20MHz oscillator between both chips, the module is only 50% larger than its single-channel predecessor. Its castellated hole design allows for PCB integration using your preferred connector or quick prototyping on a breadboard.

Why two channels? A second CAN controller lets you run two communication channels in parallel. For example, one channel can run at a robust, noise-tolerant low speed for critical data, while the second handles high-rate continuous data. Or split traffic by priority or message type across two buses entirely — something we've leaned on ourselves in past projects to keep time-critical data separate from bulk telemetry. Either way, you get two CAN interfaces without doubling your board space or wiring complexity.

#Features


- Dual CAN Channels: Two independent MCP2515 controllers on a single module, letting you run separate CAN buses at different speeds or split traffic by priority — ideal for combining a robust, low-rate link with a high-rate continuous data stream.
- Efficient Dual-Chip Design: Both MCP2515s share the same SPI bus and a single 20MHz oscillator, keeping the module to just 50% larger than the single-channel Nano MCP2515 despite doubling the CAN capability.
- 20MHz Crystal: A higher-frequency oscillator than the previous design, supporting higher CAN bus communication speeds.
- Slim 0.8mm PCB: Half the thickness of the original 1.6mm design, for a lighter, lower-profile module.
- Castellated Holes: Easily integrate the module into your system by soldering it directly to a PCB or using it on a breadboard.
- Connector Flexibility: Choose your preferred connector to ensure smooth integration with your design.
- SPI Interface: Communicate reliably with both MCP2515 chips over a shared SPI bus, each with its own chip-select line. For additional information, refer to the MCP2515 datasheet and other online resources.
- Power Indicator LED: Quickly confirm that the board is powered and operational.
- 120Ω Termination: Solder jumpers allow for independent bus termination on each channel with a 120Ω resistor, making it ready for integration.

#Resources 
Check out this excellent tutorial by Last Minute ENGINEERS for implementing the device with Arduino. While the tutorial uses a single MCP2515-based module, the same steps apply to each channel of the Duo MCP2515 CAN Bus Castellated Module: https://lastminuteengineers.com/mcp2515-can-module-arduino-tutorial 

Alternatively, visit our GitHub repository to see how to implement the Nano module with an AVR128DA48 Curiosity Nano board: https://github.com/CastellatedDreams/AVR-MCP2515-CANBUS