# autowp/arduino-mcp2515

Arduino MCP2515 CAN interface library

Repository: https://github.com/autowp/arduino-mcp2515
Canonical: https://ross.abutalabs.com/products/arduino-mcp2515
Language: C++
License: MIT
License Family: permissive
Topics: arduino, mcp2515, can, can-bus
Last push: 2026-02-27T18:42:36+00:00

## Health v2 (maintenance only)
Score: 57/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 69, release rhythm 16, longevity 100
- inputs: {"age_days": 3825, "days_push": 187, "days_rel": 346, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1025, forks 325 (observed 2026-08-28T04:03:16.581309+00:00)

## What it is
An Arduino library for interfacing with the MCP2515 stand-alone CAN controller over SPI. It implements CAN V2.0B at up to 1 Mb/s with support for standard and extended frames, masks, and filters.

## Use cases
- send and receive CAN bus messages from an Arduino
- build an OBD-II vehicle diagnostic device or data logger
- communicate between microcontrollers over CAN
- set receive masks and filters for CAN frames
- wire a DIY CAN node with MCP2515 and MCP2551

## When to choose
- you use an Arduino or Seeeduino with an MCP2515-based CAN shield or board
- you need standard and extended CAN 2.0B frames at up to 1 Mb/s
- you want a lightweight, MIT-licensed C++ CAN driver with examples

## When to avoid
- your board has a native CAN peripheral and does not need the MCP2515 chip
- you need CAN FD, which the MCP2515 does not support
- you are not on an Arduino-compatible embedded platform

## Facets
- artifact type: library
- maturity: stable
- function: embedded, sdk
- domain: embedded-systems, hardware
- platform: embedded, cpp, iot
- tags: arduino, mcp2515, can-bus, spi, obd-ii, automotive

## Member repositories
- autowp/arduino-mcp2515 (main) score 57

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:16.581309+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:08:02.572980+00:00, confidence not recorded.
  - readme: https://github.com/autowp/arduino-mcp2515 (fetched 2026-08-28T04:03:16.581309+00:00, sha f67497472845)
- Data as of 2026-08-30T08:39:29.467469+00:00.