CANopenNode/CANopenNode
CANopen protocol stack observed · 2026-08-28
Health v2 · maintenance only
64/100
- Activity 91
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4052
- days_rel: n/a
- days_push: 54
- n_releases_24m: 0
Adoption not part of the score
1985 stars · 803 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
CANopenNode is a free and open-source CANopen protocol stack written in ANSI C, implementing the standardized CiA301 (EN 50325-4) higher-layer protocol for embedded control systems on top of CAN. It provides an Object Dictionary plus NMT, Heartbeat, PDO, SDO, Emergency, Sync, Time-stamp, LSS, gateway, and CANopen Safety features, and runs on various microcontrollers either standalone or with an RTOS.
Use cases
- implement a CANopen device on a microcontroller
- add CANopen protocol support to embedded C firmware
- build an NMT master or SDO client to control a CANopen network
- map process variables to PDOs for real-time CAN bus communication
- monitor CANopen nodes with heartbeat producer/consumer error control
- configure node-id and bitrate over the bus with LSS
- bridge CANopen to a PC via the CiA309-3 ASCII gateway
When to choose
- you need a standards-compliant CANopen (CiA301) stack in portable ANSI C
- your target is a resource-constrained microcontroller, with or without an RTOS
- you want the full CANopen feature set: PDO, SDO, NMT, Heartbeat, Emergency, Sync, LSS, Safety
- you need a mature, actively maintained, permissively licensed (Apache-2.0) protocol implementation
When to avoid
- you need CAN (the raw data-link layer) drivers rather than the CANopen higher-layer protocol
- your project is not CAN/CANopen based, e.g. EtherCAT, Modbus, or PROFINET
- you require a stack in a language other than C or with heavy vendor-specific integration out of the box
- you need a ready-made GUI configuration tool rather than an embeddable protocol library
Facets
library · maturity stable
embedded networking middleware sdk embedded-systems iot robotics developer-tools embedded iot c cross-platform canopen can-bus protocol-stack cia301 object-dictionary pdo sdo nmt heartbeat lss ansi-c microcontroller fieldbus industrial-automation rtos automation linux
2 sources
- readme: https://github.com/CANopenNode/CANopenNode · fetched 2026-08-28 · 9aa0bf878965
- homepage: https://canopennode.github.io/CANopenNode/index.html · fetched 2026-08-29 · 4bbe3e850902
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| CANopenNode/CANopenNode | main | 64 |
For agents
markdown · JSON · MCP: product_card(name="CANopenNode/CANopenNode")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem