# ARMmbed/mbed-os

Arm Mbed OS is a platform operating system designed for the internet of things

Repository: https://github.com/ARMmbed/mbed-os
Canonical: https://ross.abutalabs.com/products/mbed-os
Homepage: https://mbed.com
Language: C
License: NOASSERTION
License Family: other
Last push: 2024-10-08T17:44:17+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4944, "days_push": 694, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4870, forks 3015 (observed 2026-08-28T04:09:01.645135+00:00)

## What it is
Arm Mbed OS is an open-source embedded operating system for IoT devices built on Arm Cortex-M microcontrollers, providing an RTOS, security foundations, connectivity, and drivers for sensors and I/O. Arm has announced end-of-life; the community fork Mbed CE is now the actively maintained continuation.

## Use cases
- build a connected IoT product on an Arm Cortex-M microcontroller
- run an RTOS with sensor and I/O drivers on embedded hardware
- add security and cloud connectivity to an embedded device
- develop firmware for Mbed-compatible development boards
- port an embedded OS to custom microcontroller hardware

## When to choose
- you are maintaining an existing Mbed OS project
- you want a mature, Apache-2.0 licensed embedded OS with built-in security and connectivity
- you are evaluating Mbed CE, the community fork, for new work

## When to avoid
- you are starting a new project - Arm has sunset Mbed and no longer maintains it
- you need long-term vendor support or updated tooling
- your hardware is not Arm Cortex-M based

## Facets
- artifact type: framework
- maturity: abandoned
- function: embedded, security, networking, cryptography
- domain: iot, embedded-systems, operating-systems
- platform: embedded, iot, cpp, c
- tags: rtos, arm-cortex-m, microcontroller, sunset-project, mbed-ce

## Member repositories
- ARMmbed/mbed-os (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:01.645135+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 2026-08-29T18:18:19.273060+00:00, confidence not recorded.
  - readme: https://github.com/ARMmbed/mbed-os (fetched 2026-08-28T04:09:01.645135+00:00, sha 369c9e6e406b)
  - homepage: https://mbed.com (fetched 2026-08-29T09:00:46.048371+00:00, sha 71c2753df666)
- Data as of 2026-08-30T08:39:29.467469+00:00.