# eclipse-paho/paho.mqtt.embedded-c

Paho MQTT C client library for embedded systems.  Paho is an Eclipse IoT project (https://iot.eclipse.org/)

Repository: https://github.com/eclipse-paho/paho.mqtt.embedded-c
Canonical: https://ross.abutalabs.com/products/pahomqttembedded-c
Homepage: https://eclipse.org/paho
Language: C
License: NOASSERTION
License Family: other
Topics: eclipseiot, mqtt, iot, embedded, internet-of-things
Last push: 2026-07-03T15:37:59+00:00

## Health v2 (maintenance only)
Score: 63/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 90, release rhythm 8, longevity 100
- inputs: {"age_days": 3913, "days_push": 61, "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 1539, forks 792 (observed 2026-08-28T04:05:00.352586+00:00)

## What it is
The Eclipse Paho MQTT C/C++ client library for embedded platforms, offering low-level MQTT packet serialization plus higher-level C and C++ client APIs. It is designed for resource-constrained devices with pluggable networking and ports for Linux, Arduino, and ARM mbed.

## Use cases
- connect an embedded device to an MQTT broker
- publish and subscribe to MQTT topics from a microcontroller
- serialize and deserialize MQTT packets in C
- add MQTT support to an Arduino or mbed project
- implement a lightweight IoT messaging client without a full OS
- port an MQTT client to a custom network stack

## When to choose
- you need MQTT on resource-constrained embedded hardware
- you want a minimal C or C++ client with pluggable networking
- you only need packet-level serialization and control over the transport yourself

## When to avoid
- you need a full-featured MQTT client on desktop or server platforms (use paho.mqtt.c or paho.mqtt.python)
- you need MQTT 5 features or async APIs out of the box
- you want a managed runtime with automatic reconnect and TLS handled for you

## Facets
- artifact type: library
- maturity: maintenance
- function: serialization, networking, sdk
- domain: iot, embedded-systems, developer-tools
- platform: embedded, c, cpp, cross-platform
- tags: mqtt, mqtt-client, paho, iot-protocols, messaging-protocol, arduino, mbed, lightweight, messaging, linux

## Member repositories
- eclipse-paho/paho.mqtt.embedded-c (main) score 63

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:00.352586+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 2026-08-30T04:30:53.892856+00:00, confidence not recorded.
  - readme: https://github.com/eclipse-paho/paho.mqtt.embedded-c (fetched 2026-08-28T04:05:00.352586+00:00, sha 24581b19e248)
  - homepage: https://eclipse.org/paho (fetched 2026-08-29T11:32:30.456050+00:00, sha 5a44edd4cbb2)
  - site_page: https://eclipse.dev/paho/documentation (fetched 2026-08-29T11:32:30.458819+00:00, sha f5e1055ce593)
- Data as of 2026-08-30T08:39:29.467469+00:00.