# aws/aws-iot-device-sdk-embedded-C

SDK for connecting to AWS IoT from a device using embedded C.

Repository: https://github.com/aws/aws-iot-device-sdk-embedded-C
Canonical: https://ross.abutalabs.com/products/aws-iot-device-sdk-embedded-c
Language: C
License: MIT
License Family: permissive
Topics: aws
Last push: 2026-04-22T00:12:35+00:00

## Health v2 (maintenance only)
Score: 58/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 78, release rhythm 8, longevity 100
- inputs: {"age_days": 3997, "days_push": 134, "days_rel": 625, "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 1056, forks 639 (observed 2026-08-28T04:03:24.555062+00:00)

## What it is
AWS's official C SDK for connecting embedded devices to AWS IoT, composed of modular libraries like coreMQTT, coreHTTP, coreJSON, and corePKCS11. It supports device shadow, jobs, device defender, over-the-air updates, and fleet provisioning on resource-constrained hardware.

## Use cases
- connect an embedded device to AWS IoT over MQTT
- implement device shadow in C on a microcontroller
- perform over-the-air firmware updates for IoT devices
- provision IoT devices to AWS at first boot
- send device metrics to AWS IoT Device Defender
- run AWS IoT Jobs on an embedded C client

## When to choose
- building firmware in C for resource-constrained microcontrollers that talk to AWS IoT
- you need modular, per-library integration with an existing embedded codebase
- you want AWS-supported shadow, jobs, OTA, and provisioning clients

## When to avoid
- your device is not connecting to AWS IoT specifically
- you need a high-level SDK with TLS and networking fully bundled for Linux applications
- you prefer Python, JavaScript, or another higher-level language

## Facets
- artifact type: library
- maturity: active
- function: sdk, auth, serialization, cryptography, middleware
- domain: iot, embedded-systems, cloud-computing, apis
- platform: embedded, iot, c, cross-platform
- tags: aws-iot, mqtt, embedded-c, device-shadow, ota-update, fleet-provisioning, coremqtt, pkcs11

## Member repositories
- aws/aws-iot-device-sdk-embedded-C (main) score 58

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:24.555062+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 2026-08-30T06:58:21.327943+00:00, confidence not recorded.
  - readme: https://github.com/aws/aws-iot-device-sdk-embedded-C (fetched 2026-08-28T04:03:24.555062+00:00, sha 6d49cb50b5a4)
- Data as of 2026-08-30T08:39:29.467469+00:00.