# project-chip/connectedhomeip

Matter (formerly Project CHIP) creates more connections between more objects, simplifying development for manufacturers and increasing compatibility for consumers, guided by the Connectivity Standards Alliance.

Repository: https://github.com/project-chip/connectedhomeip
Canonical: https://ross.abutalabs.com/products/connectedhomeip
Homepage: https://buildwithmatter.com
Language: C++
License: Apache-2.0
License Family: permissive
Topics: standard, internet-of-things, iot, chip, connectedhomeip, connected-devices, connected-home, build-with-matter, matter, connectivity-standards-alliance, csa-iot
Last push: 2026-08-26T23:32:05+00:00

## Health v2 (maintenance only)
Score: 90/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 74, longevity 100
- inputs: {"age_days": 2374, "days_push": 7, "days_rel": 13, "gap_med": 132, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 8902, forks 2455 (observed 2026-08-28T04:10:26.212128+00:00)

## What it is
The official open-source SDK for Matter (formerly Project CHIP), the Connectivity Standards Alliance's IP-based smart home connectivity standard. It provides the data model, networking, security, and commissioning layers needed to build interoperable Matter devices and controllers across many chip platforms.

## Use cases
- build a Matter-certified smart home device
- implement a Matter controller or commissioner app
- add Matter support to an ESP32 or embedded firmware
- develop a Thread or Wi-Fi connected home accessory
- test interoperability between Matter devices
- port the Matter stack to a new SoC platform

## When to choose
- you are building or certifying a Matter end device or controller
- you need the reference implementation maintained by the CSA
- you target supported platforms like ESP32, Nordic, Silicon Labs, TI, or Linux

## When to avoid
- you need Zigbee, Z-Wave, or other non-Matter protocols
- you want a high-level consumer smart home app rather than device SDK work
- your platform is not among the supported chip vendors

## Facets
- artifact type: library
- maturity: active
- function: sdk, security, networking, embedded
- domain: iot, embedded-systems, cross-platform
- platform: embedded, iot, windows, cross-platform, cpp
- tags: matter, smart-home, thread, ble, wifi, connectivity-standards-alliance, chip, home-automation, device-certification, linux, macos, android, ios

## Member repositories
- project-chip/connectedhomeip (main) score 90

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:26.212128+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 2026-08-29T17:24:43.600665+00:00, confidence not recorded.
  - readme: https://github.com/project-chip/connectedhomeip (fetched 2026-08-28T04:10:26.212128+00:00, sha 48f59c2ee6e5)
  - homepage: https://buildwithmatter.com (fetched 2026-08-29T08:25:07.849563+00:00, sha 371df7ceb9dc)
  - site_page: https://csa-iot.org/about/board-officers (fetched 2026-08-29T08:25:07.859125+00:00, sha 116f9b64714b)
  - site_page: https://csa-iot.org/about (fetched 2026-08-29T08:25:07.862245+00:00, sha 0417a9484f3f)
  - site_page: https://csa-iot.org/all-solutions/matter/matter-faq (fetched 2026-08-29T08:25:07.893930+00:00, sha fb6de062aece)
- Data as of 2026-08-30T08:39:29.467469+00:00.