# mysensors/MySensors

MySensors library and examples

Repository: https://github.com/mysensors/MySensors
Canonical: https://ross.abutalabs.com/products/mysensors
Homepage: https://www.mysensors.org
Language: C++
License Family: other
Topics: mysensors, iot, home-automation, arduino, samd, esp8266, raspberry, diy, nrf5x, esp32, teensyduino, stm32
Last push: 2026-04-18T10:08:30+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": 4606, "days_push": 137, "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 1356, forks 890 (observed 2026-08-28T04:04:29.299478+00:00)

## What it is
MySensors is an open-source C++ library and example collection for building DIY wireless sensor and actuator networks on Arduino, ESP8266/ESP32, NRF5x, SAMD, STM32, Teensy, and Raspberry Pi hardware. It handles secure node-to-gateway communication over radios like nRF24L01+, RFM69, and LoRa, integrating with 20+ home automation controllers via serial, MQTT, or Ethernet gateways.

## Use cases
- build diy wireless temperature sensors with arduino
- connect battery-powered sensor nodes to home assistant
- create an mqtt gateway for custom iot sensors
- add secure signed communication to arduino sensor nodes
- update sensor firmware over the air (fota)
- build low-power battery-operated actuators and sensors

## When to choose
- you want cheap, self-hosted DIY sensors for a home automation controller
- you need multi-radio support (nRF24L01+, RFM69, LoRa, RS485) with one API
- you want signing, FOTA, and low-power features out of the box

## When to avoid
- you need a plug-and-play commercial smart home solution without soldering
- your project requires a formally licensed library - the repo has no explicit license file
- you need modern IP-based IoT protocols like Matter or Thread

## Facets
- artifact type: library
- maturity: active
- function: sdk, security, iot, message-queue, middleware
- domain: iot, embedded-systems, self-hosted
- platform: embedded, iot, cpp, cross-platform
- tags: arduino, home-automation, wireless-sensors, nrf24l01, rfm69, esp8266, esp32, raspberry-pi, gateway, fota, mqtt, diy-sensors, automation, linux

## Member repositories
- mysensors/MySensors (main) score 58

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:29.299478+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 2026-08-30T04:41:55.185568+00:00, confidence not recorded.
  - readme: https://github.com/mysensors/MySensors (fetched 2026-08-28T04:04:29.299478+00:00, sha 673a98be2b20)
  - homepage: https://www.mysensors.org (fetched 2026-08-29T12:00:15.058149+00:00, sha 0604779f153e)
  - site_page: https://www.mysensors.org/about (fetched 2026-08-29T12:00:15.067620+00:00, sha 35c61e868d09)
  - site_page: https://www.mysensors.org/about/overview (fetched 2026-08-29T12:00:15.069778+00:00, sha 5cd4f3313d80)
  - site_page: https://www.mysensors.org/about/mysensors (fetched 2026-08-29T12:00:15.071672+00:00, sha c0a7dc22fe31)
  - site_page: https://www.mysensors.org/about/components (fetched 2026-08-29T12:00:15.073598+00:00, sha bac6cee1a2cf)
  - site_page: https://www.mysensors.org/about/iot (fetched 2026-08-29T12:00:15.075406+00:00, sha a4b4ee433dc2)
- Data as of 2026-08-30T08:39:29.467469+00:00.