# Blynk-Technologies/blynk-library

Blynk library for IoT boards. Works with Arduino, ESP32, ESP8266, Raspberry Pi, Particle, etc.

Repository: https://github.com/Blynk-Technologies/blynk-library
Canonical: https://ross.abutalabs.com/products/blynk-library
Homepage: https://blynk.io
Language: C++
License: MIT
License Family: permissive
Topics: arduino, esp8266, esp32, embedded, hardware, raspberry-pi, gsm, ota, iot, internet-of-things, espressif, iot-platform, wifi, cellular, particle-io, platformio-library, ethernet, lte
Last push: 2026-05-26T07:47:51+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 84, release rhythm 54, longevity 100
- inputs: {"age_days": 4180, "days_push": 99, "days_rel": 99, "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 3989, forks 1398 (observed 2026-08-28T04:08:31.785225+00:00)

## What it is
Blynk's official C++ client library that connects over 400 IoT hardware boards (Arduino, ESP32, ESP8266, Raspberry Pi, Particle, etc.) to the Blynk Cloud IoT platform. It provides the firmware-side API for sending sensor data, controlling GPIOs via virtual pins, and receiving OTA firmware updates.

## Use cases
- connect an ESP32 to the cloud and read sensor data from a mobile app
- control Arduino GPIO pins remotely from iOS or Android
- push telemetry from a Raspberry Pi to an IoT dashboard
- add OTA firmware updates to an ESP8266 device
- build a smart home device with a drag-and-drop mobile interface
- connect hardware over WiFi, Ethernet, GSM, or LTE to a managed IoT cloud
- prototype an IoT product with device provisioning and dashboards

## When to choose
- you want a low-code IoT platform with hosted cloud, mobile apps, and dashboards
- your project uses Arduino, ESP32/ESP8266, Particle, or other supported boards
- you need OTA updates, device provisioning, and fleet management out of the box
- you prefer not to build your own backend and mobile app for device control

## When to avoid
- you need a fully self-hosted, vendor-independent IoT stack with no cloud dependency
- your board or connectivity shield is not among the supported hardware
- you only need raw MQTT or HTTP communication without platform services
- you require full control over firmware networking code with no proprietary cloud

## Facets
- artifact type: library
- maturity: stable
- function: iot, sdk, networking, embedded
- domain: iot, embedded-systems, hardware, cloud-computing
- platform: embedded, iot, cross-platform, cpp
- tags: arduino, esp32, esp8266, raspberry-pi, ota-updates, mqtt, blynk-cloud, wifi, cellular, firmware, automation

## Member repositories
- Blynk-Technologies/blynk-library (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:31.785225+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 2026-08-29T18:24:13.311072+00:00, confidence not recorded.
  - readme: https://github.com/Blynk-Technologies/blynk-library (fetched 2026-08-28T04:08:31.785225+00:00, sha a5c4ad05fd49)
  - homepage: https://blynk.io (fetched 2026-08-29T09:17:32.508545+00:00, sha d3b90c2b2efb)
  - site_page: https://www.blynk.io/about (fetched 2026-08-29T09:17:32.513817+00:00, sha 2bba21a03e82)
  - site_page: https://www.blynk.io/getting-started (fetched 2026-08-29T09:17:32.515820+00:00, sha fd5acc4d51e1)
  - site_page: https://docs.blynk.io/en (fetched 2026-08-29T09:17:32.517619+00:00, sha 90f4fbb094bd)
  - site_page: https://docs.blynk.io/en?_gl=1%2A32znp9%2A_gcl_au%2AMTc2MDI0MDY1OC4xNzU1OTgxOTQx%2A_ga%2AMTg5MjE5Nzk4NS4xNzE3NDc5Njk3%2A_ga_E376ZQ635Y%2AczE3NTU5OTA1ODQkbzUzJGcxJHQxNzU1OTkwNzg5JGo2MCRsMCRoMA..%2A_ga_J0GP1NPNB7%2AczE3NTU5OTA1ODMkbzUzJGcxJHQxNzU1OTkwNzg5JGo2MCRsMCRoMA.. (fetched 2026-08-29T09:17:32.519494+00:00, sha 90f4fbb094bd)
  - site_page: https://docs.blynk.io/en?_gl=1%2A1le0yeg%2A_gcl_au%2AMTc2MDI0MDY1OC4xNzU1OTgxOTQx%2A_ga%2AMTg5MjE5Nzk4NS4xNzE3NDc5Njk3%2A_ga_E376ZQ635Y%2AczE3NTU5OTA1ODQkbzUzJGcxJHQxNzU1OTkxODUyJGo2MCRsMCRoMA..%2A_ga_J0GP1NPNB7%2AczE3NTU5OTA1ODMkbzUzJGcxJHQxNzU1OTkxODUyJGoyOSRsMCRoMA.. (fetched 2026-08-29T09:17:32.521451+00:00, sha 90f4fbb094bd)
  - site_page: https://www.blynk.io/pricing (fetched 2026-08-29T09:17:32.511434+00:00, sha 7266d17f4f98)
  - site_page: https://www.blynk.io/platform/hardware-and-connectivity (fetched 2026-08-29T09:17:32.523377+00:00, sha 8967c02b7b0f)
- Data as of 2026-08-30T08:39:29.467469+00:00.