Brokers

• NanoMQ (⭐2.4k) - A light-weight and Blazing-fast MQTT Broker for IoT Edge platform.

Tools

• mqtt_monitor (⭐9) - Simple and lightweight console moniotor for mqtt topics, with eye-candies, in python 3.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• can2mqtt (⭐100) - CAN-Bus - MQTT Bridge (also works vice versa).

• gardena2mqtt (⭐12) - Docker Gateway to control GARDENA Smart system devices (Sileno mower, Irrigation Control, etc.) through MQTT.

• zwavejs2mqtt (⭐1.2k) - Zwave to Mqtt gateway and Control Panel Web UI.

Misc / Firmwares for ESP based Devices

• serial2mqtt (⭐146) - A Linux gateway to connect low-cost microcontrollers only with a serial port to MQTT.

Visualization, Dashboards / Firmwares for ESP based Devices

• MYHELLOIOT - MQTT dashboard application.

• PlotJuggler (⭐5.6k) - Visualize time series (from sources such as: MQTT, Websockets, ZeroMQ, UDP, etc., supports data formats such as JSON, CBOR, BSON, Message Pack, etc.). It is a fast, powerful and intuitive cross-platform tool.

Tools

• MQTT TUI (⭐607) - Simple lightweight terminal based MQTT monitor and publisher.

Telephony, PBX / Firmwares for ESP based Devices

• sms2mqtt (⭐65) - Docker Gateway to send/receive SMS through MQTT using an USB GSM dongle (gammu).

Misc / Firmwares for ESP based Devices

• chrome2mqtt (⭐22) - Python program to enable MQTT control endpoints for chromecasts (both audio and video).

Visualization, Dashboards / Firmwares for ESP based Devices

• MQTT-Tiles (⭐110) - MQTT-based IoT dashboard visualization tool. Allows easy dashboards sharing. Works with any MQTT broker supporting the WSS protocol.

Community Resources

• MQTT community wiki (⭐5.1k)

Brokers

• Ably - MQTT broker service and protocol adapter.

Cloud

• HiveMQ Cloud - Cloud managed MQȚT service.

Tools

• mqtt_recorder (⭐34) - Simple cli tool for recording and replaying MQTT messages.

Makers

• deskmate (⭐68) - A hackable & portable MQTT-powered mini dashboard and control center.

Makers / ESP

• mqtt-ir-transceiver (⭐145) - ESP8266 based bidirectional gateway between MQTT and IR. Use with PlatformIO.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• aqara2mqtt (⭐6) - Attach Aqara Smart Hubs to MQTT.

Community Resources

• mqtt.org

Talks

• Einführung in MQTT - Dominik Obermaier & Jens Deters, Building IoT conference 2016 (German).

Makers / ESP

• mqtt-with-micropython - Connect to MQTT with micropython and wipy/others (ESP32 inside).

Makers / Firmwares for ESP based Devices

• OpenMQTTGateway (⭐3.9k) - MQTT gateway for ESP8266, ESP32, Sonoff RF Bridge or Arduino with bidirectional 433mhz/315mhz/868mhz, Infrared communications, BLE, beacons detection, mi flora, mi jia, LYWSD02, LYWSD03MMC, Mi Scale compatibility, SMS & LORA.

Smart Home Integration Software / Firmwares for ESP based Devices

• homekit2mqtt (⭐357) - Interface between HAP-NodeJS (⭐2.7k) and MQTT. Control MQTT connected devices with Siri or HomeKit Apps.

Brokers

• Waterstream - MQTT broker leveraging Apache Kafka as its own storage and distribution engine.

Tools

• mqtt-mirror (⭐42) - Mirror MQTT traffic from one broker to another. Available as a CLI tool, Helm chart or Docker image.

Misc / Firmwares for ESP based Devices

• MQTT Joystick Controller (⭐8) - Open Source Android app that lets you control everything with your smartphone. Download it from Google Play.

Brokers

• KMQTT (⭐272) - Kotlin Multiplatform MQTT broker, both embeddable and standalone.

Misc / Firmwares for ESP based Devices

• mqtt-transformer (⭐15) - A simple service which consumes, transforms and periodically republish json messages on MQTT.

Visualization, Dashboards / Firmwares for ESP based Devices

• mqtt-prometheus-message-exporter (⭐21) - A small service which will convert mqtt messages to prometheus metrics.

Misc / Firmwares for ESP based Devices

• MQTT.Cool - A web gateway that optimizes any MQTT broker when sending real-time data to web clients with automatic throttling.

Visualization, Dashboards / Firmwares for ESP based Devices

• MQTT.Cool Test Client - A web interface for testing interaction between MQTT.Cool and any MQTT broker.

Brokers

• Aedes (⭐1.9k) - Barebone MQTT broker that can run on any stream server, the node way.

Visualization, Dashboards / Firmwares for ESP based Devices

• MQTT-Hyperdash (⭐10) - A universal independent MQTT Dashboard for Linux/Raspberry Pi.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• mqtt-unifi-protect-bridge (⭐24) - Adding motion-status from UniFi Protect Cameras to MQTT.

Cloud

• Adafruit IO - Data-oriented IoT framework and libraries.

Python

• MiniMQTT (⭐81) - MQTT Client Library for CircuitPython.

Misc / Firmwares for ESP based Devices

• mqtt-camera-streamer (⭐250) - Stream images from a connected camera over MQTT & view using Streamlit.

Cloud

• Alibaba Cloud IoT Platform - Provides secure and reliable communication between devices and the IoT Platform which allows you to manage a large number of devices on a single IoT Platform.

• Azure IoT Hub - Enable highly secure and reliable communication between your IoT application and the devices it manages. Azure IoT Hub provides a cloud-hosted solution backend to connect virtually any device. Extend your solution from the cloud to the edge with per-device authentication, built-in device management, and scaled provisioning.

• flespi - Free and secure cloud MQTT broker with private namespaces, MQTT 3.1.1 and MQTT 5.0 support and gorgeous limits.

Dart

• mqtt.dart (⭐51) - Dart MQTT client.

Rust

• rumqtt (⭐204) - A fast, lock free pure Rust MQTT client.

Makers / ESP

• ESP32-BLE2MQTT (⭐749) - BLE to MQTT bridge, exposes BLE GATT characteristics as MQTT topics for bidirectional communication.

• ESP8266MQTTMesh (⭐265) - MQTT over mesh WiFi integrated library for ESP8266.

• esp_mqtt (⭐1.2k) - MQTT client library for ESP8266.

• nodemcu-gpiomqtt (⭐10) - Lua script to connect ESP8266 GPIOs to MQTT.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• ipcam2mqtt (⭐26) - A small FTP server to receive movement images from ipcameras and turn them into MQTT alerts.

Misc / Firmwares for ESP based Devices

• AlexaMqttBridge (⭐108) - Bridge between Amazon Alexa and MQTT.

• buderus2mqtt (⭐18) - Bridge between Buderus KM200 internet gateway and MQTT.

• kobold2mqtt (⭐2) - Bridge between Vorwerk Kobold Vr200 internet gateway and MQTT.

• leaf-python-mqtt (⭐27) - Extract data from Nissan Leaf API and post to MQTT.

Visualization, Dashboards / Firmwares for ESP based Devices

• mqtt2highcharts (⭐62) - Plotting live numbered data from a subscribed MQTT topic using Highcharts.

Security, Encryption / Firmwares for ESP based Devices

• Teserakt E4 - End-to-end encryption and key management for MQTT and other M2M protocols – Open-source and paid plans.

Cloud

• CloudMQTT - Hosted message broker for the Internet of Things. Perfectly configured and optimized message queues for IoT, ready in seconds.

• Google Cloud IoT - Cloud managed MQTT service.

Makers / Firmwares for ESP based Devices

• ESPEasy - Turns ESP into a multifunction sensor device for HA solutions with web-based configuration.

• ESPHome - Builds ESP8266/ESP32 firmware from concise YAML descriptions, uploads to and manages flashed devices.

• Espurna (⭐3k) - HA firmware for ESP8266-based devices with rich web UI and ≈120 devices supported out of the box.

• Sonoff-Tasmota (⭐24k) - Firmware for ESP8266 devices with web-based configuration. ≈500 devices supported (not only Sonoffs).

• WiFi-IoT - ESP8266/ESP32 firmware builder. Partly in Russian. Free features are limited.

Brokers

• EMQ X (⭐16k) - Scalable and Reliable Real-time MQTT Messaging Engine for IoT in 5G Era.

Tools

• MQTT.fx - MQTT Client written in Java based on Eclipse Paho. Supports scripting.

• MQTTX (⭐4.7k) - Cross-platform MQTT desktop client open sourced by EMQ, which supports macOS, Linux, and Windows.

Makers

• Basecamp (⭐257) - An Arduino library to ease the use of the ESP32 in IoT projects. See c't Magazin 2'2018 (German).

Smart Home Integration Software / Firmwares for ESP based Devices

• Domoticz - Home Automation system with MQTT support.

Smart Metering / Firmwares for ESP based Devices

• bcontrol2mqtt (⭐3) - Publish measurements from TQ Energy Manager / Busch-Jäger Energy Monitor to MQTT.

Misc / Firmwares for ESP based Devices

• MQTT2ETCD (⭐2) - MQTT-ETCD gateway: PUT keys on ETCD through MQTT, and watch ETCD key changes on MQTT topics.

Visualization, Dashboards / Firmwares for ESP based Devices

• Crouton (⭐295) - A dashboard that taps into your IOT network, using only MQTT and JSON.

Brokers

• HiveMQ - Java MQTT Broker that supports MQTT 3.1, 3.1.1 and 5.0. Commercial and open source editions available.

Tools

• hivemq-mqtt-web-client (⭐361) - Browser-based MQTT client that utilizes MQTT over websockets. Direct Link

• MQTT CLI (⭐354) - A command line interface for connecting various MQTT clients supporting MQTT 5.0 and 3.1.1.

Python

• aiomqtt (⭐55) - Async Python MQTT client based on paho-mqtt.

Java

• hivemq-mqtt-client (⭐1k) - High-performance Java MQTT client library with different API flavours for MQTT 5.0 and 3.1.1.

Tools

• SimpleMQTT - A Slack app to send messages from Slack to MQTT brokers with slash commands.

Erlang or Elixir

• emqttc (⭐428) - Asynchronous Erlang MQTT Client.

Delphi

• TMQTTClient (⭐24) - MQTT Client Library for Delphi. Alpha and long term unmaintained.

Swift

• CocoaMQTT (⭐1.7k) - MQTT for iOS and macOS written with Swift.

DotNET

• MQTTnet (⭐4.9k) - MQTT client and broker .NET implementations.

Monitoring / Firmwares for ESP based Devices

• mqtt2notifysend (⭐14) - Subscribe to a topic and show notifications from MQTT messages on Ubuntu & other notify-send compatible Linux distros.

Logging / Firmwares for ESP based Devices

• mqtt2mongodb (⭐18) - Subscribe to MQTT topics and insert into MongoDB.

Platforms

• mainflux - Device management, data aggregation, data management, data analytics,connectivity and message routing and event management. Supported by Linux Software Foundation.

• thingsboard - Device management, data collection, processing, event management, and visualization for your IoT projects.

Tools

• MIMIC MQTT Simulator - Simulate up to 100,000 MQTT clients per server for development/testing/deployment of IoT applications.

Python

• gmqtt (⭐436) - Python MQTT v5.0 client (asyncio-based).

Lua

• luamqtt (⭐175) - Pure-lua MQTT v3.1.1 and v5.0 client.

Brokers

• Moquette (⭐2.4k) - Java MQTT lightweight broker.

Tools

• mqtt-malaria (⭐267) - Scalability and load testing utilities for MQTT environments.

Messaging / Firmwares for ESP based Devices

• mqttwarn (⭐975) - Subscribe to MQTT topics (with wildcards) and notify pluggable services.

Smart Home Integration Software / Firmwares for ESP based Devices

• Homegear - Built in MQTT support.

Visualization, Dashboards / Firmwares for ESP based Devices

• d3-MQTT-Topic-Tree (⭐98) - A MQTT Topic Tree viewer using the d3 collapsible tree and MQTT over websockets.

Tools

• MQTT Explorer - Tool to visualize your MQTT topics in a topic hierarchy, a MQTT swiss-army knife.

Misc / Firmwares for ESP based Devices

• Valetudo (⭐8.4k) - Xiaomi (Roborock) Vacuum Robots Firmware with MQTT and Webinterface.

Tools

• mqtt-stats (⭐11) - Subscriber client to monitor MQTT Topic Statistics.

Tools

• mqtt_tree (⭐6) - Displays all Topics in an expandable tree, helps to get an overview if you have a lot of clients publishing. (python, tkinter)

Industry / Firmwares for ESP based Devices

• spicierModbus2mqtt (⭐67) - Modbus master which publishes register values via MQTT.

Brokers

• MyQttHub - Cloud MQTT broker.

• SurgeMQ - High Performance MQTT Server and Client Libraries in Go.

Industry / Firmwares for ESP based Devices

• OPC Router - MQTT Gateway (publisher/subscriber) with various plug-ins (OPC UA Bridge, SQL Bridge, REST Bridge, SAP Bridge).

Location Tracking / Firmwares for ESP based Devices

• OwnTracks - Location tracking and geofencing for MQTT.

Brokers

• hrotti (⭐126) - A MQTT broker written in Go.

Tools

• IoT-Testware - The Eclipse IoT-Testware is a collection of conformance test suites for IoT protocols enriched with additional tools for fuzzing and performance testing.

• MQTT Board (⭐101) - Open-source diagnostic-oriented MQTT client tool.

• mqttcli (⭐124) - MQTT Client for shell scripting.

• MQTTInspector (⭐69) - A general MQTT testing app for iOS (iPhone and iPad).

• MQTTLens - A Google Chrome application, which connects to a MQTT broker and is able to subscribe and publish to MQTT topics.

JavaScript

• MQTT.js - MQTT client for Node.js.

Erlang or Elixir

• mqttex (⭐46) - MQTT implementation in Elixir.

C or C++

• mqtt_cpp (⭐475) - MQTT client for C++14 based on Boost.Asio.

Clojure

• Machine Head (⭐79) - A Clojure MQTT Client.

Objective-C

• MQTTKit (⭐461) - MQTT Objective-C client for iOS.

Swift

• Moscapsule (⭐275) - MQTT Client for iOS written in Swift.

Operating System / Firmwares for ESP based Devices

• mqttlauncher (⭐188) - Execute shell commands triggered by published MQTT messages.

Logging / Firmwares for ESP based Devices

• mqttcollect (⭐22) - A collectd "Exec" plugin for MQTT.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• mqtt2homekit (⭐39) - Roughly the opposite of homekit2mqtt (⭐357): Control your HomeKit-enabled devices with MQTT and without Siri or iPhone.

Smart Home Integration Software / Firmwares for ESP based Devices

• Home.Pi (⭐190) - Based on MQTT.

Home Entertainment / Firmwares for ESP based Devices

• kodi2mqtt (⭐89) - Interface between a Kodi media center instance and MQTT.

• MQTT-DashCast-Docker (⭐5) - MQTT Docker to launch DashCast session on Chromecast.

Misc / Firmwares for ESP based Devices

• bt-mqtt-gateway (⭐559) - Easily extensible Bluetooth to MQTT gateway, currently supports: EQ3 smart thermostat, Xiaomi Mi Scale, Linak Desk, MySensors and Xiaomi Mi Flora plant sensor.

Visualization, Dashboards / Firmwares for ESP based Devices

• node-red-dashboard (⭐1.4k) - A dashboard UI for Node-RED.

Misc / Firmwares for ESP based Devices

• snowboy2mqtt (⭐6) - Publish MQTT Messages on Snowboy Hotword Detection.

Industry / Firmwares for ESP based Devices

• CODESYS-MQTT (⭐133) - A MQTT client for CODESYS PLC.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• knx-mqtt-bridge (⭐40) - Bridges KNX and MQTT using the knx.js library.

Misc / Firmwares for ESP based Devices

• gBridge (⭐170) - Control (almost) any smart home device, any smart home software, with Google Assistant. Therefore, it transforms actions received from Google by voice commands to MQTT messages.

Brokers

• Mystique (⭐24) - An extendable MQTT broker written in Go, with HTTP capabilities for observability. Implements MQTT v3.1.1.

Tools

• mqtt-client (⭐17) - Simple MQTT Client command line (Python) (use paho lib).

Security, Encryption / Firmwares for ESP based Devices

• MQTT-PWN (⭐425) - IoT Broker penetration-testing and security assessment operations.

Lighting / Firmwares for ESP based Devices

• sunricher-wifi-mqtt (⭐18) - Control Sunricher LED devices using MQTT.

Telephony, PBX / Firmwares for ESP based Devices

• sip2mqtt (⭐44) - A SIP monitoring script that publishes incoming calls with CallerID to MQTT.

Talks

• An Introduction to MQTT: Why HTTP isn't the King of the Internet of Things - Shinji Kim, Robert Bird - Akamai, Samsung Developer Conference 2017.

Lighting / Firmwares for ESP based Devices

• Arilux_AL-LC0X (⭐189) - This is an alternative firmware for Arilux LED controllers which uses MQTT.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• mcsMQTT - Plug-in for HS3 (HomeSeer).

Tools

• moxy (⭐23) - A Golang MQTT proxy providing useful output traces to monitor and troubleshoot your MQTT communications.

• mqtt-shell (⭐17) - A simple interactive shell for MQTT.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• homeeToMqtt (⭐13) - Bidirectional Interface between homee and MQTT.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• zigbee2mqtt (⭐14k) - Allows you to use your Zigbee devices without the vendors (Xiaomi/TRADFRI/Hue) bridge/gateway.

Brokers

• Emitter (⭐4k) - A distributed, scalable and fault-tolerant publish-subscribe messaging platform based on MQTT protocol and featuring message storage.

C or C++

• MQTT-C (⭐870) - A portable MQTT C client for embedded systems and PCs alike.

Architecture, Convention / Firmwares for ESP based Devices

• The Homie Convention (⭐740) - A lightweight MQTT convention for the IoT.

JavaScript

• mqtt-wrapper - Polymer Element that wraps other Elements and links them to MQTT topics.

Logging / Firmwares for ESP based Devices

• mqtt2elasticsearch (⭐3) - Send MQTT messages to Elasticsearch.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• xiaomi2mqtt (⭐27) - Bridge between the Xiaomi Smart Home Gateway Aquara and a MQTT server.

Blogs

• Jan-Piet Mens

Misc / Firmwares for ESP based Devices

• node-mqtt-for-anki-overdrive (⭐63) - Node.js Controller and MQTT API for Anki Overdrive.

• parrot-sample (⭐18) - Sample code which uses MQTT to control a Parrot AR Drone.

Misc / Firmwares for ESP based Devices

• speedtest2mqtt (⭐15) - Run speedtest-cli and publish results via MQTT.

Misc / Firmwares for ESP based Devices

• unifi2mqtt (⭐74) - Publish connected clients from Ubiquiti Unifi to MQTT.

Home Entertainment / Firmwares for ESP based Devices

• sonos2mqtt (⭐77) - A bridge between Sonos and MQTT.

Home Entertainment / Firmwares for ESP based Devices

• mopidy-mqtt (⭐23) - MQTT features for Mopidy.

Objective-C

• MQTT-Client-Framework (⭐1.9k) - iOS, macOS, tvOS native ObjectiveC MQTT Client Framework.

Tools

• mqtt-utils (⭐12) - A collection of MQTT utilities.

• mqtt-wildcard (⭐14) - Node.js Module to match a MQTT Topic against wildcards.

C or C++

• wolfMQTT - A client implementation of the MQTT written in C for embedded use. It supports SSL/TLS via the wolfSSL library.

TCL

• tcl-mqtt (⭐5) - Small library to connect to a MQTT broker. Very, very basic, and not maintained.

Makers

• arduinoTemps2mqtt (⭐14) - Arduino sketch, grab One-wire Temperature's and publish to a MQTT broker.

Monitoring / Firmwares for ESP based Devices

• notify-by-mqtt (⭐16) - A Nagios/Icinga notification module which wraps data into JSON and fires it off to an MQTT broker.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• helios2mqtt (⭐7) - A daemon for syncing a helios easy controls system like my KWL EC 220D to MQTT.

• node-lox-mqtt-gateway (⭐27) - Gateway for Loxone™ mini server to communicate with MQTT broker.

Home Entertainment / Firmwares for ESP based Devices

• mqtt2tivoremote (⭐4) - Make TiVo DVR remote control available through an MQTT smarthome style interface.

Misc / Firmwares for ESP based Devices

• homely (⭐17) - Collection of Go daemons for connecting Domoticz and other stuff.

Tools

• mqtt-forget (⭐10) - Command line tool to remove retained MQTT topics by wildcard.

Visualization, Dashboards / Firmwares for ESP based Devices

• MMM-mqtt (⭐16) - This is an extension for the MagicMirror². It provides the ability to subscribe to MQTT topics and display them.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• HS100toMQTT (⭐16) - Gateway between TPLink HS100/HS110 and MQTT.

Home Entertainment / Firmwares for ESP based Devices

• htd2mqtt (⭐3) - Bridge between an HTD Lync audio system and MQTT.

Misc / Firmwares for ESP based Devices

• mqttclpro (⭐107) - MQTT Client with tasker integration Android app.

Monitoring / Firmwares for ESP based Devices

• nag2mqtt (⭐7) - Nagios event broker to MQTT gateway.

Misc / Firmwares for ESP based Devices

• mqttDB (⭐26) - A JSON store with MQTT interface.

Operating System / Firmwares for ESP based Devices

• WinThing (⭐102) - Remotely control Windows through MQTT.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• domiqtt (⭐2) - Connects to a Domiq Base (LCN) and translate from and to MQTT.

Misc / Firmwares for ESP based Devices

• miflora-mqtt-daemon (⭐626) - Linux service to send Xiaomi Mi Flora plant sensor data to an MQTT broker.

Lighting / Firmwares for ESP based Devices

• MQTT DMX Controller (⭐71) - DMX Controller with MQTT support.

• mqtt-dmx-sequencer (⭐26) - Headless counterpart to MQTT DMX Controller - use scenes and sequences exported from the MQTT DMX Controller and control them via MQTT.

Home Entertainment / Firmwares for ESP based Devices

• broadlink-mqtt (⭐235) - MQTT client to control BroadLink RM devices.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• smartthings-mqtt-bridge (⭐375) - Bridge between SmartThings and MQTT.

Blogs

• Nick O'Leary

Brokers

• esp_uMQTT_broker (⭐308) - A basic MQTT Broker on the ESP8266.

Blogs

• Ben Hardill

Lighting / Firmwares for ESP based Devices

• hue2mqtt.js (⭐30) - Interface between the Philips Hue bridge and MQTT.

Misc / Firmwares for ESP based Devices

• mqtt2ble (⭐26) - A way to bridge MQTT topics to BLE Gatt characteristics.

Visualization, Dashboards / Firmwares for ESP based Devices

• Linear MQTT Dashboard (⭐54) - Easy, customizable control panel - MQTT-client.

Visualization, Dashboards / Firmwares for ESP based Devices

• HelloIoT (⭐108) - MQTT client and dashboard application.

Operating System / Firmwares for ESP based Devices

• psmqtt (⭐177) - Utility reporting system health and status via MQTT.

Lighting / Firmwares for ESP based Devices

• chromoflex2mqtt (⭐2) - Control Chromoflex USP3 RGB LED modules via MQTT.

Home Entertainment / Firmwares for ESP based Devices

• bravia2mqtt (⭐14) - Control your Sony Bravia TV with MQTT.

• mqtt2atlonamatrix (⭐0) - Control Atlona HDMI matrix switches with MQTT.

• yamaha-avr2mqtt (⭐10) - A simple adapter for connection Yamaha AVR to MQTT.

Misc / Firmwares for ESP based Devices

• dashbutton2mqtt (⭐16) - Publish Amazon Dash Button presses to MQTT.

• flowerpower2mqtt (⭐7) - Publish measurements from Parrot Flower Power plant sensors to MQTT.

• haiku2mqtt (⭐9) - A bridge between Haiku smart fans and MQTT.

• wlan-thermo-mqtt-addon - Addon for a popular DIY barbecue thermometer.

Visualization, Dashboards / Firmwares for ESP based Devices

• HOMR-REACT (⭐18) - A configurable MQTT Visualization.

Logging / Firmwares for ESP based Devices

• graylog-plugin-mqtt (⭐13) - MQTT Input Plugin for Graylog.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• hm2mqtt.js (⭐21) - Interface between EQ-3's Homematic line of smarthome devices and MQTT. Supports Homematic IP.

Lighting / Firmwares for ESP based Devices

• TRADFRI2MQTT (⭐83) - MQTT Bridge for IKEA TRÅDFRI Light Gateway.

Rust

• mqtt-rs (⭐184) - MQTT protocol library for Rust.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• aqara-mqtt (⭐88) - Aqara (Xiaomi) Gateway to MQTT bridge.

Visualization, Dashboards / Firmwares for ESP based Devices

• MQTT Dash - Android App: With the app you can create dashboards for your MQTT enabled IoT Smart Home devices and applications.

Home Entertainment / Firmwares for ESP based Devices

• harmony-api (⭐399) - A simple server allowing you to query/control multiple local Harmony Home Hubs over HTTP or MQTT.

Scripting

• Node-RED - A visual tool for wiring the Internet of Things.

Makers

• MySensors - Arduino NRF24L01 based sensor network with support for an MQTT gateway.

Smart Home Integration Software / Firmwares for ESP based Devices

• openHAB - Includes a MQTT binding (⭐3.4k).

Logging / Firmwares for ESP based Devices

• mqtthandler (⭐22) - A Python logging handler module for MQTT.

Home Entertainment / Firmwares for ESP based Devices

• chromecast-mqtt-connector (⭐45) - Control your Google Chromecast devices using MQTT.

Tools

• Wireshark-MQTT (⭐92) - MQTT dissector for Wireshark.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• Evohome2mqtt (⭐8) - MQTT Interface for the Honeywell Evohome system.

Tools

• mqtt-wall (⭐43) - Subscription only web-based client – like Twitter wall for MQTT.

Tools

• imqtt (⭐21) - Interactive MQTT packet manipulation shell based on IPython.

• Python MQTT Client Shell (⭐55) - Text console-based, interactive shell for exercising various tasks associated with MQTT client communications.

Operating System / Firmwares for ESP based Devices

• mqttpc (⭐9) - Control processes via MQTT. Ability to send signals via MQTT and to publish stdout/stderr or pipe MQTT payloads into stdin.

• mqttwatchdir (⭐41) - Recursively watch a directory for modifications and publish file content to an MQTT broker.

Brokers

• RabbitMQ - High performance messaging broker with MQTT Adapter.

JavaScript

• mqtt-elements (⭐27) - Polymer elements for MQTT.

PHP

• Mosquitto-PHP (⭐541) - A wrapper for the Mosquitto MQTT client library for PHP.

Scripting

• mqtt-scripts (⭐61) - Node.js based script runner.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• knx2mqtt (⭐49) - Interface between the KNX home automation standard and MQTT.

Smart Home Integration Software / Firmwares for ESP based Devices

• pimatic - MQTT plugin included.

Home Entertainment / Firmwares for ESP based Devices

• lgtv2mqtt (⭐107) - Interface between LG WebOS Smart TVs and MQTT.

• VLC MQTT Module - Control VLC via MQTT.

• xbmc2mqtt (⭐4) - A simple plugin for XBMC to listen for a particular topic on an MQTT broker, and display a popup message.

Visualization, Dashboards / Firmwares for ESP based Devices

• mqtt-svg-dash (⭐64) - Subscribe to MQTT, extract JSON from a message and make lights blink on an SVG page.

Brokers

• VerneMQ - Apache2 licensed distributed MQTT broker, developed in Erlang.

Tools

• mqtt-admin (⭐128) - Web based MQTT frontend. Direct Link.

Makers

• RFM69-MQTT-client (⭐81) - Arduino RFM69 based sensors and MQTT gateway.

Industry / Firmwares for ESP based Devices

• mqtt2opcua (⭐89) - Bi Directional MQTT to OPCUA Bridge.

Community Resources

• IRC channel #mqtt on the freenode network

Tools

• mqtt-benchmark (⭐122) - A benchmarking tool for MQTT Servers.

• mqtt-fuzz (⭐81) - A simple fuzzer for the MQTT protocol.

Ruby

• ruby-mqtt (⭐554) - Pure Ruby gem that implements the MQTT protocol.

Makers

• xbee2mqtt (⭐23) - XBee to MQTT gateway.

Telephony, PBX / Firmwares for ESP based Devices

• agi-mqtt (⭐34) - Interface between Asterisk and MQTT.

• fritz2mqtt (⭐8) - Connect FRITZ!Box to MQTT.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• mqtt-dss-bridge (⭐5) - MQTT digitalSTROM-Server Bridge.

Smart Home Integration Software / Firmwares for ESP based Devices

• ioBroker - Includes a MQTT adapter (⭐56).

Home Entertainment / Firmwares for ESP based Devices

• lirc2mqtt (⭐23) - Send and receive infrared via LIRC.

Messaging / Firmwares for ESP based Devices

• mqtt-irc-bot (⭐23) - A MQTT to IRC / IRC to MQTT bridge or bot.

Architecture, Convention / Firmwares for ESP based Devices

• mqtt-smarthome (⭐448) - Smart home automation with MQTT as the central message bus - Architectural proposal.

Scripting

• logic4mqtt (⭐17) - Java based Logic and scripting engine for use with MQTT. Uses Java's general scripting interface, so scripts can be written in a multitude of languages like JavaScript, Groovy etc.

Makers

• rpi2mqtt (⭐23) - Connect a RaspberryPis GPIOs and 1-Wire Temperature Sensors to MQTT.

Makers / ESP

• pubsubclient (⭐4k) - A client library for the Arduino Ethernet Shield that provides support for MQTT.

Operating System / Firmwares for ESP based Devices

• mqtt-os-status (⭐18) - Operating-system related data, published to an MQTT broker at fixed intervals.

Monitoring / Firmwares for ESP based Devices

• check-mqtt (⭐66) - A Nagios/Icinga plugin for checking connectivity to an MQTT broker.

Logging / Firmwares for ESP based Devices

• influx4mqtt (⭐38) - Subscribe to MQTT topics and insert into InfluxDB.

Smart Home Hardware Interfaces / Firmwares for ESP based Devices

• cul2mqtt (⭐9) - Interface between Busware CUL (868MHz RF-Devices like ELV FS20, HMS, EM, etc.) and MQTT.

• eno2mqtt (⭐10) - Interface between an Enocean USB300 (TCM310) adapter and MQTT.

Home Entertainment / Firmwares for ESP based Devices

• airtunes2mqtt (⭐52) - MQTT controlled Multi-Room Audio with Airplay/Airtunes Devices.

• onkyo2mqtt (⭐37) - Interface between Onkyo AVR's EISCP network remote protocol and MQTT. Uses the onkyo-eiscp library.

Messaging / Firmwares for ESP based Devices

• twitter-to-mqtt (⭐16) - A python daemon that uses the Twitter Streaming API to access tweets and republishes them to an MQTT topic.

Visualization, Dashboards / Firmwares for ESP based Devices

• mqtt-panel (⭐439) - A web interface for MQTT.