#mqtt

HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support

MQTT CLI is a useful command line interface for connecting various MQTT clients supporting MQTT 5.0 and 3.1.1

A command-line tool and Python library and Pytest plugin for automated testing of RESTful APIs, with a simple, concise and flexible YAML-based syntax

Full featured Z-Wave Control Panel UI and MQTT gateway. Built using Nodejs, and Vue/Vuetify

Apache Artemis

A drop-in replacement for boto3.Session named RefreshableSession. It automatically refreshes temporary AWS credentials, caches clients, and natively supports MFA providers. It also supports automatic temporary AWS security credential refresh for STS, IOT Core, and custom credential callables.

Open-source telemetry dashboard. Supports UART, BLE, MQTT, Modbus, CAN Bus and more.

Async Python client for Victron Venus OS (GX) that maps MQTT topics to typed devices and metrics - read sensors and control writable settings.

High-performance scalable message broker for modern event-driven applications

Crossbar.io - WAMP application router

Control your KNX intallation via Node-Red! A bunch of KNX nodes, with integrated Philips HUE control and ETS group address importer.

ESP32 mqtt component

Communication infrastructure for the AI era — one binary, one broker, one storage layer, any protocol

Smart irrigation for urban trees: LoRaWAN soil sensors reveal which trees actually need water, then the planner turns that into optimized watering routes and fleet schedules for municipal green-space teams.

Integrate your Shelly devices into ioBroker via MQTT or CoIoT

C99 implementation of the MQTT 3.1.1 specification.

CSharp SDK for CloudEvents

Spectacular C# MQTT and Sparkplug Clients for .NET

MQTT protocol support for k6