Practical guides on MQTT, managed brokers and connected products from the ConnectMQ team.
You do not need an enterprise budget to run a data-driven plant. This roadmap shows small and mid-sized manufacturers how to start with a few sensors, a free managed MQTT broker and open-source tools, then grow in steps.
Build a Flask app that subscribes to MQTT topics, caches the latest value per device, serves it through REST endpoints and publishes commands from a POST route, with the deployment pitfalls that break most first attempts.
A structured, defensive approach to MQTT penetration testing: how to scope a test of your own broker, what to check at each layer and how to turn findings into hardening work.
An MQTT historian subscribes to your plant topics and stores every value as time series. This guide compares InfluxDB, TimescaleDB and commercial historians and shows working Telegraf and Python setups.
The Asset Administration Shell is the Industry 4.0 standard for describing industrial assets as digital twins. Learn its structure, the three AAS types, and a practical pattern for feeding live submodel values from MQTT.
Sparkplug B gives industrial MQTT a strict session and payload model, while a Unified Namespace gives your plant data a single, readable home. Here is how they fit together, with topic design tips and live examples.
Drive a WS2812B addressable LED strip from an ESP32 with JSON MQTT commands for color, brightness and effects, and publish retained state so every dashboard stays in sync.
Use spindle power and vibration published over MQTT to build a per-tool wear index, compare every cut with the fresh-tool baseline and change tools based on condition instead of a fixed part count.
A serverless MQTT broker gives you a ready endpoint on a shared, multi-tenant cluster with no servers to manage. Learn how it works, its limits, and when it is the right fit.
Build a .NET console publisher and subscriber with MQTTnet, MQTT 5 properties and TLS on port 8883, then add reconnect logic and move the same code to a private ConnectMQ broker.
MQTT and Kafka are not competitors so much as neighbors. This guide explains what each one is built for, compares them side by side and shows how to feed Kafka from an MQTT broker with an external consumer service.
MQTT and AMQP are both brokered messaging protocols, but they solve different problems. This comparison covers routing, delivery guarantees, footprint and typical architectures so you can pick with confidence.
A practical guide for teachers and students: use a public broker for live demos, give each team an isolated free broker for graded work, and avoid the classic classroom pitfalls.
Models deployed on edge devices degrade quietly. This guide shows how to publish inference metrics over MQTT, measure drift centrally and raise alerts when a field model needs attention.
Turn an AI-Thinker ESP32-CAM into an MQTT camera that publishes JPEG snapshots on demand or on a timer, stays inside broker message limits and saves every frame with a small Python subscriber.
Too many alarms are as dangerous as too few. Learn why alarm floods happen, how ISA-18.2 structures alarm management, how to prioritize and how to publish clean alarm events over MQTT.
An MQTT broker is the hub that routes every message between IoT devices and apps. Learn publish/subscribe, topics and wildcards, sessions, QoS, retained messages and last will, then try it hands-on in minutes.
Learn how connected machines, an MQTT data backbone and a clear topic namespace turn a traditional plant into a data-driven one, with a step-by-step roadmap and working Python examples.
MQTT 5 split the old clean session flag into Clean Start and Session Expiry Interval. Here is how the two combine, which values to choose and how to verify them on a live broker.
How to sample, compress, timestamp and store industrial time series data flowing over MQTT, with deadband code, a Telegraf config and a storage decision table.
Build a browser-based conveyor digital twin whose rollers and parcels move at the real belt speed from MQTT, highlights jams, counts throughput and sends start, stop and reset commands back to the line.
Leaks run around the clock, even when the plant is idle. Learn how to quantify them with flow and pressure sensors, MQTT telemetry and an off-shift baseline that turns a hidden cost into a tracked number.
Build a live Streamlit dashboard fed by a background paho-mqtt subscriber connected to broker.connectmq.com, with a thread-safe buffer, auto-refreshing charts and a simulator to feed it.
Turn a Raspberry Pi and any HDMI screen into a wall-mounted dashboard. A single HTML page subscribes to MQTT over secure WebSocket, and Chromium starts full screen in kiosk mode on every boot.
Wire a DHT22 to a Raspberry Pi, read it with Python, and publish validated temperature and humidity JSON over MQTT with retries, median filtering and error counters that keep bad readings out of your dashboards.
Node-RED context lets flows remember things between messages. This explainer covers the three scopes, memory versus file storage, multiple stores, async access and a practical pattern for keeping the latest MQTT value per device.
Ready-to-copy MQTT topic trees for smart home, fleet tracking, factory and energy monitoring projects, each with the wildcard subscriptions it is designed for and the mistakes to avoid.
A hands-on guide to MQTT topic browsers: generate a realistic topic tree, explore it in the ConnectMQ live topic explorer, and use what you see to fix naming, retained-message and payload problems.
A practical comparison of emqtt-bench, MQTTX Bench and Locust for MQTT load testing, with real commands, a latency and loss probe in Python, the metrics worth collecting and the rules for testing responsibly against a private broker.
A step-by-step presence pattern for MQTT fleets: retained birth messages, a retained Last Will, graceful shutdown messages and a monitor that tracks every device's state in real time.
Create an account, get your broker credentials and connect your first device — no servers to install, patch or scale.
