Practical guides on MQTT, managed brokers and connected products from the ConnectMQ team.
Home Assistant and Node-RED both automate devices, but they think differently. This comparison covers automation style, MQTT integration, debugging and maintenance, and shows a clean way to run both against one shared MQTT broker.
How water and wastewater utilities use MQTT to bring pump stations, reservoirs and lift stations into one telemetry layer, with topic design, report by exception, threshold alerts and a runnable station simulator.
MQTT is an open standard, yet IoT projects still get locked in. The cause is rarely the protocol; it is reserved topics, proprietary auth, vendor SDKs and logic that lives inside one platform. Here is how to stay portable.
Learn how MQTT TLS really works, what clients must verify, and how to configure Python, Node.js, ESP32 and mosquitto clients for an encrypted connection on port 8883.
The MQTT publish subscribe model lets devices and apps exchange data without knowing about each other. Learn the three kinds of decoupling and try them live with two clients on broker.connectmq.com.
A practical comparison of running an MQTT broker on Kubernetes versus using a managed service, with a working manifest, the operational pitfalls of long-lived connections, and a cost-driver breakdown.
Use open-source CIP libraries on an edge gateway to read ControlLogix and CompactLogix tags and generic EtherNet/IP device attributes, then publish them as clean MQTT messages.
Wire a DHT22 to an ESP32, read temperature and humidity reliably, publish JSON to broker.connectmq.com and view the live readings in the ConnectMQ topic explorer.
How digital twins combine live condition data streamed over MQTT with physics and data-driven models to forecast failures, with a working Python example and rollout checklist.
Learn which Tasmota builds include TLS, how SetOption103 and SetOption132 work, and how to connect an ESP32 Tasmota device to an encrypted MQTT broker on port 8883.
OEE, MTBF, first pass yield, energy per unit and more: a practical list of 15 smart factory KPIs with formulas, the raw machine data each requires and how to compute them live from MQTT events.
A hands-on tutorial for building a private certificate authority with OpenSSL, securing a lab Mosquitto broker on port 8883 and connecting clients, plus the operational costs that make public certificates easier in production.
Public test brokers are perfect for learning and demos; private brokers are where real devices belong. Learn the practical differences and how to move from one to the other without rewriting your clients.
OPC UA and MQTT are often framed as rivals, but they solve different problems. Compare information modeling, communication patterns, security and cloud connectivity, and learn the architecture most plants end up with.
WebSocket and MQTT are often compared, but one is a transport and the other a messaging protocol. Learn what raw WebSocket apps must build themselves and how to run MQTT over secure WebSocket in the browser.
MQTT 5 topic aliases replace long topic names with a two-byte number after the first publish. Learn how the negotiation works, how many bytes you actually save and how to use aliases safely from MQTT.js.
Build a Python service that subscribes to MQTT alarm and telemetry topics, applies thresholds with hysteresis and cooldowns, and sends rate-limited SMTP emails, then see how it complements ConnectMQ's built-in alert rules.
QoS 1 means at least once, and sometimes that means twice. Learn why MQTT duplicate messages happen, why the DUP flag alone cannot save you, and how to build idempotent consumers that handle them safely.
A practical guide to digital twin technology: what a twin really is, the main types, a reference architecture, and how to feed a live 3D model with real-time MQTT data.
A practical use case for AI HVAC optimization: which building data to collect over MQTT, how to learn a zone's thermal response, how to compute optimal start times and setpoints, and how to apply recommendations safely.
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