2026 MQTT IoT Practice: ESP32 Data Collection + Node-RED Visualization
Build a complete MQTT IoT monitoring system from scratch: Mosquitto server deployment and configuration, ESP32 sensor data collection and reporting, Node-RED real-time dashboard visualization. Includes complete source code, wiring diagrams, and common troubleshooting solutions, covering QoS settings, auto-reconnection and other practical techniques, suitable for IoT beginners and developers.