MQTT has become the de facto standard for IoT sensor data delivery to the cloud. This article explains the MQTT publish/subscribe architecture, QoS levels, Will and Retained messages, and shares practical engineering experience on system architecture design, TLS security hardening, and message payload design for sensor MQTT integration.

Modbus and BACnet are the two cornerstones of building automation communication. This article comprehensively covers protocol principles, data models, comparative analysis, and engineering best practices for Modbus RTU/TCP modes and the BACnet object model, helping you build robust building communication architectures.

With a market flooded by multi-in-one environmental sensor products, how do you select the solution that truly matches your project? This article provides a practical selection guide covering integration tiers (parameter/algorithm/system level), six core selection dimensions, typical building application scenarios, and deployment practices.

Current sensors are the "nerve endings" of building energy monitoring systems. This article comprehensively analyzes current transformers, Hall effect sensors, shunt resistors, and Rogowski coils from four dimensions: working principles, type selection, building applications, and deployment practices.

Ultrasonic sensors, with their non-contact measurement, fast response, and moderate cost advantages, are widely used in building distance measurement, liquid level monitoring, and obstacle detection scenarios. This article comprehensively analyzes the key applications of ultrasonic sensors in building intelligence, covering working principles, technical parameters, selection criteria, and practical deployment.

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Vibration sensors are the core sensing elements of industrial equipment condition monitoring, known as the "stethoscope" of rotating machinery. This article provides a comprehensive overview of vibration sensors' key roles in building electromechanical equipment monitoring, covering technical principles, type selection, installation deployment, and data analysis.

In IoT sensor deployment, LoRaWAN and NB-IoT are two mainstream wide-area low-power communication technologies. This article provides an in-depth comparison across coverage range, power consumption, cost, and application scenarios to help you choose the most suitable communication solution.

In-depth comparison of Zigbee, WiFi and Bluetooth for IoT applications, providing selection guidance for smart building and energy monitoring projects.