People desire to live more conveniently with the improvement of technology. Therefore, the Internet of Things (IoT) flourishes in recent years. IoT emphasis on communication between things or things with people, the scope of IoT's usage is quite large, for example, it can be applied to the smart grid, smart buildings or even smart city. We can classify IoT for a variety of technology, which includes MQTT (Message Queuing Telemetry Transport), ZigBee and RFID (Radio Frequency IDentification), etc. Among of above, MQTT is a publish/subscribe, extremely simple and lightweight messaging protocol, designed for constrained devices and low-bandwidth, high-latency or unreliable networks. The design principles are to minimize network bandwidth and device resource requirements also attempting to ensure reliability and some degree of assurance of delivery. MQTT has been widely implemented across a variety of industries since 1999. In this study, MQTT will be introduced about applying in the check alive monitoring of several verified Sub-Systems, Local-Gateway System, and Intelligent Community Management Platform.
Message Queuing Tlelmetry Transport (MQTT) Internet of Things Check Alive