Development of the IoT module SCADA using MQTT Protocol and AES

The efficiency and safety of the Internet of Things (IoT) have always been the focus of the development of IoT devices. Because the chips used in IoT devices generally have poor computing power, they cannot transmit data quickly and in large amounts, and use more complex security algorithms. Therefore, this thesis is to develop an IoT module with STM32 chip as the main controller. This module uses MQ Telemetry Transport (MQTT)[1] Protocol and AES encryption technology, and this IoT module can be operated directly with a browser. MQTT is a communication protocol for the IoT, which was developed by IBM and Eurotech, and officially became an OASIS international standard in 2014. The purpose of development is to send and receive processing messages under narrow bandwidth and low energy consumption conditions. To ensure the security of IoT communications, we use AES encryption technology. Through this design, the communication of the entire IoT module is more efficient and safe. In addition, whether in household or industrial applications, it is very complicated to establish a monitoring system. Therefore, we build a SCADA system based on MQTT technology and through simple drag-and-drop operations. In the future, we will continue to improve related software and hardware so that this IoT module can be used in different fields. The connection and monitoring of the entire IoT can be applied in more fields.