IEC104, Modbus and MQTT are three different types of communication protocols. Their main differences are as follows:


IEC104: It is a communication protocol used to monitor substations in power systems. It supports two-way communication, has high reliability and security, and can communicate between different hardware platforms. The IEC104 protocol usually uses TCP/IP networks.


Modbus: It is the most widely used communication protocol in the industrial field and is used for data exchange between devices. It supports multiple transmission methods (serial port, Ethernet, etc.), can realize device interconnection between different manufacturers, and has the advantages of being simple to understand and easy to implement.


MQTT: is a lightweight publish/subscribe messaging protocol mainly used for communication between IoT devices. It adopts the "publisher-subscriber" model for data transmission, which has the advantages of low power consumption, high efficiency, and can ensure data security and integrity.


In terms of application scenarios:


IEC104 is mainly used in the power industry, such as power grid dispatching, substation control and other fields.


Modbus is widely used in the field of industrial automation, such as communication between PLC controllers, sensors, measuring instruments and other equipment.


MQTT is mainly used in the field of Internet of Things, such as communication between devices in smart homes, smart cities and other scenarios.


Thanks to the customers' cooperations and engineers' hard work, the G6502 IoT EDGE Gateway has achieved to gather datas from slave devices via Modbus RTU and send to scada system via IEC 60870-5-104. And it has rich interfaces: 4-LAN, 1-TF card slot, 2-DI, 2-DO (Relay), 2ADC, 2-RS232, 3-RS485, WIFI(802.11b/g/n), GPS(Option), and rich protocols such as MQTT, Modbus RTU/TCP, Modbus to Json, TCP/UDP, to collect and transfer the data from diverse sensors and controllers to the server, also remotely control the equipment. It has been widely used in Smart Energy, Agriculture, Traffic, Finance and other IoT projects. For more informations about G6502 IoT EDGE Gateway, please refers to: 

IEC104, Modbus and MQTT

Created on:2023-11-17