Serial port and Ethernet conversion device based on IoT (Internet of Things) MQTT protocols

Abstract

The invention relates to a serial port and Ethernet conversion device based on the IoT MQTT protocols. The conversion device comprises a voltage converting circuit, a single-chip microcomputer control circuit, an SWD debugging interface circuit, a W5500 hardware protocol stack circuit, a network transformer and RJ45 interface circuit and an RS232 serial port communication circuit. The serial port and Ethernet conversion device with the IoT MQTT protocols can be connected to an MQTT server in the Ethernet and carry out reliable long-distance point-to-point communication, supports transparent data transmission in the TCP_Server, TCP_Client, UDP and UDP_Server modes, and has the advantages of small size, low cost and low power consumption.

Description

technical field [0001] The invention belongs to the field of communication technology, and relates to a serial port and Ethernet conversion device based on the MQTT Internet of Things protocol, which is mainly used for connecting RS232 interfaces of embedded processors, sensors, programmable logic controllers, and data storage devices in Internet of Things terminals. The device is connected to the Internet. Background technique [0002] As an emerging communication technology in the 21st century, Internet of Things technology has developed rapidly around the world in recent years. IT industry giants such as IBM and Microsoft have also launched their own Internet of Things technology achievements. With the advent of the Internet of Things era, our country and government have fully realized the importance of the Internet of Things technology revolution. China's Internet industry has developed rapidly in recent years, and it has already established the necessary foundation fo...

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Problems solved by technology

[0004] Chinese patent CN102387054A proposes a serial-to-Ethernet control device based on STM32. The device uses a software Ethernet protocol stack. Although this software protocol stack can reduce the cost of the device, it greatly reduces the stability of communication, and uses STM32 The serial-to-Ethernet device only supports server mode, not client mode, and the device cannot log in to the remote server for data transmission

This set of devices cannot support the UDP protocol and integrate the MQTT Internet of Things protocol, and cannot realize non-connection-oriented high-speed data transmission and large-scale long-distance point-to-point reliable communication. Ethernet conversion device

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