The current three mainstream wireless communication modules for IoT.

In recent years, with the rapid development of wireless communication technology, many wireless communication modules have appeared in the market. IoT and wirel...

Sep 10,2021 | Editha

In recent years, with the rapid development of wireless communication technology, many wireless communication modules have appeared in the market. IoT and wireless are an inseparable whole. Especially for decentralized terminal equipment data collection, such as grid-based environmental monitoring, sky network system, intelligent monitoring, smart city, etc. need wireless device access. Today I will talk about several more commonly used integration modules.

RTU

RemoteTerminalUnit (RTU) is a special computer measurement and control equipment, mainly used in areas with long communication distances and harsh industrial site environments. It is usually used as a data acquisition unit.iot wifi module modbus is the common data communication protocol, commonly used RS485 interface. For example, to a certain extent, to avoid the manual way to read data on site, adding bricks to the development of the Internet of Things.

DTU

DTU (DataTransferunit), the main role of the module is to convert serial port data into public network IP data or private network APN domain data to achieve data transmission with the outside world, the most current applications are water quality monitoring, atmospheric monitoring and other fields. Why use such a wireless terminal? Since the interface of most devices is RS232 or RS485 at present, if you want to transmit data on a remote platform, you need to intervene in this conversion module. Because of the need for networking, the corresponding IoT card is required.

LoRa

About the emergence of LoRa everyone must be curious, why DTU and RTU both need LoRa?In fact, the answer is simple, when using RTU or DTU, both need the corresponding IoT card, such as 4G or 2G traffic card of three major carriers, if the terminal equipment in the basement, or mountainous areas where the signal is not good. LoRa is a wireless RF transmitter-receiver device, mainly using 433/470/868/915MHz and other frequency bands, capable of collecting data information from all interrupted sub devices in this range. Its characteristics are remote, low power consumption, and multi-node. However, at present, the only LoRa-related chip manufacturer is Semetch, and Semetch's LoRa is also the LoRa communication solution for the acquisition of Cycleo, which has been upgraded.

In short, I think both RTU, DTU and LoRa are indispensable modules in IoT communication, each with its own characteristics. The application in practice will become more and more mature, so that all things interconnected soon. The author also hopes that future wireless communication modules will have better performance in terms of packet loss rate, power consumption, compatibility, cost, etc. Finally, if you have any good suggestions are welcome to leave a message inside the comments section, I will actively answer, we grow and progress together.

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RemoteTerminalUnit DataTransferunit