Three major wireless communications commonly used in the Internet of Things industry

        We know that in recent years with the rapid development of wireless communication technology, many wireless communication modules have emerged in the market. Internet of things and wireless is an inseparable whole. Especially for decentralized terminal equipment data collection such as grid-based environmental monitoring, sky network system, intelligent monitoring, smart city and so on need to access wireless devices. Today our company will talk about several commonly used integrated modules.

RTU

Remote Terminal Unit (RTU), as a special computer measurement and control unit, is mainly used in places where the communication distance is long and the environment of industrial sites is harsh. It is often used as a data acquisition unit. The commonly used data communication protocol is Modbus, commonly used interface RS485, such as to a certain extent, to avoid manual to the scene to read the data mode, for the development of the Internet of things to add bricks and mortar.

DTU

DTU (Data Transfer unit), the main role of the module is to convert the serial data such as serial data into the public network IP or private network APN domain name data, to achieve data transmission with the outside world, the most current applications are water quality monitoring, atmospheric monitoring and other fields. Why use this wireless terminal? Because most of the current equipment interface for RS232 or RS485, at this time if you want to transmit data to a remote platform, then you need the intervention of this conversion module. Because of the need for networking so, need to correspond to the Internet of Things card.

LoRa

For the emergence of LoRa we must be very puzzled, with DTU and RTU why need LoRa? In fact, the answer is very simple, when using RTU or DTU, we need the corresponding Internet of Things card, such as 4G or 2G traffic card of the three major carriers, if the terminal equipment is in the basement, or the mountainous areas where the signal is not good, LoRa can be useful at this time. LoRa is a kind of wireless RF transmitter and receiver device, using the main frequency band 433/470/868/915MHz, etc. It can collect the data information of all the interrupted sub-devices in this range. It is characterized by long range, low power consumption, and multiple nodes. However, at present, the only LoRa-related chip maker is Semetch, and Semetch's LoRa is also a LoRa communication solution realized by acquiring Cycleo through upgrading.

 
     All in all, we believe that no matter RTU, DTU or LoRa is an indispensable module for IoT communication, and each has its own characteristics. The practical application will become more and more mature, so that the Internet of Everything can be realized as soon as possible. We also hope that future wireless communication modules will have better performance in terms of packet loss, power consumption, compatibility and cost. At the end of the article, we share the common growth and progress with all of you.