Wireless communication module function introduction
In the era of Internet of things, if you want to communicate between things, you need to rely on the wireless communication module to help them send and receive signals, so that a variety of Internet of things terminal equipment with network information transmission capabilities.
1、Communication function: support GPRS dual-channel transmission of SMS data; support multi-center data communication.
2、Adoption function: collect serial port instrument, collector and other serial port device data PLC, etc.
3、Remote management function: support remote parameter setting and program upgrade.
Fourth, the characteristics of wireless communication module
In the era of the Internet of things, if the Internet of things want to communicate, they need to rely on wireless communication modules to help them send and receive signals, so that a variety of Internet of things terminal equipment with network information transmission capabilities. The device data generated by the IoT perception layer terminals need to be pooled to the network layer through the wireless communication module to remotely monitor and manage the network devices through the management platform to improve management efficiency.
1、Strong anti-interference ability: Strong anti-interference ability can meet different wireless communication environments, especially in the interference environment;
2、High bandwidth: realizing high-bandwidth access and high-bandwidth transmission, supporting the transmission rate requirements of each service;
3, wide coverage: through extensive wireless access and distributed multi-hop transmission to achieve wide coverage of the network;
4、Strong mobility: strong mobility to meet the needs of mobile deployment;
5, can be automatically repaired: to improve the network anti-destruction self-repair capabilities;
6, rapid deployment: to achieve node plug and play, network deployment without human intervention;
7, transmission security: through customized encryption and decryption algorithms and authentication authentication mechanism to ensure transmission security;
V. Working principle of wireless communication module
Most of the modules involved in the Internet of Things are wireless communication modules, referred to as wireless modules. The principle of wireless communication module is to send or receive electromagnetic wave signals and convert them into information that we can understand. The role of the wireless communication module is to connect objects to objects so that various IoT terminal devices can realize the information transmission capability and so that various smart devices have the information interface of IoT.
The principle of wireless communication is to transmit information such as sound, text, data, images, etc. through electromagnetic waves (without cables) in free space. Information transmission is mainly through ground wave transmission, sky wave transmission and linear transmission.
Since the IoT communication system works in both VHF and UHF frequency bands (30-3000MHz), electromagnetic waves propagate in the lower atmosphere in a direct manner. Since the lower atmosphere is a homogeneous medium, it produces refraction and absorption, and may encounter various obstacles (R), diffraction (D), bypassing and scattering (S) on the transmission path.
When electromagnetic waves encounter objects with much longer wavelengths than the wavelength, reflection occurs at smooth interfaces, such as the surface of the earth, buildings, and walls.
2. Bypassing of electromagnetic waves occurs when the propagation path between the receiver and the transmitter is blocked by a sharp edge. As a result of the bypass, the electromagnetic wave can cross the obstacle to the receiving antenna. Even if there is no line of sight path between the transceiver antenna, the receiving antenna can still receive the electromagnetic signal.
3, when the wave through the medium there is less than the wavelength of the object, the number of obstructions per unit volume is very large, scattering will occur. Scattered waves arise from rough surfaces, small objects, or other irregularities. In practical communication systems, blades, street signs, and lampposts can cause scattering.
Since electromagnetic waves are continuous analog signals, digital data in wireless communications needs to be modulated into an analog signal, commonly used methods are ASK (amplitude shift keying) speed (FS)K and PSK (phase shift keying).
Note: There are two signals in a communication system: analog and digital. An analog signal is a constantly changing electromagnetic wave, while a digital signal is a sequence of voltage pulses. Telephone communication belongs to the analog data (sound waves) transmitted through the analog signal; home broadband dial-up Internet belongs to the digital data transmitted through the analog signal (modulated by the cat), the analog signal can also be converted to digital signals (modulated by the cat); computer local area sharing belongs to the digital data transmitted through the digital signal.
Ltd. specializes in high-precision GNSS modules and wireless communication products, technology development and application promotion service providers, relying on the wireless communication technology in the field of research and development and promotion of experience, JUNODA set up a team with a wealth of experience in hardware and software development technology, aimed at domestic and foreign OEM / ODM customers and system integrators to provide high-quality, high-performance wireless modules and applications We aim to provide high-quality, high-performance wireless modules and application programs to OEM/ODM customers and system integrators at home and abroad, and create long-term value for customers!
The company mainly provides integrated antenna module, dual-frequency high-precision module, single-frequency high-precision module, thousand-seeking high-precision module, Zhongke micro-positioning module, U-BLOX positioning module, SICOM communication module, inertial navigation DR module, UWM GNSS module, RTK differential module, 4G communication module and high-precision antenna, etc., the products are sold well in Beijing, Shanghai, Shenzhen, Guangdong, Jiangsu, Zhejiang, Sichuan, Hunan and other parts of the country. Our GNSS modules are widely used in many application fields, such as drones, vehicle security monitoring and dispatching, automatic bus stop announcement, DVR, car DVD navigation, GPS electronic dog, synchronized timing, high-altitude balloon monitoring, engineering machinery, industrial automation, etc. In the field of wireless communication products, the company is closely involved in the field of wireless communication, such as RTK differential module, 4G communication module and high-precision antenna.
In the field of wireless communication products, the company follows the latest development of international communication technology, introduces and acts as an agent for wireless communication modules that meet the market demand, and the products have a comprehensive layout from 2G, 3G, 4G, and are widely used in financial electronic payment, vehicle remote control, remote advertising information, repeater monitoring, mobile Internet terminals, smart home, remote medical care, network testing, enterprise information management, anti-theft alarm, Remote video transmission, intelligent meter reading, mobile computing, network navigation, voice phone, wireless gateway and other fields. Focus areas include video surveillance, network optimization, routers, POS and other M2M industry applications.
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