I. Application of wireless communication module
Wireless modules are widely used in vehicle monitoring, remote control, remote control, small wireless networks, wireless meter reading, access control systems, community call, industrial data acquisition systems, wireless labels, identification, non-contact RF smart cards, small wireless data terminals, security and fire prevention systems, wireless remote control systems, biological signal acquisition, hydrological and meteorological monitoring, robotics control, wireless 232 data communication, wireless 485/ 422 data communication, digital audio, digital image transmission and other fields.
Ultra-aberrant receiver module technical indicators Ultra-aberrant receiver module volume: 28x11x4.5mm Main technical indicators: 1. Communication mode: AM2, operating frequency: 315MHZ3, receiving sensitivity: -102DBM4, quiescent current: 0.1MA5, operating current: 2.5MA6, operating voltage: DC 2.1-5.5V7, output mode: TTL Level.
Second, the use of wireless communication module precautions
The use of wireless communication module T process, sound meter frequency stability, stable function, suitable for small size, low voltage, micro-power battery-powered module. The application of wireless communication module is very simple, only need to pay attention to the following three precautions:
1, the communication rate is reasonable
The maximum transmission rate of the data module is 9.6KBs, generally controlled at 2.5k too high a data rate will reduce the reception sensitivity, increase the BER, or even not work at all.
2, reasonable information code format
When working with microcontrollers and modules, the transmission protocol is usually customized. Regardless of the modulation method used, the information code format of the transmission is very important, which will directly affect the reliable sending and receiving of data.
Recommended scheme for code set format
Leading code Synchronization code Data frame, leading code length should be greater than 10ms, in order to avoid background noise, the receiving module received data first easy zero level interference and cause the received data error. So using CPU compiled code can add some disordered code before the data identification position to suppress zero level interference. Synchronization code is mainly used to distinguish the leading code and data. There are certain characteristics that enable the software to recognize the synchronization code and prepare to receive the data.
Data frames should not use non-zeroing codes, let alone long zeros and long ones. Use Manchester codes or POCSAG codes, etc.
3, microcontroller interference receiving module
Microcontroller analog 2262 is usually normal. However, when the microcontroller emulates 2272 decoding, it is usually found that the remote control distance is much shorter. This is because the multiplication of the clock frequency of the microcontroller will interfere with the receiver module. 51 series of microcontrollers electromagnetic interference is large, 2051 slightly smaller. PIC the series is relatively small, we need to take a number of anti-interference measures to reduce interference. For example, the microcontroller and the remote control receiver circuit respectively, using two 5-volt power supply, the receiver board alone to use a 78L05 microcontroller clock area away from the receiver module, reduce the operating frequency of the microcontroller, the middle of the shielding and so on.
When the receiver module and 51 series microcontroller interface, it is best to do an isolation circuit, you can better inhibit the microcontroller on the receiver module of electromagnetic interference. The receiver module usually outputs high level pulses instead of DC levels, so a multimeter cannot be used. In the debugging process, you can use a light-emitting diode in series 3K to monitor the output status of the module.
Third, the development prospects of wireless communication module
In the information age, we can find that communication technology is particularly important, which has a great impact on people's work and life. At the same time, more and more fields are inseparable from the support of communication technology, especially in the field of Internet of Things. Communication technology is divided into wired communication technology and wireless communication technology, in which wireless communication technology can make information transmission and communication between people more convenient. China's wireless communication technology is rapidly developing (FS) development, in the country and the support of science and technology, phase communication in the future will also maintain a very good development trend, promote the application of all fields, become the future of people's work and life is inseparable from the part that can break the barriers of time and space, to achieve the high-speed and efficient exchange of information on a global scale, so that the communication technology to play a greater role.
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 R & D 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 application solutions, and is committed to creating long-term customer satisfaction. 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 scheduling, 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, our company is closely involved in the development and production of wireless communication products, such as RTK differential modules, 4G communication modules and high-precision antennas.
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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