Wireless communication module
Wireless communication modules are widely used in vehicle monitoring, remote control, telemetry, small wireless networks, wireless meter reading, access control systems, community paging, industrial data acquisition systems, wireless tags, identification, non-contact RF smart cards, small wireless data terminals, security Fire protection system, wireless remote control system, biological signal acquisition, hydrometeorological monitoring, robot control, wireless 232 data communication, wireless 485/422 data communication, digital audio, digital image transmission, and other fields.
Types of wireless communication modules
Wireless data transmission module. The manufacturer of this module has made a single-chip microcomputer and has written the wireless communication part of the program. It can directly send and receive data through the serial port. It is simple to use and relatively expensive.
The wireless transceiver module is generally controlled by a single-chip microcomputer to wirelessly send and receive data, usually in FSK and GFSK modulation modes.
ASK superheterodyne module, mainly used for simple remote control and data transmission.
The common wireless communication module
Bluetooth is a wireless communication module that we often come into contact with every day. This technology was invented by the then telecommunications giant Ericsson in 1994. It is a wireless technology standard that can realize fixed terminal equipment, mobile terminal equipment, and personal area networks. For short-distance data exchange, use UHF radio waves in the 2.4~2.485GHZ ISM band.
The complexity of Bluetooth wireless technology is relatively high; the device networking speed is fast, only 10 seconds; the integration and reliability are very high; the transmission rate is generally 1Mbps; the cost is low, and the installation is relatively simple. It is a suitable short-range wireless communication technology.
Wi-Fi wireless technology is very attributed to everyone, and it is the most wireless communication technology we come into contact with daily. It is a wireless LAN technology created with the IEEE802.11 standard. This technology converts all wired network signals into radio wave signals, and other terminal devices connect to wifi through a wireless communication module to realize wireless network communication.
The coverage of Wi-Fi technology is generally within 100 meters, the technology is more complicated, the transmission rate can reach 54Mbps, the working frequency band is 2.4GHZ, and the transmission power is less than 100mw. Compared with Bluetooth wireless communication, data security performance is poor. However, the invention of wifi is in line with modern personal and social needs, and its development prospects are very huge.
ZigBee wireless communication technology is a low-power local area network protocol based on the IEEE802.15.4 standard. It was formally established in August 2001. At the beginning of its establishment, due to the hasty release of the version, there were certain errors, and the subsequent development continued to improve.
ZigBee wireless communication technology is similar to Bluetooth wireless communication technology, both are short-range wireless communication technologies, but Bluetooth wireless communication technology has many shortcomings, such as high power consumption, high complexity, short communication distance, etc., which is only suitable for family and personal use. The development of ZigBee technology is to meet the needs of industrial automation. It has a simple layout, anti-interference, reliable transmission, convenient use, and low cost. The communication distance ranges from 10 meters in Bluetooth to hundreds of meters in open spaces and about 50 meters indoors.
4. Traditional digital radio
Digital radio station refers to a high-performance professional data transmission radio station with the help of DSP digital signal processing technology and software wireless point technology. Digital radio can be understood as a communication medium, which has a certain range of use like optical fiber and microwave. The transmission distance of the digital radio station is very long, suitable for various complicated environments, and the transmission rate is 19.2Kbps, but the terminal equipment is more expensive, the use cost is also high, and the installation is more complicated.