Comparison of wireless communication modules

Comparison of wireless communication modules

The role of wireless communication modules Comparison of commonly used wireless communication modules

　　 The wireless communication module enables all kinds of Internet of Things terminal devices to have the ability to transmit information on the Internet, and is the information portal for all kinds of intelligent terminals to access the Internet of Things. At present, in the M2M scenario, more cellular communication modules (2G/3G/4G) are used. In the future, LPWAN modules (NB/IoT, LoRa) will be rapidly applied.

　　 The wireless communication module enables all kinds of terminal devices to have the ability to transmit information on the Internet, and is the information portal for all kinds of intelligent terminals to access the Internet of Things. It is the key link between the perception layer and the network layer of the Internet of Things. The device data generated by all the terminals of the Internet of Things perception layer needs to be aggregated to the network layer through the wireless communication module, and then the device can be remotely controlled through the cloud management platform, and the data is effectively analyzed. Improve management efficiency of various application scenarios. There is a one-to-one correspondence between the wireless communication module and the IoT terminal, which belongs to the underlying hardware link and is irreplaceable.

　　There are so many types of wireless communication modules on the market, how should we distinguish them? Different wireless communication technologies have been developed based on different application scenarios and user needs. Let’s take a look at the differences between several common wireless communication modules. .

　　Bluetooth

Bluetooth is a wireless communication module that we often come into contact with every day. It is a wireless technology standard that can realize short-distance data exchange between fixed terminal equipment, mobile terminal equipment and personal area network, using 2.4~2.485GHZ ISM UHF radio waves in the band. 

　　 The complexity of Bluetooth wireless technology is high; the device is connected to the Internet in 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-distance wireless communication technology.

　　Wi-Fi

　　Wi-Fi wireless technology is very attributed to everyone, and it is the most wireless communication technology we come into contact with every day. It is a wireless local area network technology created with the IEEE 802.11 standard. This technology converts all wired network signals into radio wave signals, and other terminal devices are connected to wifi through a wireless communication module to realize wireless network communication.

　　Wi-Fi technology coverage 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, the data security performance is poor. However, the invention of wifi is very in line with the needs of modern individuals and society, and its development prospects are very huge.

　　ZigBee

　　 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 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.

　　Traditional Digital Radio

　　Digital transmission station refers to a high-performance professional data transmission station realized with the help of DSP digital signal processing technology and software wireless point technology. Digital radio can be understood as a communication medium. Like optical fiber and microwave, it has a certain range of use. The transmission distance of the digital radio is very far, suitable for various complicated environments, 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.