PCB News - Common types of wireless communication modules in the Internet of things

With the rapid development of Internet of things technology, Internet of things terminal equipment is also widely used in various scenarios. Different application scenarios have different market demands. At present, there are a variety of wireless communication modules in the market, which makes many users unable to correctly distinguish various types of wireless modules. Today, I will explain several common types of wireless communication modules, The technologies and differences they use have been.

1. Bluetooth wireless communication modules

Bluetooth is a wireless communication module. It is a wireless technology standard, which can realize short-distance data exchange between fixed terminal equipment, mobile terminal equipment and personal LAN. It uses 2.4 ~ 2.485ghzuhf radio wave ism in the frequency band.

Bluetooth wireless technology has high complexity and fast networking speed, which takes only 10 seconds; High integration and reliability; The transmission rate is generally 1Mbps; Low cost and relatively simple installation. This is a short-range wireless communication technology.

2.Wi-Fi wireless communication modules

Wi Fi wireless technology has spread all over every aspect of our life. It is a common wireless communication technology we contact every day, which has brought great convenience to our life. It is a wireless LAN technology based on IEEE802.11 standard. This technology converts all wired network signals into radio wave signals, and other terminal devices are connected to WiFi through wireless communication module to realize wireless network communication.

The coverage of Wi Fi technology is generally within 100m, the technology is relatively complex, 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 relatively poor. However, the invention of WiFi is very in line with the needs of modern people and society, and the development prospect is very broad.

3.ZigBee wireless communication modules

ZigBee wireless communication technology is a low-power LAN protocol based on IEEE802.15.4 standard. It was officially established in August 2001. At the beginning of its establishment, there were some errors due to the hasty release of this version, which has been improved since then.

ZigBee wireless communication technology is similar to Bluetooth wireless communication technology. Both are short-range wireless communication technologies, but Bluetooth wireless communication technology has the disadvantages of high power consumption, high complexity and short communication distance. Its application range is limited and is widely used in families and individuals. ZigBee technology is developed to meet the needs of industrial automation. It has the characteristics of simple layout, anti-interference, reliable transmission, convenient use and low cost. The communication distance was extended to 10 meters. From the opening distance to several hundred meters, it can reach about 50 meters in the indoor scene.

4. Digital radio wireless communication modules

Data transmission radio station is a high-performance data radio station realized by using 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 also has certain applications. Digital radio has a long transmission distance and is suitable for various complex environments. The transmission rate is 19.2kbps, but the terminal equipment is expensive, the use cost is high, and the installation is complex.

Common types of wireless communication modules in the Internet of things

Common types of wireless communication modules in the Internet of things

Types and differences of wireless communication modules

According to different classification standards, we can also divide the common wireless modules in the market into three categories

1. ASK Superheterodyne module is mainly used for simple remote control and data transmission;

2. Wireless transceiver module is mainly used to control wireless transceiver data through single chip microcomputer. Generally, FSK and GFSK modulation methods are adopted;

3. The wireless data transmission module mainly sends and receives data directly through the serial port, which is convenient to use. If divided by the operating frequency, there are usually 230MHz, 315MHz, 433MHz, 2.4GHz, etc. in the market. Like helium K, smart home also uses WiFi module to control household appliances.

In the IOT application scenario, large particles (with an annual demand of more than 10 million) have been formed in the market, mainly in the fields of smart meters, mobile payments, smart vehicles, smart grid and so on. The growth of these fields has driven the substantial growth of the wireless communication module market.