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Home > Tech > Wireless module Categories and Frequencies

Wireless module Categories and Frequencies

There are more and more wireless modules on the market, but they can be broadly divided into three categories:

1. ASK superheterodyne module: a simple remote control and data transmission;

2. Wireless transceiver module: mainly uses a single chip microcomputer to control the wireless module transceiver data, the commonly used modulation mode is FSK, GFSK;

3. Wireless data transmission module, mainly using serial port tools to receive and send data, easy for customers to use.

Now the wireless modules on the market are widely used, with frequencies of 230MHz, 315MHz, 433MHz, 490MHz, 868MHz, 915MHz, 2.4GHz and so on.

Comparison of characteristics between 433M and 2.4G wireless modules. First of all, the 433M frequency range is 433.05~434.79MHz, while the 2.4G frequency range is 2.4~2.5GHz. Both are licensed in the ISM(Industrial, Scientific and Medical) open band in China. There is no need to apply for a license from the local radio regulatory authority to use these bands. So these two bands are widely used.

433MHz RXB8 wireless module, using high frequency radio frequency technology, so it is also called RF433 radio frequency small module. It is composed of single IC RF front end and ATMEL AVR single chip microcomputer, which can transmit data signal at high speed. It can package, detect and correct the data transmitted by wireless technology. Components are industrial standard, stable and reliable operation, small size and easy to install. Applicable to security alarm, wireless automatic meter reading, home and industrial automation, remote control, wireless digital transmission and other wide range of fields.

433M wireless module has high reception sensitivity and good diffraction performance. 433MHz products are used in master-slave mode communication systems. The master-slave topology is actually a smart home, which has the advantages of simple network structure, easy layout and short power on time. 433MHz, 470MHz has now been widely used in the intelligent meter reading industry.

The 2.4GHz application point is a networking protocol developed based on its high transmission rate.

Choose different frequency modules according to different networking methods. If the network is easy, the requirements are relatively simple, a host multiple slave, low cost requirements, the use of the environment is more complex, you can use 433MHz RXB8 wireless module. Relatively speaking, if the network topology is more complex, many functions, strong robustness of the network, low power requirements, simple development, can use 2.4GHz with networking function of the product.