First, 2.4GHz wireless module
The 2.4GHz frequency range is 2.4~2.5GHz, which is a universally used wireless frequency. 2.4GHz is a networking protocol developed based on high-speed transmission rate. It has weak diffractive power, low receiving sensitivity, and relatively long distance. Short, but strong penetrating power, easy to set up the network, and simple to develop. It is widely used in indoor applications such as wireless construction and wireless broadband routers.
Second, 433HMz wireless module
The 433HMz wireless module uses high-frequency RF technology, which consists of a single IC RF front-end and a single-chip microcomputer to transmit signals at high speed. The frequency range is: 433.05~434.7HMz. 433HMz has higher receiving sensitivity and good diffractiveness. Under the same parameters, the transmission distance of 433 is farther than other frequencies, but the penetration ability of 433 is poor, and the networking is very difficult. 433HMz is the frequency of domestic license-free ISM development. It does not need to be authorized by local radio management, so it can be widely used in the market.
Third, 470MHz wireless module
According to the "China Radio Frequency Division", the main purpose of 470-510MHZ is to be used as a broadcasting service. The secondary services include fixed, mobile, radio transmission, etc. 470MHz is not an unlicensed frequency, so the 470MHz frequency is applied in the market. The range is not particularly large. The 470HMz band is generally used in the field of wireless walkie-talkies in the market.
Fourth, 868MHz wireless module, 915MHz wireless module
The domestically prescribed ISM frequency is 433MHz, 868MHz and 915MHz are ISMs regulated by countries such as Europe and the United States, so the 868 and 915HMz are not particularly widely used in China. 868MHz was introduced in China in 2008 to increase the use of micropower radios, while 915 was used by GSM.
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