IoT gateways will also become an important link for connectivity. As a gateway device, in addition to being responsible for the protocol conversion between different types of perception networks, the IoT gateway can integrate the information collected by different things and transmit it to the next level, so that the information can be Transmission between the various parts. The IoT gateway can re···

The Modbus protocol includes ASCII, RTU, TCP, etc., and does not specify the physical layer. This protocol defines the message structure that the controller can recognize and use, regardless of what kind of network they communicate through. The standard Modicon controller uses RS232C to implement serial Modbus.

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 rap···

After the 4G network card receives the 4G signal, the 4G wireless router converts the signal into a WLAN signal that can be received by the notebook wirelessly. At the same time, it can also be connected to the computer through the LAN port of the 4G router with a network cable, so that it can be realized by using the router function Multi-machine sharing 4G Internet access.

There are many ways to maintain industrial-grade 4G routers. The key also needs to be determined according to the actual use situation. Each user does not need to deliberately maintain it. They only need to choose the target Simple maintenance methods are sufficient, and timely adjustment and maintenance techniques are designed to prolong the service life of the router.

2.4G and 5G are different protocols used by wireless networks. 2.4G refers to 2412MHZ-2472MHZ in the country, which can be divided into 13 full channels, while 11 channels are regulated in the United States. 5G is 5725MHZ~5825MHZ in this country, 4 channels.

When the distance to the router is the same, the 5G signal is weaker than the 2.4G signal, which is determined by the physical characteristics of electromagnetic waves: the longer the wavelength, the less attenuation, and it is easier to bypass obstacles and continue to spread. The 5G signal has a high frequency and short wavelength, while the 2.4G signal has a low frequency and a long wavelength.···

Features of 5G Industrial Router: Good anti-interference. Because the signal energy of the 5G frequency band is large, but the coverage is weak, that is, the coverage of a large room, the impact of penetrating the wall is great, which causes the interference between the mutual routers to be small, and the use of The frequency band is different from the existing 2.4G router signal, so the signal is···

Spread Spectrum Communication, that is, spread spectrum communication technology (Spread Spectrum Communication), its basic characteristic is that the bandwidth of the signal used to transmit information is much larger than the bandwidth of the information itself.

M2M (Machine to Machine) is a machine-to-machine communication technology, in a broad sense, M2M (Man to Machine), the Internet of Things is to connect objects (including machines) together. Obviously, M2M is an important part of the Internet of Things to connect objects. It is impossible to connect objects to form a huge Internet of Things without M2M technology. M2M technology and products are i···