4G/5GDTU/router, ZigBee module, WIF, Bluetooth wireless transmission characteristics and applications
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1. 4G/5GDTU/router, it is a wireless unlimited distance remote transmission method, it is based on the network of the three major operators for data transmission, supports public network transmission and VPN transmission, the characteristics are unlimited distance, as long as there is an operator signal can be used, the amount of data transmitted is large, the cost is relatively high. Mainly used in electricity, water conservancy, environmental protection, heating, automatic control.
2. ZigBee module. ZigBee, also known as "purple bee", is a local area network protocol based on the IEEE802.15.4 standard, with a frequency band of 2.4GHz. It has the characteristics of short distance, simple application, self-organizing communication, low power consumption, high security, and low cost. Since it supports automatic networking, it requires at least one coordinator and one router. It is mainly suitable for automatic control, remote control, various smart homes, etc.
3. WIFI. WIFI technology is also a short-range wireless transmission technology. The standards adopted are IEEE802.11a and IEEE802.11b. The frequency band used is generally 2.4GHz. The transmission distance is generally about 100m. The networking method is relatively simple. A wireless network composed of AP and wireless network card is sufficient. At present, in addition to using WIFI in many hotels, restaurants, libraries, office buildings and homes, you only need to carry a WIFI-supported terminal to access the Internet. It is also used in smart home control, such as TV, air conditioner, lamps, curtains, etc.
4. Bluetooth. Bluetooth is also a wireless technology standard with a band of about 2.4GHz and a communication distance of generally no more than 100m. Bluetooth is mainly used in portable devices, such as various instruments, smart homes, sports measurement, automotive electronics, leisure toys, mobile phone peripherals, data acquisition systems, etc.
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