With the development of society, the term “smart home” has become full of our lives, marking the advent of the Internet of Things era. The Internet of Things (IoT, Internet of things), that is, the “Internet where everything is connected”, actually uses information and communication technology to connect everything to the Internet. Today we will talk about three common communication technologies in the Internet of Things: WiFi and Bluetooth What are the differences between , ZigBee.
WiFi:
First of all, WiFi is the most commonly used one for us. Whenever we go to a new place, connecting our mobile phones to WiFi is now the first need of most people. This shows how well-known WiFi is. So what is WiFi?
WiFi refers to wireless Internet access, which can be simply understood as wireless Internet access. At that time, almost all smartphones, tablets, and laptops supported Wi-Fi Internet access. It is the most widely used wireless network transmission technology today. In fact, it is to convert wired network signals into wireless signals, and use wireless routers to be received by relevant computers, mobile phones, tablets, etc. that support its technology to complete wireless data exchange. If your mobile phone has Wi-Fi function, you can surf the Internet without going through China Unicom’s network when there is a Wi-Fi wireless signal, thus saving traffic charges.
WiFi equipment is easy to use, has fast transmission speed, and low latency. It can transmit large files such as videos and is suitable for high real-time situations. However, the number of router connections will be limited, and WiFi has high power consumption and cannot be powered by batteries, so it is widely used. Used in refrigerators, power strips, TVs and other equipment in smart homes.
Bluetooth:
Bluetooth is a small-range wireless connection technology that supports short-distance communication between devices. It can realize convenient, fast, flexible, safe, low-cost, and low-power consumption data communication and voice communication between devices. Bluetooth is used to establish connections between different devices and uses short-wavelength communication. The ISM frequency band is 2.4-2.485GHz.
Bluetooth is also a veteran active in the mobile phone family. It was used for mobile phone file transfer in the early days. Compared with WiFi, the power consumption of Bluetooth can be said to be greatly reduced, especially BLE Bluetooth. One battery can be used normally for a long time, but it cannot Like WiFi, which can transmit large files at high speed, it cannot directly communicate with the Internet. Therefore, it is widely used in wearable devices such as sports bracelets.
ZigBee:
The term ZigBee may seem unfamiliar. ZigBee technology is a short-range, low-complexity, low-power, low-speed, low-cost two-way wireless communication technology. Most are used for short-range wireless connections. The bottom layer is the media access layer and physical layer that adopts the IEEE 802.15.4 standard.
ZigBee cannot communicate directly with mobile phones and can only be controlled through a ZigBee controller, so it is not very convenient to use. However, the low power consumption and number of nodes of ZigBee devices are incomparable to the other two. In terms of meter reading, smart light control, etc. Very widely used.
The above are the three commonly used communication technologies in the Internet of Things: WiFi, Bluetooth, and ZigBee concepts and differences.
Keywords: full network module