WiFi is also called the 802.11b standard. The biggest advantage is the fast transmission speed, which can reach 11Mbps. Besides, the effective distance of WIFI is also very long. It is also compatible with existing 802.11DSSS devices. The IEEE 802.11B wireless network specification is a derivative of the IEEE802.11 network specification. The maximum bandwidth is 11Mbps. In the case of weak signal or interference, the bandwidth can be adjusted to 5.5Mbps, 2Mbps and 1Mbps, and the automatic bandwidth adjustment effectively ensures the stability and reliability of the network. Its main characteristics are high speed, high reliability, communication distance of 305 meters in the open area, 76 meters to 122 meters in the closed area, easy to integrate with the existing wired Ethernet, low network cost. Wi-fi, short for WirelessFidelity, is the same short-range wireless technology used in offices and homes as WirelessFidelity and bluetooth. The technology uses a bandwidth of about 2.4G...