After the smart phone, more and more intelligent products are poured into our work and life. After the traditional equipment is intelligent, the hardware has the ability to connect and realize the loading of the Internet service. Users only need to use WiFi or Bluetooth in the smart phone. Control of the device can be achieved. This article SKYLAB Jun takes the wireless printer application based on serial port WiFi module as an example to introduce the specific application of WiFi module in intelligent hardware.
There are two types of wireless printing:
First, the wireless network card of the PC is directly connected to the WiFi hotspot of the printer;
The second is that the wireless network card of the PC is connected to the wireless router; the first one is to realize the direct printing of the printer to the printer without using the wireless router without using the Internet; the second one can realize the printer of all the computers under the same wireless router. Wireless sharing.
If you are a mobile phone, you need to download the mobile app, which has a QR code to scan and download the app. Connect to the printer WiFi hotspot with WiFi first, and open the APP to select the file to print.
Serial WiFi module
The working mode of the serial port wifi module has two working modes: AP and STA. The AP is a hot spot, that is, it can radiate a wireless wifi network as the AP mode itself. The STA is the site mode, the client mode, that is, like our computer. Like a router, he is the equivalent of a computer. The WiFi module in the wireless printer is the AP mode, the wifi module works in the AP mode, and the intelligent terminal (mobile phone, tablet) directly accesses the network provided by the wifi module, and realizes wireless control in the same hotspot network.
AP WiFi module SKW71/SKW72
The SKW71 is a WiFi module that complies with the 802.11 n / b / g wireless network standard and is designed with a USB interface to provide enhanced WiFi performance.
The AR9331 chip used in the SKW71 has a new architectural feature: an integrated CPU and a memory capable of running more WiFi functions on the chip. The integrated CPU is capable of offloading overhead from the host device in wireless processing, thereby enabling the consumer electronics device to fully support the WiFi function without changing the original host processor.
SKW72 WiFi is a module that complies with the 802.11b/g/n wireless standard. Its low power consumption and high AP integration make it widely used in consumer electronics, and it is powered by 3.3V!
The main chip of SKW72 is AR9331, and the module integrates dual PA and LNA! Under the 802.11n standard, 20Hz, its rate reaches 72Mbps; under the 802.11b/g standard, 40Hz, its rate reaches 150Mbps! This module supports AP mode, client mode and routing mode!
Applicable scene:
It is widely used in a variety of gateways, set-top boxes, game consoles, printers, IP cameras, etc. These host processors can not be used for WiFi functions at first. More WiFi module application selection can directly access SKYLAB official website or Tiangong measurement and control. Ali shop.
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