Where is the mobile phone wifi module_Mobile phone wifi module location diagram

January 25, 2023

Wifi module summary

The Wi-Fi module, also known as serial Wi-Fi module, belongs to the Internet of Things (IoT) transport layer. Its function is to convert the serial port or TTL level to an embedded module that conforms to the Wi-Fi wireless network communication standard. The built-in wireless network protocol IEEE802.11b.gn Protocol stack and TCP/IP stack. The traditional hardware device embedded in the Wi-Fi module can directly use Wi-Fi to connect to the Internet, and is an important part of implementing the Internet of Things application such as wireless smart home and M2M.

WiFi module classification

1. Universal Wi-Fi modules, such as USB or SDIO interface modules on mobile phones, laptops, and tablet computers. Wi-Fi protocol stacks and drivers run on Android, Windows, and IOS systems. They require very powerful CPUs. Complete the application;

2, the router program Wi-Fi module, typically a home router, protocol and driver is to use a chip with a strong Flash and Ram resources plus Linux operating system;

3, embedded Wi-Fi module, 32-bit microcontroller, built-in Wi-Fi driver and protocol, the interface for the general MCU interface such as UART. Suitable for all types of smart home or smart hardware items.

Now many manufacturers have tried to add Wi-Fi modules to televisions, air conditioners and other devices to build wireless home smart systems. The control of the APP and the docking of Internet giants such as Alibaba Cloud, Jingdong Cloud, and Baidu Cloud allow home appliance manufacturers to quickly and easily realize network intelligence of their own products and achieve interconnection and interoperability with more other electrical appliances.

Where is the mobile phone wifi module_Mobile phone wifi module location diagram

How wifi module works 1. Active serial device networking

Active-type serial device networking refers to the way that the device actively initiates connections and interacts with the back-end server (uploading or downloading). A typical active device, such as a wireless POS machine, starts to connect to a background server and upload transaction data after each swiping transaction is completed. The topology of PUSH serial device networking is shown in the right figure. Among them, the background server acts as a TCP server end, and the device accesses the network through a wireless AP/router and acts as a TCP Client.

2. Passive serial device networking

Passive serial device networking means that all devices in the system are always in a passive waiting connection state. Only the background server initiates the connection with the device and requests or transmits data. In typical applications, such as certain wireless sensor networks, each sensor terminal is always collecting data in real time, but the collected data is not uploaded immediately, but is temporarily stored in the device.

The background server periodically connects with the device periodically and requests uploading or downloading data.

At this point, the background server actually acts as the TCP Client side, and the device serves as the main feature of the TCP Server side 2.4GHz, IEEE802.11b/g internal PCB antenna, and an optional external antenna supports the AP-based network/peer network Ad- Hoc (IBSS))/Virtual AP mode, IPHONE/IPAD/Android devices can also directly connect without 802.11i encryption without using AP/router: WEP-64/128, TKIP (WPA-PSK) and AES (WPA2-PSK) MCUs Built-in TCP/IP protocol stack 3-way UART serial interface (1 channel supports DMA mode, full-featured serial port, baud rate up to 921.6Kbps) SPI interface, I2S/PCM interface DigitalVideo port up to 24 GPIO ports (some GPIOs will Will be multiplexed with the above interface) Full-featured TCP/IP protocol stack, TCP/IP transmission bandwidth up to 10Mbps or more Supports three WiFi power-saving modes with timed auto-wakeup function

Mobile phone WiFi module location diagram