What Are The Interfaces of WiFi Module?

时间： 2023-08-11 来源：SKYLAB News

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What is a WiFi Module interface? Simply put the device needs a communication interface to exchange data with external devices. It mainly includes a USB interface, UART interface, SDIO interface, I²S interface, I²C interface, WAN port, LAN port, SPI interface, RJ-45 interface, and so on.

USB interface WiFi module

USB interface is the most common kind of wifi module interface. It is a universal serial bus, a serial bus standard that connects the MCU inside the wifi module with external devices.

Slave mode USB interface wifi module:skw17ae, wg209, wg217, wg233

Master mode USB interface wifi module:SKW77, SKW78, SKW92A, SKW92B, SKW93A, SKW95, SKW97, SKW99, SKW100, SKW103 and so on.

UART interface WIFI module

UART interface is a universal asynchronous serial interface. According to the standard baud rate to complete bidirectional communication, the transmission speed is slower.UART bus is an asynchronous serial interface. Therefore, generally more complex than the structure of the first two synchronous serial interfaces. Generally consists of a baud rate generator, UART receiver, and UART transmitter. The hardware consists of two wires, one for sending and one for receiving.

The wifi module adopts the UART interface, which supports serial transparent data transmission mode. It has multi-mode security capability. the UART wifi module has a built-in TCP/IP protocol stack and IEEE802.11 protocol stack. It can realize the conversion between the user serial port to the wireless network.

IoT UART wifi module: WG219, WG229, WG231, LCS6260;

IOT UART wifi Bluetooth combo module: WG222, LCS2028, WG235, WG236, WG238.

SDIO interface WIFI module

SDIO interface is the expansion interface of the SD card type. the wifi module is equipped with an SDIO interface, which can be connected to an SD card, and also can be connected to devices. Adapters, barcode readers, TV receivers, digital cameras, and other devices that use the SDIO standard interface.

SDIO protocol is evolved and upgraded from the protocol of SD cards. In many places, the read/write protocol of the SD card is retained. At the same time, the SDIO protocol adds CMD52 and CMD53 commands on top of the SD card protocol. This also makes an important difference between the SDIO and SD card specifications with the addition of the low-speed standard.

SDIO interface wifi module: wifi Bluetooth 2-in-1 module WG225.

Ethernet interface wifi module(RJ-45 interface wifi module）

Ethernet is a computer LAN technology. Ethernet is the most commonly used LAN technology, and the RJ-45 interface is the most common network equipment interface. This interface is available in 10Base-T Ethernet, 100Base-TX Ethernet, and 1000Base-TX Ethernet.

100Gb Ethernet port wifi module: SKW77, SKW92A, SKW92B, SKW93A, SKW95, SKW97, SKW99, SKW100, SKW103;

Gigabit Ethernet port wifi module: SKW78.

I²C interface WIFI module

I²C interface is a two-wire serial bus developed by Philips. It is used to connect microcontrollers, sensors, and their peripheral devices. The I²C bus uses two wires to transfer information between the bus and the device.

It performs bi-directional data transfer between the microcontroller and the external device. I²C is OD output. Most of the I²C is 2-wire and is generally used to transfer control signals. In addition, the I²C interface uses a one-to-many approach, sending data in units of bytes.

I²S Interface

The I²S interface is a bus standard developed by Philips. Most I²S interfaces are 3-wire. I²S is mainly used to transmit audio signals. STB, DVD, and MP3 are common I²S standards. It specifies both the hardware interface specification and the format of digital audio data.

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