Dafengkou of the Internet of things, the wireless module that can realize the connection between mobile phone and intelligent terminal equipment and data transmission, naturally attracts wide attention. With the continuous rise and development of wireless network, the application field of WiFi module is quite extensive, from indoor to outdoor, and the space has also been greatly extended. At present, skw77, Skylab’s high-power WiFi image transmission module, has been successfully applied to non-interference communication Man machine video transmission. The key point of Skylab is to understand several common communication interfaces of WiFi module products for novice engineers and new designers who have just come into contact with WiFi module.

The common communication interfaces of WiFi module include: USB, SDIO, SPI (slave), UART, rgmii, RMII. Skylab WiFi modules can be roughly divided into four categories according to the interface classification, namely USB interface WiFi module, Ethernet interface, serial WiFi module UART interface, Bluetooth two in one WiFi. The commonly used communication interface and WiFi module models are as follows:

USB:WG209,WG211

The first mock exam SDIO:WG213 (WiFi+BluetoothV4.1 two in one module)

UART:WU105,WU106

GMII:SKW78

MII:SKW71,SKW72,SKW73,SKW75,SKW92A/B,SKW95,SKW77,SKW79

  

When consulting the specific hardware design and related WiFi modules, the following aspects should be considered clearly:

Module chip manufacturers: mainstream or Realtek / MTK / Atheros / Broadcom and some domestic RDA / BK; basic hot models of chips are as follows: USB interface: mt7601, mt7610u series; SDIO interface: qca9377; AP module series are as follows: ar9331, mt7620n, mt7628n, mt7688a, mt7621a, mt7603e, mt7612e; Internet of things IOT:MT7687 , mt7681, etc;

Communication interface: at present, several commonly used communication interfaces of WiFi module products are introduced in Skylab. At present, Skylab’s main WiFi modules are divided into four categories: USB interface WiFi module, Ethernet interface, serial WiFi module UART interface and Bluetooth two in one WiFi module;

Power supply: most of them use 3.3V direct power supply, and a few WiFi modules support 3.3v/5.0v and 3.3v/1.5v;

Antenna processing form: it can have a built-in PCB antenna, or connect the antenna extension line through i-pex connector, and then let the antenna outside;

Specification and size: according to the specific design requirements, Skylab has sorted out an article about the selection of wireless module, and the WiFi module selection table has detailed module size for your reference;

Connection form with motherboard: SMT can be used directly, or plug-in connection can be made through pin arrangement (this kind of assembly and maintenance is convenient);

The software debugging should be combined with the specific scheme control. After all, the WiFi part is only a wireless transceiver. Many users are easily confused when consulting. The above is Skylab’s WiFi module selection points from the common communication interface of WiFi module. The specific WiFi module selection needs to be determined according to the WiFi module requirements of the design product.

From the current market application of WiFi module, in addition to the Internet of things, which is a broad emerging market, WiFi module also has penetration in some traditional network application markets, such as some vehicle, set-top box, and even some remote control fields. Basically, the parts that can use the network want to try wireless. Based on the expanding market application of WiFi module, Skylab Jun thinks that it is necessary for relevant designers to master the relevant entry points of WiFi module consultation and selection, so that in addition to completing WiFi selection faster, they can also obtain more professional WiFi module technical support and relevant WiFi module application solutions from Skylab.

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