A Guide to i2s WiFi Module

2021-10-01/ By Admin

i2s WiFi Module

I2s stands for Inter-IC Sound and it is the electronic SBI (serial-bus-interface) standard that we use to connect digital voice devices. Initially, Philips Semiconductor introduced this standard in 1986. This device helps us transfer PCD voice data between electronic devices and integrated circuits. The hardware interface of I2s includes a bit clock line, word clock line, and a multiplexing data line. Today, we will talk about the i2s WiFi module from different aspects to help you create a better understanding.

I2s WiFi Module Interface

As we mentioned in the beginning, the i2s WiFi module interface involves a bit clock, a world clock, and a multiplexing data line. The bit clock or SCK clock line is usually known as the ‘bit clock’. Every data bit corresponds to the digital audio, a pulsed SCLK. The SCLK frequency = sampling frequency x sampling bits x 2.

The word clock was previously recognized as WS (word selection). Commonly, it refers to FS (Frame Sync) or LRCLK. In this, 0 equals the left channel and 1 equals the right channel. The multiplexing data line was previously known as SD (Serial Data). Today, we also recognize it as SDOUT, SDIN, ADCDAT, DACDAT, and SDATA, etc.

Common i2s WiFi Modules

There are many i2s WiFi Modules available in the WiFi module industry. Here, we will go through the features, technical specifications, and applications of a few common WiFi modules.

1. SKYLAB SKW93A WiFi Module

This module comes with 802.11 ac/n/g/b/a compliance. It has a MIPS 1004Kc dual-core (580MHz) processor, 3-port switch, I2S, SD-XC, and USB 2.0. This module is an ideal choice for LTE cat4/5, 802.11ac, Access Control (AC), VPN, hotspot, and edge.

This i2s WiFi module is perfect for consumer devices that require a 3.3V external power supply. This WiFi module comes with a 2.4GHz MIMO 2x2 wireless LAN chip having internal LNA and PA.

It is compatible with 2.4GHz operations and supports 144Mbps for 20MHz and 300Mbps for the 40MHZ channel. This model is compatible with router mode, client mode, and AP mode.

Module Features

Take a look at the following key features of this WiFi module:

  • IEEE 802.11 ac/n/g/b/a Compliance
  • 3T3R Mode and PHY 733Mbps Data Rate Support
  • Up to 1024 Megabytes DDR2 Memory
  • Up to 256 Megabytes Flash Memory
  • One WAN Port and Two LAN Ports
  • SD Card Support
  • Security: WAPI, WPA2, WPA, AES, TKIP, WEP64/128
  • Dimensions: 36.4mm (length) x 30.5mm (width) x 14.8mm (height)
  • FCC/CE Compliance
  • RoHS Compliance
  • Support Router/Client/AP Mode

This module supports 2.0 USB slave devices for a USB camera, USB 4G/3G dongle, and USB disk. It also supports interfaces, such as GPIO, UART lite, PWM, I2S (192K/24bits), SDIO, and I2C.

Technical Specs

Take a look at the technical specifications of the SKW93A i2s WiFi module below:

  • Model: SKW93
  • Antenna Type: IPEX
  • Voltage: 3.3V
  • Work Mode: AP Client, Gateway, Bridge
  • Operating Temperature: -20 to 55C

The frequency range of this WiFi module is 2412-2484 MHz and 5180-5825MHz.

Application Areas

SKW93A WiFi module is suitable for a range of applications. Some of the most common applications include USB wireless camera, VPN, 802.11ac router, WiFi audio, 4G/3G WiFi router, 5GHz UART WiFi, home automation, industrial control, and more.

2. WG219

It is a low-power IoT UART WiFi module that has a low-power onboard application processor. It is s single-stream, a small form-factor module that supports Wi-Fi-UART-Ethernet data transmission. This WiFi module is an ideal choice for applications in the enterprise, home automation, smart grid, and home control applications.

i2s WiFi module

It also allows for quick app development of ultra-low-power devices. If you want to design apps with 802.11n/g/b communication protocols, you can opt for this WiFi module.

The external antenna, built-in antenna, and interface port help in enhancing all features of the module. The interface port has power pins, UART ports, and GPIO ports.

Module Features

Here are the main features of the GW19 i2s WiFi module:

  • 802.11 i/e/n/g/b
  • 802.11 n (2.4GHz)
  • App, Cloud Server, AT Set
  • 802.11 e
  • A-MSDU and A-MPDU Aggregation
  • Network Protocols: FTP/HTTP/UDP/TCP, IPv4
  • Defragmentation and Fragmentation
  • Auto Beacon Scanning/Monitoring
  • WiFi Protected Access: WPS, WPA2-Enterprise, WPA2, WPA
  • Security Features: TSN and Pre-Authentication
  • Soft AP and BSS Infrastructure Station Mode
  • WiFi Direct, P2P Discovery, Power Management, and Group Owner
  • Antenna Selection and Diversity
  • UMA Certified and Compliant
  • RoHS Compliance
  • FCC and CE Compliance

You should compare the above features with your project requirements to know whether or not is suitable for your application.

Technical Specs

Take a look at the following technical specifications of the WG219 WiFi module:

  • Model: WG219
  • Voltage: 3.3V
  • Antenna Type: IPEX Connector or PCB Antenna
  • Frequency Range: 2.412 to 2.484GHz
  • Dimensions: 25.5mm x 18.0mm x 3.2mm
  • Work Mode: Soft AP + Station, Station, Soft AP
  • Operating Temperature: -20 to 70C
  • Wireless Security: WEP64/128, AES, WAPI, TKIP, WPA2, WPA hardware encryption

The storage temperature of this module is between -40 to 125C and operating humidity is 10% to 90%.

Application Areas

Because of the features and technical specifications of WG219, this WiFi module is suitable for various applications. However, the most common applications include, IoT, network consumer appliances/devices, metering, smart lighting, mesh network, baby monitors, sensor network, and smart lights & plugs.

Moreover, this WiFi module is also a perfect choice for home automation, building automation, industry control, and smart home gateway. If you are looking for a WiFi module for one of such applications, you can choose WG219.

Final Thoughts

We have various WiFi modules available on the market that you can choose for different applications in your project. If you are looking for a perfect i2s WiFi module for your project, you can choose the one that we have discussed above in this article. When choosing a WiFi module, there are certain factors and elements that you need to keep in your mind.

You must go through the complete technical specifications and features of the available WiFi modules to identify the most suitable choice for your application. Remember that the selection of the WiFi module impacts the overall value of your project. Therefore, you must choose it carefully after making all necessary comparisons.

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