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IOT UART wifi module


Industrial Grade Microchip SPI/SDIO WiFi Module WG228

WG228 is Skylab based on Microchip original technical support R & D and production of low-power IEEE 802.11 b / g / n industrial-grade Internet of Things (IoT) WiFi module, designed for low-power distribution applications.

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WLAN Standard IEEE 802.11b/g/n
Host Interface SPI, SDIO
Dimension(L×W×H) 21.7 x 14.7 x 2.1  mm

The WG228 wifi module is a low-power consumption IEEE 802.11 b/g/n IoT (Internet of Things) module, which is specifically optimized for low power IoT applications. This module features small form factor (21.7mm x14.7mm x 2.1mm) while fully integrating Power Amplifier (PA), Low Noise Amplifier (LNA), Transmit/Receive(T/R), switch, power management, and PCB antenna. With advanced security, it is interoperable with various vendors using IEEE 802.11b/g/n Access Points in wireless LAN. The module provides Serial Peripheral Interface (SPI) and Secure Digital Input Output (SDIO) to interface with the host controller.


◆Compliant with IEEE 802.11 b/g/n 20 MHz (1x1) solution

◆ Supports Single spatial stream in 2.4 GHz ISM band

◆Integrated Power Amplifier (PA) and Transmit/Receive (T/R) switch

◆ Superior sensitivity and range through advanced PHY signal processing

◆Advanced equalization and channel estimation

◆Advanced carrier and timing synchronization

◆Wi-Fi Direct® and Soft-AP support

◆ Supports IEEE 802.11 WEP, WPA, WPA2 and WPA2-Enterprise security

◆ Superior Medium Access Control (MAC) throughput through hardware accelerated twolevel A- MSDU/A-MPDU frame aggregation and block acknowledgement

◆On-chip memory management engine to reduce the host load

◆ SPI and SDIO host interfaces

◆ Operating temperature ranges from -40°C to +85°C

◆Input/Output operating voltage of 1.8V to 3.6V

• Power-save modes:
– <1µA Power-Down mode typical at 3.3V I/O
– 380µA Doze mode with chip settings preserved (used for beacon monitoring)
– On-chip low power Sleep oscillator
– Fast host wake-up from Doze mode by a pin or the host I/O transaction

◆Wi-Fi Alliance® certified for connectivity and optimizations

Feature Description
Model WG228
WLAN Standard IEEE 802.11b/g/n, Wi-Fi compliant
Host Interface SPI, SDIO
Dimension(L×W×H) 21.7 x 14.7 x 2.1  mm
Frequency range 2.412 GHz ~ 2.472 GHz (2.4 GHz ISM band)
Number of channels 11 for North America, 13 for Europe
Modulation 802.11b: DQPSK, DBPSK, CCK   802.11g/n: OFDM/64-QAM,16-QAM, QPSK, BPSK
Data rate 802.11b: 1, 2, 5.5, 11 Mbps        802.11g: 6, 9, 12, 18, 24, 36, 48, 54 Mbps
Data rate(20 MHz ,short GI,400ns) 802.11n: 7.2, 14.4, 21.7, 28.9, 43.3, 57.8, 65,72.2Mbps
Operating temperature -40°C to 85°C
Storage temperature -40°C to 125°C
Humidity Operating humidity 10% to 95% non-condensing
Storage humidity 5% to 95% non-condensing
Block Diagram

The following figure provides a basic overview of the WG228 module.

Block Diagram

1. who are we?
We are based in Guangdong, China, start from 2006,sell to North America(30.00%),Eastern Europe(15.00%),Western Europe(15.00%),Northern Europe(14.00%),Oceania(5.00%),South Asia(5.00%),Domestic Market(5.00%),South America(4.00%),Southeast Asia(3.00%),Africa(00.00%),Mid East(00.00%),Central America(00.00%),Southern Europe(00.00%).
2. how can we guarantee quality?
Always a pre-production sample before mass production; Always final Inspection before shipment;