Ogemray Technology WF7681KMX User Manual

S

Specification

UART WiFi Module

GWF-KM22

(2.4GHz 802.11 b/g/n)

Ver: 1.2

2014-10-17

Contents

1. Introduction............................................................................................................................................................... 1

1.1 Profile................................................................................................................................................................1

1.2 Features............................................................................................................................................................. 1

1.3 Block diagram...................................................................................................................................................2

1.4 Outline...............................................................................................................................................................3

1.5 Specification..................................................................................................................................................... 4

1.6 Pinout configuration......................................................................................................................................... 6

1.7 Characteristics................................................................................................................................................... 7

2. Reminds to hardware design................................................................................................................................. 8

2.1 Application........................................................................................................................................................ 8

2.2 GPIO Descriptions............................................................................................................................................ 8

2.2.1 LED Display......................................................................................................................................9

2.3 UART interface................................................................................................................................................. 9

2.4 Power supply.....................................................................................................................................................9

2.6 Dimensions................................................................................................................................................... 13

2.7 Clear place to use the module.................................................................................................................. 13

3.Software descriptions.............................................................................................................................................14

3.1 AT command.................................................................................................................................................14

4.Certificate and Approval.........................................................................................................................................15

5.Disclaimer.................................................................................................................................................................15

Figures and tables

Table 1-1 General Specification.................................................................................................................................. 3

Table 1-2 Pin configuration......................................................................................................................................... 5

Table 1-3 Absolute Max Rating................................................................................................................................... 6

Table 1-4 DC Characteristics.......................................................................................................................................6

Table 2-1 UART interface............................................................................................................................................7

Table 2-2 Power input.................................................................................................................................................. 8

Table 5-1 Certificates and Approval.......................................................................................................................... 15

Fig. 1-1 Block diagram-An onboard antenna used......................................................................................................2

Fig. 1-2 Outline reference picture................................................................................................................................3

Fig. 1-3 Pin definition overview..................................................................................................................................5

Fig. 2-1 To use external MCU ................................................................................................................................... 6

Fig. 2 -2 Reference design of GPIO pins......................................................................................................................7

Fig. 2-3 Reference design for external LED connection............................................................................................. 7

Fig. 2-4 UART reference connection diagram............................................................................................................ 9

Fig. 2-5 Ref pic with onboard antenna........................................................................................................................ 9

Fig. 2-6 Dimensions...................................................................................................................................................10

Fig. 2-7 Clear space needed..................................................................................................................................... 11

1. Introduction

1.1 Profile

The GWF-KM22 module operates in 2.4GHz ISM frequency band with low power consumption; it

applies a highly integrated MAC/BBP in the MT7681 chipset, support IEEE的802.11b/g/n standards with

1T1R technology.

This module supports TCP/IP， UDP protocol ，its low cost and low power consumption, easy using

characteristics make the wireless connection become easy and reliable.

The single side components mounted module provide 1 UART interface and 4 GPIO ports. The optional

on-board or external antenna easy the downstream RF hardware technology requirement. A set of future

provided serial AT commands can simplify software design, thus a normal, simple, cheap MCU can be

used to control the WiFi module easily.

The module includes a number of TCP/IP-based connectivity protocols enabling a low-cost,

low-complexity system to contain full-featured internet connectivity and reliable information exchange.

This module is mainly used in a multitude of smart home appliances and consumer electronics such as

remote control, thermostats, power socket, WIFI audio transmission, LED control, wireless sensor, etc

and other applications.

1.2 Features

 Supports 2.4GHz, 802.11b/g/n Client and AP mode

 Internal MCU development SDK supported.

 Smart WiFi configuration supported.

 Provide 1 UART and 4 GPIO ports.

 Support WEP,WPA2 encryption mode

 Selection Client and AP mode

 RF ON/OFF control, Sleep mode power management.

 Optional onboard antenna .

1

1.3 Block diagram

Fig. 1- 1 Block diagram--The onboard antenna used

2

1.4 Outline

1.5 Specification

Table1 1–1 General Specification

Protocol and interface

WiFi Protocol IEEE 802.11b/g/n

Data interface 1 UART, Max data rate:115200bps

I/O ports 4 GPIO

Fig. 1- 2 Outline reference picture

3