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SEEED WIKI - Shield WiFi 802.11b 

Introduction This Wifi Shield utilizes a RN171 wifi module to provide your Arduino/Seeeduino with serial

Ethernet's function. It only takes two pins to hook your device up to 802.11b/g wireless networks with

this shield. It features an independent antenna which can cover a wider range and transmit stronger

signals. With supports for common TCP, UDP and FTP communication protocols, this Wifi Shield can

meet needs of most wireless network projects, like smart home networks, robot controls or personal

weather stations,etc. We prepared an easy and convenient command set for this shield so that you

can use neat and concise code to run the function.

SKU：

WLS06201P

Features 

   Arduino, Seeeduino, Arduino Mega and Seeeduino Mega compatible

  Host Data Rate up to 1 Mbps for UART, 2 Mbps over SPI slave

  UART serial port of RN171 on the Shield can be connected to Arduino by jumpers

  SPI pin of RN171 is just breakout

  With two Grove connectors, making it easy to connect I2C and digital IO Grove modules to

 Arduino

  Secure WiFi authentication WEP-128, WPA-PSK (TKIP), WPA2-PSK (AES)

  Built-in networking applications: DHCP client, DNS client, ARP, ICMP ping, FTP, TELNET,

HTTP, UDP, TCP

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Specifications 

Item Min Typical Max Unit

Voltage 3.3 5 5.5 VDC

Current 25 60 400 mA

Transmit power 0-10 dBm

Frequency 2402~2480 MHz

Network rate

1-11 Mbps for

802.11b/6-54Mbps for

802.11g

Dimension 60x56x19 mm

Net Weight 20±2 g

Interface Function 

Usage 

The example we provided here is to show you how to connect this Wifi Shield to the Ethernet and get

data exchanging between the shield and a virtual server started.

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Hardware Installation

The package you receive should contain these parts: a Wifi Shield, an antenna and an antenna

connector.

 Assemble these parts together like the picture below.

Mount the shield onto your Arduino/Seeeduino

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Ok, time to write some code.

Software Programming

First you have to make sure that Arduino1.0 has already been installed on your computer.

Download the wifishield library here Wifi Shield.zip and unzip it into the libraries file of Arduino via

this path: ..\arduino-1.0\libraries

Open a new sketch in Arduino-1.0, then copy the following code to your sketch.

#include "Wifly.h"

#include <SoftwareSerial.h>

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WiflyClass Wifly(2,3);

void setup()

{

Serial.begin(9600);//use the hardware serial to communicate with the

PC

Wifly.init();//Initialize the wifishield

Wifly.setConfig("SSID","PASSWORD");//here to set the ssid and

password of the Router

Wifly.join("SSID");

Wifly.checkAssociated();

while(!Wifly.connect("192.168.1.164","90"));//connect the remote

service

Wifly.writeToSocket("Connected!");

}

void loop()

{

if(Wifly.canReadFromSocket())

{

Serial.print(Wifly.readFromSocket());

}

if(Serial.available())

{

Wifly.print((char)Serial.read());

}

}

You need to do some modifications on this sketch according to your specific configuration.

1.

WiflyClass Wifly(2,3);

The parameters 2 and 3 here represent RX and TX respectively for the software serial port. Based

on this, pins of D2 and D3 should be shorted as the picture below. You can change the pin number

as you like, just make sure corresponding changes on the shorted pins.

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2.Fill in wireless network information

Wifly.setConfig("SSID","PASSWORD");//here to set the ssid and

password of the Router

Wifly.join("SSID");

Fill the name of your target network into SSID and password into PASSWORD. For example, if you

like to join the China-NET and its password is 12345678, then this line of code should be changed

into:

Wifly.setConfig("China-NET","12345678");//here to set the ssid and

password of the Router

Wifly.join("China-NET");

Note: 1.Router Security type just support WEP-128, WPA-PSK (TKIP), WPA2-PSK (AES) 

2.Router must to connect Internet

3.Fill in the information of the remote server

while(!Wifly.connect("192.168.1.164","90"));//connect the remote

service

In the upper line, "192.168.1.164" is the remote IP address of the virtual server, and "90" is the port

information.

We provide a TCP Client software YFTCPServer.zip and serial port software SCCOM for testingpurpose.

Open the TCP Client software you will see:

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Change your lines according to the information you get from this software.

while(!Wifly.connect("192.168.1.164","90"));//connect the remote

service

Upload the sketch.

Now run the TCP Client software first, then the serial port software, click the "OpenCom" button, wait

until a message "<--Connected!" is printed on the screen of the virtual software.

Now you can communicate with the Wifi Shield via this serial port software.

For more detailed information about RN171, you can download the datasheet here RN171 Datasheet 

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Version Tracker  

Revision Descriptions Release

v1.0 Initial public release May 21, 2012

Support If you have questions or other better design ideas, you can go to our  Forum or  wish to discuss.

Resources 

  Wifi Shield Eagle File 

  RN171 Datasheet 

  Wifi Shield Library