Wishield 3led example sketch to pulsing output with WiShield.

Here is a sketch I’ve altered to turn on three L.E.D’s from a webpage, I would like to change it so it it instead pulses the led for a predetermined time, then turns off. (ok I’m a nube). There is an array that keep tracks of the “led status” with is cool, but instead of clicking on the led link (on the webpage) to turn the L.E.D. on and then off again. I was wondering how I would alter the code to instead, simply Pulse the led on for say 4 seconds. Is there a function within the arduino programming language that does this?

here is the original modified code thus far, I changed it from 3 L.E.D’s to 4 successfully, now I want to change the turning on and off, to just pulsing.
(I’m not as concerned with the web page updating as I am the arduino pulsing instead of just turning on and off when the link is clicked.

This code is the moved code from the Asynclabs completed projects forum.


  • A simple sketch that uses WiServer to serve a web page !! that kim messed with.

#include <WiServer.h>
#include <string.h>


#define ledPin4 4
#define ledPin1 5
#define ledPin2 6
#define ledPin3 7

// Wireless configuration parameters ----------------------------------------
unsigned char local_ip = { 192,168,10,50}; // IP address of WiShield
unsigned char gateway_ip = { 192,168,10,1}; // router or gateway IP address
unsigned char subnet_mask = { 255,255,255,0}; // subnet mask for the local network
const prog_char ssid PROGMEM = { “Sophie2”}; // max 32 bytes
unsigned char security_type = 3; // 0 - open; 1 - WEP; 2 - WPA; 3 - WPA2

// WPA/WPA2 passphrase
const prog_char security_passphrase PROGMEM = {“5544332211”}; // max 64 characters

// WEP 128-bit keys
// sample HEX keys
prog_uchar wep_keys PROGMEM = {
//0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, // Key 0
//0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Key 1
//0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Key 2
//0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // Key 3

// setup the wireless mode
// infrastructure - connect to AP
// adhoc - connect to another WiFi device
unsigned char wireless_mode = WIRELESS_MODE_INFRA;

unsigned char ssid_len;
unsigned char security_passphrase_len;

// End of wireless configuration parameters ----------------------------------------

boolean states[4]; //holds led states
char stateCounter; //used as a temporary variable
char tmpStrCat[64]; //used in processing the web page
char stateBuff[4]; //used in text processing around boolToString()
char numAsCharBuff[2];
char ledChange;

void boolToString (boolean test, char returnBuffer[4])
returnBuffer[0] = ‘\0’;
if (test)
strcat(returnBuffer, “On”);
strcat(returnBuffer, “Off”);

void writeStates()
//set led states
digitalWrite(ledPin1, states[0]);
digitalWrite(ledPin2, states[1]);
digitalWrite(ledPin3, states[2]);
digitalWrite(ledPin4, states[3]);

// This is our page serving function that generates web pages
boolean sendPage(char* URL) {


//check whether we need to change the led state
if (URL[1] == ‘?’ && URL[2] == ‘L’ && URL[3] == ‘E’ && URL[4] == ‘D’) //url has a leading /
ledChange = (int)(URL[5] - 48); //get the led to change.

for (stateCounter = 0 ; stateCounter < 4; stateCounter++)
if (ledChange == stateCounter)
states[stateCounter] = !states[stateCounter];
Serial.print("Have changed ");

//after having change state, return the user to the index page.
return true;

if (strcmp(URL, “/”) == false) //why is this not true?
WiServer.print(“Led switch”);

WiServer.print("Please select which dog treat you would like to dispence:\n

for (stateCounter = 0; stateCounter < 4; stateCounter++) //for each led
numAsCharBuff[0] = (char)(stateCounter + 49); //as this is displayed use 1 - 3 rather than 0 - 2
numAsCharBuff[1] = ‘\0’; //strcat expects a string (array of chars) rather than a single character.
//This string is a character plus string terminator.

tmpStrCat[0] = ‘\0’; //initialise string
strcat(tmpStrCat, “<a href=?LED”); //start the string
tmpStrCat[12] = (char)(stateCounter + 48); //add the led number
tmpStrCat[13] = ‘\0’; //terminate the string properly for later.

strcat(tmpStrCat, ">Dog Treat ");
strcat(tmpStrCat, "Beef ");
strcat(tmpStrCat, numAsCharBuff);
strcat(tmpStrCat, ": ");

boolToString(states[stateCounter], stateBuff);
strcat(tmpStrCat, stateBuff);
strcat(tmpStrCat, "

"); //we now have something in the range of Led 0: Off


WiServer.print(" ");
return true;

void setup() {
// Initialize WiServer and have it use the sendMyPage function to serve pages
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
pinMode(ledPin3, OUTPUT);
pinMode(ledPin4, OUTPUT);

states[0] = false;
states[1] = false;
states[2] = false;
states[3] = false;

void loop(){
// Run WiServer


I'm thinking I could use a loop like this in place of the digital write command...

void loop()
digitalWrite(ledPin, HIGH); // sets the LED on
delay(1000); // waits for a second
digitalWrite(ledPin, LOW); // sets the LED off
delay(1000); // waits for a second

and set the delay to as long as I want the pulse to last...

and I suspect I would imbed this in some kind of if than.

I guess I will mess around with this ... and see how it goes... :slight_smile: