Arduino Sketch for Address Settable RF Wireless Power Supply Socket/Switch

Updated Sketch (Nov. 15,2014)

// Released by abocanegra on Dec. 11, 2009 using 4 pins, "DIP Switch 8 Position to Address Sensor" in Arduino Forum
// This sketch uses VirtualWire
// Connect the Receiver data pin to Arduino pin 11
// Modified by Befun Hung on Nov. 14, 2014 by combining sketches on May. 11, 2014 (Arduino RF Wireless Message Display)
// and Jul. 30, 2014 (Use DIP Switch To Set Arduino Device Net ID And Node ID for Wireless Communication - Updated Sketch) 
// and removing LCD Keypad Shield display function as a new sketch for Arduino addressable RF wireless power supply socket 
// Modified by Befun Hung on Nov. 12, 2014 to use
// 4 digital pins(D2-D5) to set node ID1 and
// 4 digital pins(D6-D9) to set node ID2 by using 10K pull-up resistors.
// Totally 8x16x16=2,048 devices can be used for wireless communication
// For practical use 8x10x10=800 devices can be controlled using digital key of 3x4 telephone keypad
// Wire and DIP switch connections from high bit to low bit are A1, A2, A3, D2, D3, D4, D5, D6, D7, D8 and D9  
// A0 is reserved for analog sensor or digital sensor/actuator 
// A4-A5 are reserved for I2C
// D0-D1 are reserved for RX/TX
// D13 is used for singal output
// Don't run this sketch on Arduino Pro Mini, it may reboot repeatedly owing to bootloader not supporting watchdog 

#include <VirtualWire.h>
// include avr/wdt for watchdog reset
#include <avr/wdt.h>
// include <EEPROM.h> to save switch staus to EEPROM
#include <EEPROM.h>
// keys to turn switch on and off
#define keyOn '*'
#define keyOff '#'

//Create and Define Global Variables
int bits=4, netID, nodeID1, nodeID2;
int dipNet[] = {15, 16, 17}; // DIP Switch Pins for Net ID
int dipNode1[] = {2, 3, 4, 5}; // DIP Switch Pins for Node ID1
int dipNode2[] = {6, 7, 8, 9}; // DIP Switch Pins for Node ID2

byte message[VW_MAX_MESSAGE_LEN]; // a buffer to store the incoming messages
byte messageLength = VW_MAX_MESSAGE_LEN; // the size of the message
unsigned long counter = 1;

// digital pin 13 connected with a 1K resistor and a LED
int led = 13;

// Address of EEPROM for saving switch status and variable to store value
int address = 5;
int value;

void setup()
{
  Serial.begin(9600);
  int i;
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
  netID = netAddress();
  // delay(100);
  Serial.print("Net ID: ");
  Serial.println(netID);
  
  for(i = 0; i<bits; i++){
    pinMode(dipNode1[i], INPUT);      // sets the digital pin 2-5 as input
  }
  nodeID1 = node1Address(bits);
  // delay(100);
  Serial.print("Node ID1: ");
  Serial.println(nodeID1);
  
  for(i = 0; i<bits; i++){
    pinMode(dipNode2[i], INPUT);      // sets the digital pin 2-5 as input
  }
  nodeID2 = node2Address(bits);
  // delay(100);
  Serial.print("Node ID2: ");
  Serial.println(nodeID2);
  Serial.println("Device is ready");
  // Initialize the IO and ISR
  vw_setup(2000); // Bits per sec
  vw_rx_start(); // Start the receiver
  
  //initialize the digital 13 pin as output
  pinMode(led, OUTPUT);
  // When the receiver is unstable and reboot, reading stored status from EEPROM 
  value = EEPROM.read(address);
  if (value == '1')
    {
      digitalWrite(led, HIGH);
    }
  if (value == '0')
    {
      digitalWrite(led, LOW);
    }
}

void loop()
{
   if (vw_get_message(message, &messageLength)) // Non-blocking
  {
    Serial.print(counter);
    Serial.print(": ");
    for (int i = 0; i < messageLength; i++)
    {
      Serial.write(message[i]);
    }
    // if length of received message is less than transmitter sent meaning the receiver is unstable 
    if (messageLength < 4)
      {
        software_Reboot();
      }
    else 
      {
        // netID and nodeID are numbers and message is charactor array, so convention is required
        if ((message[0] == (netID + '0')) && (message[1] == (nodeID1 + '0')) && (message[2] == (nodeID2 + '0')))
          {
            if (message[3] == keyOn) 
              {
              digitalWrite(led, HIGH);
              EEPROM.write(address, '1');
              }
            else 
              {
                if (message[3] == keyOff)
                  {
                    digitalWrite(led, LOW);
                    EEPROM.write(address, '0');
                  }
              }
          }
      }
    Serial.println();
    counter++;
  }
}

// Software reboot function
void software_Reboot()
{
  wdt_enable(WDTO_15MS);
  while (1)
  {
  }
}

//Create Net Address from DIP Switch (3 positions used A1-A3)
byte netAddress(){
  int i,j=0;
  
  //Get the switches state
  j = (j << 1) | (! digitalRead(A1));   // read the input pin
  j = (j << 1) | (! digitalRead(A2));   // read the input pin
  j = (j << 1) | (! digitalRead(A3));   // read the input pin
  return j; //return address
}

//Create Node1 Address from DIP Switch (4 positions used D2-D5)
byte node1Address(int k){
  int i,j=0;
  
  //Get the switches state
  for(i=0; i<k; i++){
  j = (j << 1) | (! digitalRead(dipNode1[i]));   // read the input pin
  }
  return j; //return address
}

//Create Node1 Address from DIP Switch (4 positions used D6-D9)
byte node2Address(int k){
  int i,j=0;
  
  //Get the switches state
  for(i=0; i<k; i++){
  j = (j << 1) | (! digitalRead(dipNode2[i]));   // read the input pin
  }
  return j; //return address
}

Sketch

// Released by abocanegra on Dec. 11, 2009 using 4 pins, "DIP Switch 8 Position to Address Sensor" in Arduino Forum
// This sketch uses VirtualWire
// Connect the Receiver data pin to Arduino pin 11
// Modified by Befun Hung on Oct. 29, 2014 by combining sketches on May. 11, 2014 (Arduino RF Wireless Message Display)
// and Jul. 30, 2014 (Use DIP Switch To Set Arduino Device Net ID And Node ID for Wireless Communication) 
// and removing LCD Keypad Shield display function as a new sketch for Arduino addressable RF wireless power socket 
// The sketch uses 3 analog pins(A1-A3) to set net ID and 8 digital pins(D2-D9) to set node ID by using 10K pull-up resistors.
// Totally 8x256=2,048 devices can be used for wireless communication
// When using a 3x4 telephone keypad, 8x10(0-9)=80 devices can be used
// A0 is reserved for analog sensor or digital sensor/actuator 
// A4-A5 are reserved for I2C
// D0-D1 are reserved for RX/TX
// D13 is used for singal output

#include <VirtualWire.h>
// include avr/wdt for watchdog reset
#include <avr/wdt.h>
// include <EEPROM.h> to save switch staus to EEPROM
#include <EEPROM.h>
// keys to turn switch on and off
#define keyOn '1'
#define keyOff '0'

//Create and Define Global Variables
int bits=8;
byte netID, nodeID;
int dipNet[] = {15, 16, 17}; //DIP Switch Pins for Net ID
int dipNode[] = {2, 3, 4, 5, 6, 7, 8, 9}; //DIP Switch Pins for Node ID

byte message[VW_MAX_MESSAGE_LEN]; // a buffer to store the incoming messages
byte messageLength = VW_MAX_MESSAGE_LEN; // the size of the message
unsigned long counter = 1;

// digital pin 13 connected with a 1K resistor and a LED
int led = 13;

// Address of EEPROM for saving switch status and variable to store value
int address = 5;
int value;

void setup()
{
  Serial.begin(9600);
  int i;
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
  netID = netAddress();
  Serial.print("Net ID: ");
  Serial.println(netID);
  for(i = 0; i<bits; i++){
    pinMode(dipNode[i], INPUT);      // sets the digital pin 2-9 as input
  }
  nodeID = nodeAddress(bits);
  Serial.print("Node ID: ");
  Serial.println(nodeID);
  Serial.println("Device is ready");
  // Initialize the IO and ISR
  vw_setup(2000); // Bits per sec
  vw_rx_start(); // Start the receiver
  
  //initialize the digital 13 pin as output
  pinMode(led, OUTPUT);
  // When the receiver is unstable and reboot, reading stored status from EEPROM 
  value = EEPROM.read(address);
  if (value == '1')
    {
      digitalWrite(led, HIGH);
    }
  if (value == '0')
    {
      digitalWrite(led, LOW);
    }
}
void loop()
{
  if (vw_get_message(message, &messageLength)) // Non-blocking
  {
    Serial.print(counter);
    Serial.print(": ");
    for (int i = 0; i < messageLength; i++)
    {
      Serial.write(message[i]);
    }
    // if length of received message is less than transmitter sent meaning the receiver is unstable 
    if (messageLength < 3)
      {
        software_Reboot();
      }
    else 
      {
        // netID and nodeID are numbers and message is charactor array, so convention is required
        if ((message[0] == (netID + '0')) && (message[1] == (nodeID + '0')))
          {
            if (message[2] == keyOn) 
              {
              digitalWrite(led, HIGH);
              EEPROM.write(address, '1');
              }
            else 
              {
                if (message[2] == keyOff)
                  {
                    digitalWrite(led, LOW);
                    EEPROM.write(address, '0');
                  }
              }
          }
      }
    Serial.println();
    counter++;
  }
}

// Software reboot function
void software_Reboot()
{
  wdt_enable(WDTO_15MS);
  while (1)
  {
  }
}

//Create Net Address from DIP Switch (3 positions used)
byte netAddress(){
  int i,j=0;
  
  //Get the switches state
  j = (j << 1) | (! digitalRead(A1));   // read the input pin
  j = (j << 1) | (! digitalRead(A2));   // read the input pin
  j = (j << 1) | (! digitalRead(A3));   // read the input pin
  return j; //return address
}

//Create Node Address from DIP Switch (8 positions used D2 - D9)
byte nodeAddress(int k){
  int i,j=0;
  
  //Get the switches state
  for(i=0; i<k; i++){
  j = (j << 1) | (! digitalRead(dipNode[i]));   // read the input pin
  }
  return j; //return address
}

3x4 Keypad Radio Frequency remote control

  To send digits to radio frequency receiver, a 3x4 keypad and a transmitter is a good combination. To use the keypad, the connection between keypad and pins has to be clarified. For my keypad, the connections are:

Keypad.1: Pin1 + Pin5
Keypad.2: Pin1 + Pin6
Keypad.3: Pin1 + Pin7
Keypad.4: Pin2 + Pin5
Keypad.5: Pin2 + Pin6
Keypad.6: Pin2 + Pin7
Keypad.7: Pin3 + Pin5
Keypad.8: Pin3 + Pin6
Keypad.9: Pin3 + Pin7
Keypad.*: Pin4 + Pin5
Keypad.0: Pin4 + Pin6
Keypad.#: Pin4 + Pin7

I just want to send 3 digits range from 000 to 999 to receiver running the sketch posted on May. 11, 2014. The result is showed on the following photo.

Connections

1. Transmitter.Vcc -> Arduino.5V
2. Transmitter.Gnd -> Arduino.Gnd
3. Transmitter.Data -> Arduino.D12
4. Keypad.Pin1 (ROW0) -> Arduino.D5
5. Keypad.Pin2 (ROW1) -> Arduino.D4
6. Keypad.Pin3 (ROW2) -> Arduino.D3
7. Keypad.Pin4 (ROW3) -> Arduino.D2
8. Keypad.Pin5 (COL0) -> Arduino.D8
9. Keypad.Pin6 (COL1) -> Arduino.D7
10. Keypad.Pin7 (COL2) -> Arduino.D6

Photo

Updated Sketch

// Modified by Befun Hung on Oct. 28, 2014   
// Blink led after sending message to notice user 5 times 
#include <Keypad.h>
#include <VirtualWire.h>

#define maxLength 3
const byte ROWS = 4; // four rows
const byte COLS = 3; // three columns
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};
// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins[ROWS] = {5, 4, 3, 2};
// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = {8, 7, 6};    // connect to the column pinouts of the keypad
char keyins[maxLength+1] = "";
int i=0, j=0, sendTimes=5;
int led=13;

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup() {
  Serial.begin(9600);
  // Initialize the IO and ISR
  vw_setup(2000); // Bits per sec
  Serial.println("Ready!");
  pinMode(led, OUTPUT);
}
  
void loop() {
    char key = keypad.getKey();
    if (key) {
      Serial.print(key);
      keyins[i] = key;
      i++;
      if (i == maxLength) {
        for (j=0;j<sendTimes;j++) {
          Serial.println();
          send(keyins);
          digitalWrite(led, HIGH);
          delay(20);
          digitalWrite(led, LOW);
          delay(20);
        }
        i = 0;
      } 
    }
}

void send(char *message)
{
  vw_send((uint8_t *)message, strlen(message));
  vw_wait_tx(); // Wait until the whole message is gone
}

Sketch

#include <Keypad.h>
#include <VirtualWire.h>

#define maxLength 3
const byte ROWS = 4; // four rows
const byte COLS = 3; // three columns
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};
// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins[ROWS] = {5, 4, 3, 2};
// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = {8, 7, 6};    // connect to the column pinouts of the keypad
char keyins[maxLength+1] = "";
int i=0;

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup() {
  Serial.begin(9600);
  // Initialize the IO and ISR
  vw_setup(2000); // Bits per sec
  Serial.println("Ready!");
}
  
void loop() {
    char key = keypad.getKey();
    if (key) {
      Serial.print(key);
      keyins[i] = key;
      i++;
      if (i == maxLength) {
        Serial.println();
        send(keyins);
        i = 0;
      }
    }
}

void send(char *message)
{
  vw_send((uint8_t *)message, strlen(message));
  vw_wait_tx(); // Wait until the whole message is gone
}

Use DIP Switch To Set Arduino Device Net ID And Node ID for Wireless Communication

  To use one remote control to many switch radio frequency wireless power supply sockets, each one must has its unique ID to identify itself and act according commands received from the remote control.
  In the example sketch, A2-A4 A1-A3 are set to 1, 0, 1; D2-D9 are set to 0,0,0,0,1,0,1,0. So the net ID is calculated as 1*4+0*2+1*1=5; node ID is calculated as 0*128+0*64+0*32+0*16+1*8+0*4+1*2+0*1=10.

Updated on Nov. 12, 2014
  Use the same DIP setting above, the output will be :
Net ID: 5
Node ID1: 0
Node ID2:10

Photo of Connections

Output

Update Sketch (Nov. 12, 2014)

// Released by abocanegra on Dec. 11, 2009 using 4 pins, "DIP Switch 8 Position to Address Sensor" in Arduino Forum
// Modified by Befun Hung on Jul. 30, 2014 to use 
// 3 analog pins(A1-A3) to set net ID 
// 8 digital pins(D2-D9) to set Node ID by using 10K pull-up resistors.
// Totally 8x256=2,048 devices can be used for wireless communication
// For practical use 8x10=80 devices can be controlled using digital key of 3x4 telephone keypad
// Modified by Befun Hung on Nov. 12, 2014 to use
// 4 digital pins(D2-D5) to set node ID1 and
// 4 digital pins(D6-D9) to set node ID2 by using 10K pull-up resistors.
// Totally 8x16x16=2,048 devices can be used for wireless communication
// For practical use 8x10x10=800 devices can be controlled using digital key of 3x4 telephone keypad
// Wire and DIP switch connections from high bit to low bit are A1, A2, A3, D2, D3, D4, D5, D6, D7, D8 and D9  
// A0 is reserved for analog sensor or digital sensor/actuator 
// A4-A5 are reserved for I2C
// D0-D1 are reserved for RX/TX
// D10-D13 are reserved for SPI

//Create and Define Global Variables
int bits=4, netID, nodeID1, nodeID2;
int dipNet[] = {15, 16, 17}; // DIP Switch Pins for Net ID
int dipNode1[] = {2, 3, 4, 5}; // DIP Switch Pins for Node ID1
int dipNode2[] = {6, 7, 8, 9}; // DIP Switch Pins for Node ID2

void setup()
{
  Serial.begin(9600);
  int i;
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
  netID = netAddress();
  // delay(100);
  Serial.print("Net ID: ");
  Serial.println(netID);
  
  for(i = 0; i<bits; i++){
    pinMode(dipNode1[i], INPUT);      // sets the digital pin 2-5 as input
  }
  nodeID1 = node1Address(bits);
  // delay(100);
  Serial.print("Node ID1: ");
  Serial.println(nodeID1);
  
  for(i = 0; i<bits; i++){
    pinMode(dipNode2[i], INPUT);      // sets the digital pin 2-5 as input
  }
  nodeID2 = node2Address(bits);
  // delay(100);
  Serial.print("Node ID2: ");
  Serial.println(nodeID2);
}

void loop()
{
  
}

//Create Net Address from DIP Switch (3 positions used A1-A3)
byte netAddress(){
  int i,j=0;
  
  //Get the switches state
  j = (j << 1) | (! digitalRead(A1));   // read the input pin
  j = (j << 1) | (! digitalRead(A2));   // read the input pin
  j = (j << 1) | (! digitalRead(A3));   // read the input pin
  return j; //return address
}

//Create Node1 Address from DIP Switch (4 positions used D2-D5)
byte node1Address(int k){
  int i,j=0;
  
  //Get the switches state
  for(i=0; i<k; i++){
  j = (j << 1) | (! digitalRead(dipNode1[i]));   // read the input pin
  }
  return j; //return address
}

//Create Node1 Address from DIP Switch (4 positions used D6-D9)
byte node2Address(int k){
  int i,j=0;
  
  //Get the switches state
  for(i=0; i<k; i++){
  j = (j << 1) | (! digitalRead(dipNode2[i]));   // read the input pin
  }
  return j; //return address
}

Sketch

// Released by abocanegra on Dec. 11, 2009 using 4 pins, "DIP Switch 8 Position to Address Sensor" in Arduino Forum
// Modified by Befun Hung on Jul. 30, 2014 to use 3 analog pins(A1-A3) to set net ID and 8 digital pins(D2-D9) to set node ID by using 10K pull-up resistors.
// Totally 8x256=2,048 devices can be used for wireless communication
// A0 is reserved for analog sensor or digital sensor/actuator 
// A4-A5 are reserved for I2C
// D0-D1 are reserved for RX/TX
// D10-D13 are reserved for SPI

//Create and Define Global Variables
int bits=8, netID, nodeID;
int dipNet[] = {15, 16, 17}; //DIP Switch Pins for Net ID
int dipNode[] = {2, 3, 4, 5, 6, 7, 8, 9}; //DIP Switch Pins for Node ID

void setup()
{
  Serial.begin(9600);
  int i;
  pinMode(A1, INPUT);
  pinMode(A2, INPUT);
  pinMode(A3, INPUT);
  netID = netAddress();
  // delay(100);
  Serial.print("Net ID: ");
  Serial.println(netID);
  
  for(i = 0; i<bits; i++){
    pinMode(dipNode[i], INPUT);      // sets the digital pin 2-9 as input
  }
  nodeID = nodeAddress(bits);
  // delay(100);
  Serial.print("Node ID: ");
  Serial.println(nodeID);
}

void loop()
{
  
}

//Create Net Address from DIP Switch (3 positions used)
byte netAddress(){
  int i,j=0;
  
  //Get the switches state
  j = (j << 1) | (! digitalRead(A1));   // read the input pin
  j = (j << 1) | (! digitalRead(A2));   // read the input pin
  j = (j << 1) | (! digitalRead(A3));   // read the input pin
  return j; //return address
}

//Create Node Address from DIP Switch (8 positions used D2 - D9)
byte nodeAddress(int k){
  int i,j=0;
  
  //Get the switches state
  for(i=0; i<k; i++){
  j = (j << 1) | (! digitalRead(dipNode[i]));   // read the input pin
  }
  return j; //return address
}

Freeduino/Arduino Web Sensors And Switches

Arduino Uno/Duemilanove is an useful gadget, combined with an W5100 Ethernet Shield , linked with some analog sensors and relays by wires, one can easily implements an simple remote web sensor monitoring and switch controlling system using an browser.

Pins Used

W5100 Ethernet Shield -- D10, D11, D12, D13
Analog Sensors -- A0, A1, A2, A3, A4, A5
Switches -- D2, D3, D4, D5, D6, D7, D8, D9

Output On Chrome Browser

Sketch


// modified from Instructables Arduino Led Server and Arduino Example WebServer 
// by Befun Hung on Oct. 20, 2012
// the sketch works on Arduino IDE 1.01

#include <Ethernet.h>
#include <SPI.h>
//network NB: Pins 10, 11, 12 and 13 are reserved for Ethernet module. 
#define sensorPinStart 0 //change to 2 if using Arduino Ethernet Shield 05 or 06
#define noOfSensors 2
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[] = { 192, 168, 1, 177 };
byte gateway[] = { 192, 168, 1, 1 };
byte subnet[] = { 255, 255, 255, 0 };
String inString = String(35);
String Led;
int led[] = {00, 2, 3, 4 ,5 ,6 ,7 ,8,9  }; //Led pins num 0 in arry is not used
int numofleds = 8; //numofleds
String value[] = {"off","off","off","off","off","off","off","off","off"}; //startup all led are off
EthernetServer server(80);
String data;

void setup()
{
  Serial.begin(9600);
  Ethernet.begin(mac, ip,gateway,subnet); 
  server.begin();
  //set pin mode
  for (int j = 1; j < (numofleds + 1); j++)
  {
    pinMode(led[j], OUTPUT);
  }
  Serial.println("Serial READY");
  Serial.println("Ethernet READY");
  Serial.println("Server READY");
}

void loop()
{
  EthernetClient client = server.available();  
  if (client)
  {
    // an http request ends with a blank line
    boolean current_line_is_blank = true;
    while (client.connected()) 
    {     
      if (client.available()) 
      {      
        char c = client.read();
        // if we've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so we can send a reply
        if (inString.length() < 35) 
        {
          inString.concat(c);
        } 
        if (c == '\n' && current_line_is_blank) 
        {                    
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println();
          client.println("<html>");
          client.println("<meta http-equiv=\"refresh\" content=\"5\">");
          client.println("<body><form method=get>");
          client.println("<center><p><h1>Freeduino/Arduino Web Sensor And Switch</h1></p><hr></center>"); 
          client.println("<h2>");
          client.println("Sensor Reading:<br>");
          for (int analogChannel = sensorPinStart ; analogChannel < sensorPinStart+noOfSensors ; analogChannel++)
          {
            int sensorReading = analogRead(analogChannel);
            client.print("Analog Input ");
            client.print(analogChannel);
            client.print(" : ");
            client.print(sensorReading);
            client.println("<br>");
          }
          client.println("<p></p>Switches Status:<br>");
          for(int i=1;i < (numofleds + 1) ;i++) 
          { 
            Led = String("Switch") + i;
            if(inString.indexOf(Led+"=off")>0 || inString.indexOf("all=on")>0)
            {
              Serial.println(Led+"on");
              digitalWrite(led[i], HIGH);
              value[i] = "on"; 
            }
            else if(inString.indexOf(Led+"=on")>0 || inString.indexOf("all=off")>0 )
            {          
              Serial.println(Led+"off");
              digitalWrite(led[i], LOW);
              value[i] = "off";
            }
            client.println(Led+"  <input type=submit name="+Led+" value="+value[i]+">"+"<br>");
          }
          client.println("<p></p>Switches Action:<br>");
          client.println("All <input type=submit name=all value=on><input type=submit name=all value=off>");
          client.println("</form><hr></h2>");
          client.println("<center>The web page will automatically refresh every 5 seconds.</center>");
          client.println("</html></body>");
          break;
        }
        if (c == '\n') 
        {
          // we're starting a new line
          current_line_is_blank = true;
        } 
        else if (c != '\r') 
        {
          // we've gotten a character on the current line
          current_line_is_blank = false;
        }
      }  // End of if (client.available)
    }  // End of while (client.connected())
    // give the web browser time to receive the data
    delay(1);
    inString = "";
    client.stop();
  } //End of if (client)
}