mqttlightcontrol_switchside.ino

/* 
Toggle switch to send relevant mqtt message to turn on/off device.

Code originated in the Debounce Example and has been hacked to bits
 
 created 21 November 2006
 by David A. Mellis
 modified 30 Aug 2011
 by Limor Fried
 modified 28 Dec 2012
 by Mike Walters
 
 This example code is in the public domain.
 http://www.arduino.cc/en/Tutorial/Debounce
 */
#include <SPI.h>
#include <Ethernet.h>
#include <PubSubClient.h>
#include <OneWire.h>



// Update these with values suitable for your network.
byte mac[]    = {  0xDE, 0xED, 0xBA, 0xFE, 0xFE, 0xED };
OneWire ds(2);

#define MQTT_SERVER "192.168.1.3"
IPAddress ip(192,168,1, 178);
IPAddress gateway(192,168,1, 1);
IPAddress subnet(255, 255, 255, 0);

// constants won't change. They're used here to 
// set pin numbers:
const int buttonPin = 7;     // the number of the pushbutton pin
const int ledPin =  13;      // the number of the LED pin

// Variables will change:
int ledState = HIGH;         // the current state of the output pin
int buttonState;	     // the current reading from the input pin
char* swState;
int lastButtonState = LOW;   // the previous reading from the input pin

// the following variables are long's because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
long lastDebounceTime = 0;  // the last time the output pin was toggled
long debounceDelay = 50;    // the debounce time; increase if the output flickers


void callback(char* topic, byte* payload, unsigned int length) {
  // handle message arrived
}

EthernetClient ethClient;
PubSubClient client(MQTT_SERVER, 1883, callback, ethClient);

void setup()
{
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);
    Serial.begin(9600);
     byte i;
  byte dsAddress[8]; //ds on pin 8
 
  Serial.begin(9600);
  delay( 500 );
  Serial.print ("Searching for DS18B20...");
 ds.reset_search(); // Start the search with the first device
  
  if ( !ds.search(dsAddress) )
  {
    Serial.println("none found. Using specified MAC Address.");
  } else {
    Serial.print( "Success! \nSetting MAC address...." );

  mac[1] = dsAddress[3];
  mac[2] = dsAddress[4];
  mac[3] = dsAddress[5];
  mac[4] = dsAddress[6];
  mac[5] = dsAddress[7];
  }
  Serial.print( "Ethernet MAC =" );
  for( i = 0; i < 6; i++ )
  {
    Serial.write( ' ' );
    Serial.print( mac[i], HEX );
  }
  Serial.println();
  
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    for(;;)
      ;
  }
  Serial.print("IP address: ");
  for (byte thisByte = 0; thisByte < 4; thisByte++) {
    // print the value of each byte of the IP address:
    Serial.print(Ethernet.localIP()[thisByte], DEC);
  }
  delay(10);
  Serial.println();
//if (client.connect("SW1")) {      // connecting to MQTT server
//   Serial.println("Connected to MQTT");      // Milestone for connection debugging
//  }
}

void loop()
{
 // read the state of the switch into a local variable:
  int reading = digitalRead(buttonPin);

 

  // check to see if you just pressed the button 
  // (i.e. the input went from LOW to HIGH),  and you've waited 
  // long enough since the last press to ignore any noise:  

  // If the switch changed, due to noise or pressing:
  if (reading != lastButtonState) {
    // reset the debouncing timer
    lastDebounceTime = millis();
    
   // this is all that's new to the code 
   // toggles the ledState variable each time the button is pressed 
      if (buttonState == HIGH) {
      ledState = !ledState;
      Serial.println(ledState);
      Serial.println("sending state");
      client.connect("SW1");
      if (ledState == 0){
        swState = "2-40";
      }
      if (ledState == 1){
        swState = "2-41";
      }
      client.publish("house/room1/1",swState);
    } 
  } 
  
  if ((millis() - lastDebounceTime) > debounceDelay) {
    // whatever the reading is at, it's been there for longer
    // than the debounce delay, so take it as the actual current state:
    buttonState = reading;
  }
  

  
  // set the LED using the state of the button:
//  digitalWrite(ledPin, ledState);

  // save the reading.  Next time through the loop,
  // it'll be the lastButtonState:
  lastButtonState = reading;
}