#define CAYENNE_PRINT Serial   
//Library needed to connect to the Cayenne.       
#include <CayenneMQTTEthernet.h>  

// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username[] = "MQTTusername";
char password[] = "MQTTpassword";
char clientID[] = "ClientID";

//Variable required for countdown to send data.
unsigned long lastMillis = 0;  

//Previous output state.
int led=LOW;  

void setup() {
	//Starting communication via serial interface at 9600 baud.
  Serial.begin(9600);
  //Starting Cayenne library and start communication with the Cayenne MQTT server.
	Cayenne.begin(username, password, clientID);
  //Set pin 4 as input.
  pinMode(4, INPUT);   
  //Set pin 5 as output. You can then connect relay, LED, motor, ...
  pinMode(5, OUTPUT); 
}

void loop() {
	Cayenne.loop();
	//Publish data every 10 seconds (10000 milliseconds). Change this value to publish at a different interval.
	if(millis() - lastMillis > 10000) {
		lastMillis = millis();
		//Write data to Cayenne here. This example just sends the current uptime in milliseconds.
		Cayenne.virtualWrite(0, lastMillis);
		//Some examples of other functions you can use to send data.
		//Cayenne.celsiusWrite(1, 22.0);
		//Cayenne.luxWrite(2, 700);
		//Cayenne.virtualWrite(3, 50, TYPE_PROXIMITY, UNIT_CENTIMETER);
	}
 
  if(digitalRead(4)==HIGH && led==LOW)  //When you press the button and the LED is OFF, then
  {
    digitalWrite(5, HIGH);  //Turn ON LED.
    led=HIGH;  //Save that is LED ON.
    Cayenne.virtualWrite(1,"1");  //Sends the value to Cayenne about that the LED is ON.
    while(digitalRead(4)==HIGH)
    {
      delay(10);
    }
  }
  
  if(digitalRead(4)==HIGH && led==HIGH)  //When you press the button and the LED is ON, then
  {
    digitalWrite(5, LOW);  //Turn OFF LED.
    led=LOW;  //Save that is LED OFF.
    Cayenne.virtualWrite(1,"0");  //Sends the value to Cayenne about that the LED is OFF.
    while(digitalRead(4)==HIGH)
    {
      delay(10);
    }
  }
}

//Default function for processing actuator commands from the Cayenne Dashboard.
//You can also use functions for specific channels, e.g CAYENNE_IN(1) for channel 1 commands.
CAYENNE_IN_DEFAULT()
{
	CAYENNE_LOG("CAYENNE_IN_DEFAULT(%u) - %s, %s", request.channel, getValue.getId(), getValue.asString());
	//Process message here. If there is an error set an error message using getValue.setError(), e.g getValue.setError("Error message");
  if (request.channel = 1)
  {
    //Variables for input values.
    String value;
    value = (String)getValue.asString();
    //When you press the button on the Cayenne Dashboard, then
    if (value == "1")
    {
      digitalWrite(5, HIGH); //Turn ON LED.
      led=HIGH;  //Save that is LED ON.
    }
    else
    {
      digitalWrite(5, LOW);  //Turn OFF LED.
      led=LOW;  //Save that is LED OFF.
    }
  }
}