//-------------
// SETA43
// 06/05/2014
//-------------

#include <avr/io.h>
#include <avr/interrupt.h>

#include <avr/sleep.h>

#include <Wire.h>
#include <VirtualWire.h>
#include "DHT.h"

#define DHTPIN 3     // what pin we're connected to

// Uncomment whatever type you're using!
//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302)
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

unsigned int ih,it;
int sensorValue1, sensorValue2;

DHT dht(DHTPIN, DHTTYPE);

const int TX_DIO_Pin = 2;

int z,contador;

void setup() {
  
  pinMode(13, OUTPUT);
  pinMode(12, INPUT);

  vw_set_tx_pin(TX_DIO_Pin);
  vw_set_ptt_inverted(true);
  vw_setup(2000);

  Serial.begin(9600);
  Serial.println("DHTxx test!");
 
  dht.begin();
  
  watchdogOn(); // Turn on the watch dog timer.
  //Desactiva conversor A/D
  ADCSRA = ADCSRA & B01111111;
  ACSR = B10000000;
 
  contador=0;
}

void loop() {
 unsigned int Data;
 byte TxBuffer[2];
 
  float h = dht.readHumidity();
  float t = dht.readTemperature();


  if (isnan(t) || isnan(h))
    {
    Serial.println("Failed to read from DHT");
    }
  else
    {
    
    ih=h*100;
    it=t*100;
 
    sensorValue1=222;
    sensorValue2=contador;
    
    digitalWrite(13, HIGH);
    
    TxBuffer[0] = 33333 >> 8;
    TxBuffer[1] = 33333;
    vw_send((byte *)TxBuffer, 2);
    vw_wait_tx();
    
    TxBuffer[0] = ih >> 8;
    TxBuffer[1] = ih;
    vw_send((byte *)TxBuffer, 2);
    vw_wait_tx();
    
    TxBuffer[0] = it >> 8;
    TxBuffer[1] = it;
    vw_send((byte *)TxBuffer, 2);
    vw_wait_tx();
    
    TxBuffer[0] = sensorValue1 >> 8;
    TxBuffer[1] = sensorValue1;
    vw_send((byte *)TxBuffer, 2);
    vw_wait_tx();
    
    TxBuffer[0] = sensorValue2 >> 8;
    TxBuffer[1] = sensorValue2;
    vw_send((byte *)TxBuffer, 2);
    vw_wait_tx();
        
    Serial.print(ih); Serial.print(" %  ");
    Serial.print(it); Serial.print(" C  ");
    Serial.println(contador);  
    
    delay(500);
    digitalWrite(13, LOW);
    
    for(z=0;z<60 && HIGH==digitalRead(12) ;z++)goToSleep();
    contador++;
    if(contador>100) contador=0;
    delay(100);

    digitalWrite(13, HIGH);

    }
  
}

void goToSleep()   
{    
  set_sleep_mode(SLEEP_MODE_PWR_DOWN); // Set sleep mode.
  sleep_enable(); // Enable sleep mode.
  sleep_mode(); // Enter sleep mode.
  sleep_disable(); // Disable sleep mode after waking.                     
}

void watchdogOn()
{
  //Fuente http://www.fiz-ix.com/2012/11/low-power-arduino-using-the-watchdog-timer/
  // Clear the reset flag, the WDRF bit (bit 3) of MCUSR.
  MCUSR = MCUSR & B11110111;
  WDTCSR = WDTCSR | B00011000;
  //WDTCSR = B00000101; //0.5S
  WDTCSR = B00000110; //1S
  //WDTCSR = B00100001; //8S

  // Enable the watchdog timer interupt.
  WDTCSR = WDTCSR | B01000000;
  MCUSR = MCUSR & B11110111;
}


ISR(WDT_vect)
{
  //No hace nada
  
}