/*.............................................................
Sending Multiple Variables Using VirtualWire. Transmitter
Author: Rodrigo Mompo Redoliww  http://controlrobotics.rodrigomompo.com
Modified by  deba168 from INDIA on 05/09/2014
..............................................................*/
#include <VirtualWire.h>
#include "LowPower.h"
#include "DHT.h"
#define DHTPIN 8     // what pin we're connected to
#define DHTTYPE DHT11   // DHT 11 
DHT dht(DHTPIN, DHTTYPE);
int ledPin = 13;
char Msg[30];// The string that we are going to send trought rf transmitter 
 
void setup() 
{
  dht.begin();  // initialing the DHT sensor
  pinMode(ledPin,OUTPUT);
  // VirtualWire setup
  vw_setup(2000); // Bits per sec
  vw_set_tx_pin(12);// Set the Tx pin. Default is 12
}
 
void loop() 
{
 
  // Read and store Sensor Data
  int humidity = dht.readHumidity();
  int temp = dht.readTemperature();
  int f = dht.readTemperature(true);
  int hi_f = dht.computeHeatIndex(f,humidity); //heat index in fahrenheit
  int heat_index  =(hi_f-32)*5/9; // convert heat index to celcius
  sprintf(Msg, "%d,%d,%d", humidity,temp ,heat_index);
 // Turn on a light to show transmitting
  digitalWrite(ledPin, HIGH); 
 //LowPower.powerDown(SLEEP_250MS, ADC_OFF, BOD_OFF);  
  delay(100); 
  vw_send((uint8_t *)Msg, strlen(Msg));
  vw_wait_tx(); // Wait until the whole message is gone
 // Turn off a light after transmission
  digitalWrite(ledPin, LOW); 
  // put 5 mins sleep mode
  // As lowpower library support maximam 8s ,we use for loop to take longer (5mins) sleep
  // 5x60=300
  //300/4=75
  for(int i=0;i<75;i++)
  {
  LowPower.powerDown(SLEEP_4S, ADC_OFF, BOD_OFF);    // Instead of delay(4000); 
 //delay(4000);
  }
}