//
//    FILE: solar-kiln.ino
//    AUTHOR: Liam Maskey for Fab Academy 2017 - based on DHT11 library from Rob Tillaart
//

#include <dht.h>
dht DHT1;
dht DHT2;


float ExtHumidityOffset;
float ExtHumidity;
char c = ' ';
int count;

#define DHT11_2_PIN 13 // external temperature/humidity sensor
#define DHT11_1_PIN 5  // internal temperature/humidity sensor
#define FAN 11        //  controls the fans
#define HUMIDITY_OFFSET 15  // needed to off set the external sensor as it reads larger humidity
#define ReadDht11 '1'       // command to send temperature and humidity over Bluetooh
#define FanOn '2'           // fan on override command
#define FanOff '3'          // fan off override command
#define OverrideOff '4'     // Overrides off
#define debug 0
#define period 60           // avererage period milliseconds
boolean FanOverrideOn ;
boolean FanOverrideOff ;
void setup()
{
  Serial.begin(9600);
  Serial.println("DHT TEST PROGRAM ");
  Serial.print("LIBRARY VERSION: ");
  Serial.println(DHT_LIB_VERSION);
  Serial.println();
  Serial.println("Type,\tstatus,\tHumidity (%),\tTemperature (C)");
  Serial1.begin(9600);
  pinMode(11,OUTPUT);
  FanOverrideOn = false;
  FanOverrideOff = false;
  count = 0;
  ExtHumidityOffset = 0;
  ExtHumidity = 0;
}

void loop()
{
  // READ DATA from first DHT11
  Serial.print("DHT11_1, \t");
  int chk1 = DHT1.read11(DHT11_1_PIN);
  switch (chk1)
  {
    case DHTLIB_OK:  
		Serial.print("OK,\t"); 
		break;
    case DHTLIB_ERROR_CHECKSUM: 
		Serial.print("Checksum error,\t"); 
		break;
    case DHTLIB_ERROR_TIMEOUT: 
		Serial.print("Time out error,\t"); 
		break;
    case DHTLIB_ERROR_CONNECT:
        Serial.print("Connect error,\t");
        break;
    case DHTLIB_ERROR_ACK_L:
        Serial.print("Ack Low error,\t");
        break;
    case DHTLIB_ERROR_ACK_H:
        Serial.print("Ack High error,\t");
        break;
    default: 
		Serial.print("Unknown error,\t"); 
		break;
  }
  // DISPLAY DATA
  Serial.print(DHT1.humidity, 1);
  Serial.print(",\t");
  Serial.println(DHT1.temperature, 1);

// READ DATA from second DHT11
  Serial.print("DHT11_2, \t");
  int chk2 = DHT2.read11(DHT11_2_PIN);
  switch (chk2)
  {
    case DHTLIB_OK:  
    Serial.print("OK,\t"); 
    break;
    case DHTLIB_ERROR_CHECKSUM: 
    Serial.print("Checksum error,\t"); 
    break;
    case DHTLIB_ERROR_TIMEOUT: 
    Serial.print("Time out error,\t"); 
    break;
    case DHTLIB_ERROR_CONNECT:
        Serial.print("Connect error,\t");
        break;
    case DHTLIB_ERROR_ACK_L:
        Serial.print("Ack Low error,\t");
        break;
    case DHTLIB_ERROR_ACK_H:
        Serial.print("Ack High error,\t");
        break;
    default: 
    Serial.print("Unknown error,\t"); 
    break;
  }

  Serial.print(DHT2.humidity, 1);
  Serial.print(",\t");
  Serial.println(DHT2.temperature, 1);

  

  // Read from HC05
  if (Serial1.available())
  {
    c = Serial1.read();
    switch(c){
      case ReadDht11:
      Serial1.print("External humidity is ");
      Serial1.print(DHT2.humidity, 1);
      Serial1.println("%");
      Serial1.print("External temperature is ");
      Serial1.print(DHT2.temperature, 1);
      Serial1.println("C");
      Serial1.print("Internal humidity is ");
      Serial1.print(DHT1.humidity, 1);
      Serial1.println("%");
      Serial1.print("Internal temperature is ");
      Serial1.print(DHT1.temperature, 1);
      Serial1.println("C");
      break;
      
      case FanOn:
      FanOverrideOn = true;
      FanOverrideOff = false;
      Serial1.print("Fan On");
      break;
      
      case FanOff:
      FanOverrideOn = false;
      FanOverrideOff = true;
      Serial1.print("Fan Off");
      break;
      
      case OverrideOff:
      FanOverrideOn = false;
      FanOverrideOff = false;
      Serial1.print("Fan overrides off");
      break;
      
      default:
      break;
    }
     
  }
 
  if (count < period){
    count++;
    ExtHumidityOffset = (ExtHumidityOffset + (DHT2.humidity - HUMIDITY_OFFSET));
    ExtHumidity = ExtHumidityOffset/count;
  }
  else{
    ExtHumidityOffset = 0;
    ExtHumidityOffset = 0;
    count = 0;
    if (DHT1.humidity > ExtHumidity)
        digitalWrite(FAN,HIGH);
     else
        digitalWrite(FAN,LOW);
  }
  
  Serial.print("Difference in  humdity is ");
  Serial.println(ExtHumidity);
  
  if(FanOverrideOn)
    digitalWrite(FAN,HIGH);
  else{
  if (FanOverrideOff)
    digitalWrite(FAN,LOW);
  }
 
  delay(1000);
  
  
}
//
// END OF FILE
//