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#include "DHT.h"

#define DHTPIN1 12
#define DHTPIN2 10
#define DHTTYPE1 DHT22
#define DHTTYPE2 DHT22
DHT dht1(DHTPIN1, DHTTYPE1);
DHT dht2(DHTPIN2, DHTTYPE2);
float humidity1, temperature1, humidity2, temperature2, criticalTemperature;

float A0_val, A1_val, moisture1, moisture2, moistureAverage, setMoisture;

const int ventilPin = 5;
bool zalijevano;

int irrigationType;
double setVolume;


byte sensorInterrupt = 0;  // 0 = digital pin 2
int ventil;
float vrijeme;
float calibrationFactor = 7.5;
volatile byte pulseCount;
float flowRate;
float flowLitres;
double totalLitres;
unsigned long startTime, endTime, timeDifference;

int i = 0;

void setup()
{
  Serial.begin(9600);
  dht1.begin();
  dht2.begin();

  pulseCount = 0;
  flowRate   = 0.0;
  flowLitres = 0.0;
  totalLitres = 0.0;

  pinMode(13, OUTPUT);
  pinMode(ventilPin, OUTPUT);

  // The Hall-effect sensor is connected to pin 2 which uses interrupt 0.
  // Configured to trigger on a FALLING state change (transition from HIGH
  // state to LOW state)

  //attachInterrupt(sensorInterrupt, pulseCounter, FALLING);
}

void uzmiNoveVrijednosti(){

  //Temperatura i vlažnost zraka
  humidity1 = dht1.readHumidity();
  temperature1 = dht1.readTemperature();
  humidity2 = dht2.readHumidity();
  temperature2 = dht2.readTemperature();

  //Vlaznost zemlje
  A0_val = analogRead(0);
  A1_val = analogRead(1);
  moisture1 = (102400 / 939) - (100 * A0_val) / 939;
  moisture2 = (102400 / 939) - (100 * A1_val) / 939;
  if (moisture1 > 100.0) {
    moisture1 = 100.00;
  }
  if (moisture2 > 100.0) {
    moisture2 = 100.0;
  }
  moistureAverage = (moisture1 + moisture2) / 2;

  //Serial.println(temperature1);

}

void loop()
{
 int n;
 char v[10], u[10], vzr[10], vze[10], l[10];
  // put your main code here, to run repeatedly:
  //Serial.flush(); //flush all previous received and transmitted data
  while(!Serial.available()) ; // hang program until a byte is received notice the ; after the while()
  /*continue program ...*/

  while (Serial.available() > 0){
  n = Serial.parseInt();

  if (Serial.read() == '\n') {
    //Serial.println(n);
    switch(n){
      case 0:
        //delay(1000);
        //v-vanjska temp, u-unutarnja temp., vzr - vlaga zraka, vze - vlaga zemlje, lit-litara
        uzmiNoveVrijednosti();
        //String v = String(temperature1);
        //String u = String(temperature2);
        //String vzr = String(humidity1);
        //String vze = String(moistureAverrage);
        //String l = String(0);
        dtostrf(temperature1, 4, 2, v);
        dtostrf(temperature2, 4, 2, u);
        dtostrf(humidity1, 4, 2, vzr);
        dtostrf(moistureAverage, 4, 2, vze);
        dtostrf(flowLitres, 4, 2, l);
        Serial.print("v="+String(v)+"u="+String(u)+"vzr="+String(vzr)+"vze="+String(vze)+"lit="+String(l)+"ventil="+String(ventil)+"\n");
        break;
      case 1:
        digitalWrite(ventilPin, HIGH);
        ventil = 1;
        break;
      case 2:
        digitalWrite(ventilPin, LOW);
        ventil = 0;
        break;
    }
  }
  }
  //Serial.println("Read from raspberry");
  delay(1000);        // delay in between reads for stability


  if(n == 1 && i != 1){
    startTime = millis();
    attachInterrupt(sensorInterrupt, pulseCounter, FALLING);
    i = 1;
  }
  else if(n == 2 && i == 1){
    detachInterrupt(sensorInterrupt);
    endTime = millis();
    Serial.println(pulseCount);
    timeDifference = endTime - startTime;
    timeDifference = timeDifference/(1000*60); // 1000*60 da dobijem minute
    //Serial.print("timeDiff: ");
    //Serial.println(timeDifference);
    flowRate = pulseCount / (timeDifference * calibrationFactor); // protok u L/min
    /*Serial.print("flowRate: ");
    Serial.println(flowRate);*/
    flowLitres = (flowRate * timeDifference);
    i = 0;
    //unsigned int frac;
  }
}



//Insterrupt Service Routine
void pulseCounter()
{
    pulseCount++;
}