// Koding Relay-------------------------------------------------------------->
#define shd 12
#define tmp 13
int state;
//Koding HJ-SRO4T------------------------------------------------------------------->
#define PIN_TRIG 18
#define PIN_ECHO 19
#define wr 21


// Koding DHT-------------------------------------------------------------->
const float BETA = 3950;

void setup() {
  // Koding Relay-------------------------------------------------------------->
  Serial.begin(115200);
  pinMode(shd, OUTPUT);
  digitalWrite(shd, HIGH);
  pinMode(tmp, OUTPUT);
  digitalWrite(tmp, LOW);
  pinMode(PIN_TRIG, OUTPUT);
  pinMode(PIN_ECHO, INPUT);
  pinMode(wr, OUTPUT);
  }

void loop() {
      // Koding NTC-------------------------------------------------------------->
  int analogValue = analogRead(22);
  float celsius = 1 / (log(1 / (1023. / analogValue - 1)) / BETA + 1.0 / 298.15) + 65;
  Serial.print("Temperature: ");
  Serial.print(celsius);
  Serial.println(" ℃");
  delay(1000);

  // Koding Kondisi Secure--------------------------------------------------------------
if (analogValue < 50){
  state = 1;
  digitalWrite(tmp, LOW);
  digitalWrite(shd, HIGH);
  Serial.println("BOILER CONDITION : SECURE (AMAN)");
 }

 // Koding Kondisi High Temperatur--------------------------------------------------------------
if (analogValue  > 50){
  state = 2;
  digitalWrite(tmp, HIGH);
  digitalWrite(shd, HIGH);
  Serial.println("BOILER CONDITION : HIGH TEMPERATURE (SUHU TINGGI)"); 
 }

 // Koding Kondisi High Pressure--------------------------------------------------------------
if (analogValue  > 60){
  state = 3;
  digitalWrite(tmp, LOW);
  digitalWrite(shd, LOW);
  Serial.println ("BOILER CONDITION : HIGH PRESSURE (TEKANAN TINGGI)"); 
  }
  // Koding Kondisi Danger--------------------------------------------------------------
if (analogValue > 70){
  state = 4;
  digitalWrite(shd, LOW);
  digitalWrite(tmp, HIGH);
  Serial.println ("BOILER CONDITION : DANGER (BAHAYA)"); 
 }
 Serial.println("---(CONVERTING TO REAL TIME MONITORING)------");
 delay(2000);

  // Koding Ultrasonik--------------------------------------------------------------
  digitalWrite(PIN_TRIG, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIG, LOW);

  // Read the result:
  int duration = pulseIn(PIN_ECHO, HIGH);
  Serial.print("Distance in CM: ");
  Serial.println(duration/58);

  // Volume = 40x28x24 (26000cm), skala 1:100
  // Koding Kondisi UNFILLING----------------------
  if ((duration/58) >= 260){
  digitalWrite(wr, LOW);
  Serial.println("FEED WATER CONDITION : UNFILLING");
  }
 // Koding Kondisi Filling-----------------------
  if ((duration/58) <= 87){
  digitalWrite(wr, HIGH);
  Serial.println ("FEED WATER CONDITION : FILLING");
  }
  Serial.println("---(CONVERTING TO REAL TIME MONITORING)------");
  delay(2000);

}