// C++ code
//
void setup()
{
  Serial.begin(9600);
  pinMode(LED_BUILTIN, OUTPUT);
  
  pinMode(2,OUTPUT);// Relay PUMPS START/STOP =HIGH
  pinMode(3,OUTPUT);// Relay DRY RUN /STOP=HIGH 
  pinMode(4,OUTPUT);//PRIMING VALVE 
  pinMode(5,OUTPUT);//PRESSURE RELIEF VALVE
  pinMode(6,OUTPUT);//WATER LEVEL RELAY BACK
  
  pinMode(A0,INPUT);//PRESSURE SENSOR IN (0-5V)
  pinMode(A1,INPUT);//WATER FLOAT LEVEL INPUT 
  pinMode(A2,INPUT);//PUMPS STATUT ON OR OFF
  
  
}

void loop()
{
  
  int WaterLevel=analogRead(A1);
  
 
  if (WaterLevel<500 )//if water level is LOW Do 
   {
    digitalWrite(6,HIGH);//return information to gtb relay back 
    digitalWrite(2,HIGH);//stop the pumps
    tone (7,200,1000);
    delay (1000);
    tone (7,800,500);
    Serial.println(" attention niveau d'eau tres bas");
    delay(1000);
    
  }
 else {
   digitalWrite(6,LOW);//return information to gtb relay back 
    digitalWrite(2,LOW);//stop the pumps
 }

 
  
  int sensorValue = analogRead(A0);// read the Presure sensor value input on analog pin 0:
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
  float V = sensorValue * (5.0 / 1023.0);
  // print out the value you read:
  Serial.println(V);
  
if (V==0){
  Serial.println("attention capteur non connécté");
  tone(7,400,1000);
  
  digitalWrite(2,HIGH);//etindre la pompe 
  tone(7,200,1000);
  delay(1000);
 
  } 
  else 
  if (V>3.6){
  Serial.println("Présence d'aire");
  tone(7,400,1000);
  
  digitalWrite(2,HIGH);//etindre la pompe 
  tone(7,200,1000);
  delay(1000);
 
  } 
 }