esp32-garden-basics/02-water-pump/sketch/sketch.ino

/*

  C1 : humidité du sol
  C2 : remplissage du réservoir

  I1 : Circuit alimenté si On 
  I2 : Substrat sec si On
  I3 : Réservoir vide si On

  P1 : Pompe réservoir -> substrat

*/

#define AHUMITY A0
#define AWATER_LEVEL A1

#define LED_POWER 12 
#define LED_DRY 10 
#define LED_ALERT 8
#define PUMP 6

#define HUMIDITY_THRESHOLD 530 
#define WATER_LEVEL_THRESHOLD 530 

// Durations in seconds
#define DURATION_PUMP 30
#define DURATION_DELAY 1800
#define SECOND 3 // OR 1000

void setup() {
  Serial.begin(9600);
}


void loop() {
  int humity = analogRead(AHUMITY); 
  int water_level = analogRead(AWATER_LEVEL); 

  digitalWrite(LED_POWER, HIGH);

  bool is_dry = humity > HUMIDITY_THRESHOLD; 
  bool is_empty = water_level > WATER_LEVEL_THRESHOLD;

  if (is_dry){
    Serial.print("The soil is DRY (");
    digitalWrite(LED_DRY, HIGH);

  }else{
    Serial.print("The soil is WET (");
    digitalWrite(LED_DRY, LOW);
  } 

  Serial.print(humity);
  Serial.println(")");

  // if the water is too low, never pump
  if( is_empty ){
    Serial.println("The water level is LOW ");
    digitalWrite(LED_ALERT, HIGH);
  }else{
    Serial.println("The water level is HIGH");
    digitalWrite(LED_ALERT, LOW);
    if( is_dry){
      Serial.println("Starting the pump");
      digitalWrite(PUMP, HIGH);
      delay(DURATION_PUMP * SECOND);
      digitalWrite(PUMP, LOW);
      Serial.println("Stopped the pump");
    }
  }


  Serial.println("Sleeeping");
  delay(DURATION_DELAY * SECOND);
  Serial.println("Slept");

}