esp32-garden-basics/01-resistance/sketch/sketch.ino

/*

  C1 : humidité du sol

  I1 : Circuit alimenté si On 
  I2 : Substrat sec si On
  
*/



#define AOUT_PIN A7 

#define LED_POWER 12
#define LED_POW_G 11
#define LED_ALERT 10
#define LED_ALE_G 9


#define THRESHOLD 530 // CHANGE YOUR THRESHOLD HERE



void setup() {
  // put your setup code here, to run once:

  Serial.begin(9600);

  // Set to LOW to use as ground
  pinMode( LED_POWER, OUTPUT);
  pinMode( LED_POW_G, OUTPUT);
  pinMode( LED_ALERT, OUTPUT);
  pinMode( LED_ALE_G, OUTPUT);
  digitalWrite(LED_POW_G , LOW);
  digitalWrite(LED_ALE_G , LOW);

}


void loop() {
  int value = analogRead(AOUT_PIN); // read the analog value from sensor

  digitalWrite(LED_POWER, HIGH);

  if (value > THRESHOLD){
    Serial.print("The soil is DRY (");
    digitalWrite(LED_ALERT, HIGH);

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


  // Stay up a bit longer for display
  delay(100);


  digitalWrite(LED_POWER, LOW);
  digitalWrite(LED_ALERT, LOW);

  delay(10000);
}