S-project

#define relay 10
float soilSensorRead=0.0;
float soilMoisture = 0.0;
void setup() {
  Serial.begin(9600);
  pinMode(relay,OUTPUT);
}

void loop() {
  soilSensorRead=analogRead(A0);
  soilMoisture=100- map(soilSensorRead,0,1024,0,100);

  if (soilMoisture < 20) { //low moisture
   //rurn the relay on
      digitalWrite(relay,0);
  }
  else {  //High moisture
    //rurn the relay off
      digitalWrite(relay,1);
  }
  delay(1000);
}