const int moisturePin = A0; // Soil moisture sensor pin
const int relayPin = 8;     // Relay control pin
const int buzzerPin = 9;    // Buzzer pin
const int moistureThreshold = 400; // Adjust based on your sensor


// Dry Soil: Around 0 to 300 (lower values indicate less moisture).
// Normal/Moist Soil: Around 300 to 600 (suitable moisture level for most plants).
// Wet Soil: Above 600 (high moisture level, soil may be saturated).


void setup() {
  pinMode(moisturePin, INPUT);
  pinMode(relayPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int moistureLevel = analogRead(moisturePin);
  Serial.print("Moisture Level: ");
  Serial.println(moistureLevel);

  if (moistureLevel > moistureThreshold) { // If soil is dry
    digitalWrite(relayPin, HIGH); // Turn on the relay (activates pump)
    digitalWrite(buzzerPin, HIGH); // Sound the buzzer
    delay(3000);                   // Watering time (adjust as needed)
    digitalWrite(relayPin, LOW);   // Turn off the relay (stops pump)
    digitalWrite(buzzerPin, LOW);  // Turn off buzzer
  } else {
    
    digitalWrite(relayPin, LOW);   // Make sure pump is off
    digitalWrite(buzzerPin, LOW);  // Make sure buzzer is off
  }

  delay(1000); // Delay between readings
}