/*
 * Rain Detection System - ระบบตรวจจับฝน
 */

// กำหนดขา Pin
const int rainSensorPin = A0;
const int buzzerPin = 8;

// ตัวแปร
int sensorValue = 0;
int threshold = 500;        // ปรับค่าได้
bool rainDetected = false;

void setup() {
  Serial.begin(9600);
  pinMode(buzzerPin, OUTPUT);
  digitalWrite(buzzerPin, LOW);
  
  Serial.println("Rain Detection Ready!");
  Serial.println("Threshold: " + String(threshold));
}

void loop() {
  sensorValue = analogRead(rainSensorPin);
  
  Serial.print("Sensor: ");
  Serial.print(sensorValue);
  
  if (sensorValue < threshold) {
    // ตรวจพบฝน
    if (!rainDetected) {
      rainDetected = true;
      Serial.println(" -> Rain Detected! 🌧️");
      
      // เสียงเตือน 3 ครั้ง
      for (int i = 0; i < 3; i++) {
        digitalWrite(buzzerPin, HIGH);
        delay(200);
        digitalWrite(buzzerPin, LOW);
        delay(200);
      }
    } else {
      Serial.println(" -> Still Raining...");
      digitalWrite(buzzerPin, HIGH);
      delay(100);
      digitalWrite(buzzerPin, LOW);
    }
  } else {
    // ไม่มีฝน
    if (rainDetected) {
      rainDetected = false;
      Serial.println(" -> Rain Stopped ☀️");
      digitalWrite(buzzerPin, LOW);
    } else {
      Serial.println(" -> No Rain");
    }
  }
  
  Serial.println(rainDetected ? "Status: RAIN" : "Status: DRY");
  Serial.println("----------");
  
  delay(1000);
}