#include <WiFi.h>
#include "DHT.h"

// DHT Sensor
#define DHTPIN 27       // GPIO pin where the DHT22 is connected
#define DHTTYPE DHT22  // DHT 22 (AM2302)
// Ultrasonic Sensor
#define trigPin 26
#define echoPin 25

// Initialize DHT sensor
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // put your setup code here, to run once:
  dht.begin();
  pinMode(33, OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  Serial.begin(115200); // Initialize serial communication for debugging
  Serial.println("Pendeteksi Banjir / Flood Detection");
  delay(10);
}

void loop() {
  // put your main code here, to run repeatedly:
  float humidity = dht.readHumidity();
  long duration, distance;
  float waterLevel;

  // Clear the trigger pin and wait for a short delay
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  
  // Set the trigger pin to high for 10 microseconds to transmit the ultrasonic pulse
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  // Read the echo pin to measure the duration of the pulse and calculate the distance
  duration = pulseIn(echoPin, HIGH);
  distance = (duration * 0.0343) / 2; // Calculate the distance in cm (speed of sound is 0.0343 cm/microsecond)
  
  // Assuming height from the ground is 1 meter, calculate the water level in percentage
  waterLevel = 100 - (distance * 100 / 200);

  if(humidity == 100 && waterLevel >= 60) {
    digitalWrite(33, HIGH);
    Serial.println("!! HIGH FlOOD DETECTED !!");
    Serial.print("Humidity Sent is:");
    Serial.print(humidity);
    Serial.println(" %");
  } 
  else if(humidity == 100 && waterLevel < 60) {
    digitalWrite(33, HIGH);
    Serial.println("! LOW FLOOD DETECTED !");
    Serial.print("Humidity Sent is:");
    Serial.print(humidity);
    Serial.println(" %");
  } 
  else if(humidity < 100) {
    Serial.print("No Flood Detected, Safe  ");
    Serial.print("Humidity Sent is:");
    Serial.print(humidity);
    Serial.println(" %");
    digitalWrite(33, LOW);
  }
  delay(50); // this speeds up the simulationdelay(10); // this speeds up the simulation
}