#include <WiFi.h>
#include <WiFiClient.h>
#include <ThingSpeak.h>

const char *ssid = "Wokwi-GUEST";  // Masukkan SSID WiFi Anda
const char *password = "";  // Masukkan password WiFi Anda

const int potPin = 34;  // Pin untuk potensiometer (pengganti sensor gas)
const int buzzerPin = 14;  // Pin untuk buzzer
const int ledPin = 13;  // Pin untuk LED

int threshold = 500;  // Ambang batas untuk mendeteksi gas (sesuaikan dengan kondisi nyata)

const char *thingSpeakApiKey = "LUQQIHLCPEYT82Y4";  // Masukkan API Key Thingspeak Anda
const int channelID = 2396496; // Masukkan Channel ID Thingspeak Anda

WiFiClient client;

void setup() {
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  
  Serial.begin(115200);
  delay(100);
  
  WiFi.begin(ssid, password);
  Serial.println("Connecting to WiFi");
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting...");
  }
  Serial.println("Connected to WiFi");
  
  ThingSpeak.begin(client);
}

void loop() {
  int sensorValue = analogRead(potPin);  // Membaca nilai potensiometer
  
  if (sensorValue > threshold) {
    Serial.println("Gas Detected!");
    digitalWrite(buzzerPin, HIGH);  // Aktifkan buzzer
    digitalWrite(ledPin, HIGH);     // Nyalakan LED
    tone(buzzerPin, 1000);          // Menghasilkan bunyi dengan frekuensi 1000 Hz
    
    // Kirim data ke ThingSpeak jika terdeteksi gas
    ThingSpeak.setField(1, sensorValue);  // Field 1 di ThingSpeak
    ThingSpeak.setField(2, sensorValue * 2);  // Field 2 di ThingSpeak
    ThingSpeak.setField(3, sensorValue / 2);  // Field 3 di ThingSpeak
    
    ThingSpeak.writeFields(channelID, thingSpeakApiKey);
  } else {
    digitalWrite(buzzerPin, LOW);  // Matikan buzzer
    digitalWrite(ledPin, LOW);     // Matikan LED
    noTone(buzzerPin);             // Berhenti mengeluarkan bunyi pada buzzer
    
    // Jika tidak ada gas yang terdeteksi, set field ThingSpeak ke nilai 0
    ThingSpeak.setField(1, 0);  
    ThingSpeak.setField(2, 0);
    ThingSpeak.setField(3, 0);
    
    ThingSpeak.writeFields(channelID, thingSpeakApiKey);
  }
  
  delay(10000);  // Delay sebelum pembacaan ulang nilai sensor (dalam contoh ini, 10 detik)
}