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

// WiFi (Wokwi default)
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// ThingSpeak
unsigned long channelID = 3274386;      // 🔴 Put your Channel ID
const char* writeAPIKey = "ZAUTKY9R53X6J97H";       // 🔴 Put your Write API Key

WiFiClient client;

// Pins
#define GAS_SENSOR 34
#define BUZZER 25

// Gas threshold (adjust if needed)
int gasThreshold = 1800;

void setup() {
  Serial.begin(115200);

    pinMode(GAS_SENSOR, INPUT);
      pinMode(BUZZER, OUTPUT);

        // Connect WiFi
          Serial.print("Connecting to WiFi");
            WiFi.begin(ssid, password);
              while (WiFi.status() != WL_CONNECTED) {
                  delay(500);
                      Serial.print(".");
                        }
                          Serial.println("\nWiFi Connected");

                            ThingSpeak.begin(client);
                            }

                            void loop() {
                              int gasValue = analogRead(GAS_SENSOR);
                                Serial.print("Gas Level: ");
                                  Serial.println(gasValue);

                                    // Alert
                                      if (gasValue > gasThreshold) {
                                          digitalWrite(BUZZER, HIGH);
                                            } else {
                                                digitalWrite(BUZZER, LOW);
                                                  }

                                                    // Send to ThingSpeak (Field 1)
                                                      ThingSpeak.writeField(channelID, 1, gasValue, writeAPIKey);

                                                        delay(15000); // ThingSpeak update interval
                                                        }