#include <WiFi.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";

String apiKey = "L3DL8ZA2B4D7QKLH";

int gasSensor = 34;
int led = 23;
int buzzer = 22;

void setup() {
  Serial.begin(115200);
    pinMode(led, OUTPUT);
      pinMode(buzzer, OUTPUT);

        WiFi.begin(ssid, password);
          while (WiFi.status() != WL_CONNECTED) {
              delay(500);
                  Serial.print(".");
                    }
                      Serial.println("WiFi Connected");
                      }

                      void loop() {
                        int gasValue = analogRead(gasSensor);
                          Serial.println(gasValue);

                            if (gasValue > 3000) {
                                digitalWrite(led, HIGH);
                                    digitalWrite(buzzer, HIGH);
                                      } else {
                                          digitalWrite(led, LOW);
                                              digitalWrite(buzzer, LOW);
                                                }

                                                  // Send to ThingSpeak
                                                    WiFiClient client;
                                                      if (client.connect("api.thingspeak.com", 80)) {
                                                          String url = "/update?api_key=" + apiKey + "&field1=" + String(gasValue);
                                                              client.print(String("GET ") + url + " HTTP/1.1\r\n" +
                                                                               "Host: api.thingspeak.com\r\n" +
                                                                                                "Connection: close\r\n\r\n");
                                                                                                  }

                                                                                                    delay(15000); // ThingSpeak limit
                                                                                                    }