#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <PubSubClient.h>

#define PPM_PIN 34

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "b816166856034438bea88292bd05250e.s1.eu.hivemq.cloud";
const int mqtt_port = 8883;
const char* mqtt_user = "hivemq.webclient.1739493434095";  // Ganti dengan username HiveMQ
const char* mqtt_pass = "3lKSpx2BIP8j5&?a<,Le";  // Ganti dengan password HiveMQ

WiFiClientSecure espClient;
PubSubClient client(espClient);

void setup_wifi() {
  Serial.print("Connecting to WiFi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected to WiFi");
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Connecting to MQTT...");
    espClient.setInsecure(); // Gunakan jika tidak ada sertifikat
    if (client.connect("ESP32Client", mqtt_user, mqtt_pass)) {
      Serial.println("Connected!");
    } else {
      Serial.print(" failed, rc=");
      Serial.print(client.state());
      Serial.println(" retrying in 5s...");
      delay(5000);
    }
  }
}

void setup() {
  Serial.begin(115200);
  setup_wifi();
  espClient.setInsecure();  // Gunakan jika tidak ada sertifikat
  client.setServer(mqtt_server, mqtt_port);

  pinMode(PPM_PIN, INPUT);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  int16_t ppmValue = analogRead(PPM_PIN);
  int mappedppmValue = map(ppmValue, 0, 4095, 0, 1000);

  Serial.print("PPM: ");
  Serial.println(mappedppmValue);

  // Kirim ke MQTT
  String payload = String(mappedppmValue);
  client.publish("ppm/1", payload.c_str());

  delay(1000);
}