//==================================================
#include <WiFi.h>
#include <WiFiClient.h>
#include <PubSubClient.h>

String wifiSSID = "Wokwi-GUEST";
String wifiPassword = "";
String mqttBroker = "test.mosquitto.org";
WiFiClient client;
PubSubClient mqtt(client);

void connectWifi();
void connect_mqtt();
void mqttReceivedMessage(char *topic, byte *msg, unsigned int msgLength);

String data_L1;

unsigned long interval = 100; 
unsigned long previousMillis = 0;
//==================================================


#define ldrPin 11
const float gama = 0.7;
const float rl10 = 50;

const int Lamp_Teras = 37;
const int Lamp_Rtamu = 36;
const int Lamp_Km = 35;
const int Lamp_Dapur = 34;
float kecerahan, resistansi, voltase;
int nilaiLDR;

//===============================================
void mqttReceivedMessage(char *topic, byte *msg, unsigned int msgLength)
{ 
  String perintah = "";
  Serial.print("Pesan Diterima dg Topik: ");
  Serial.println(topic);
  for (int i = 0; i < msgLength; i++)
    {
      // Serial.print(char(msg[i]));
      perintah += String(char(msg[i]));
    }
  if (String(topic) == "smart/home")
    { 
    Serial.println(perintah);
    if (perintah == "ON") 
      {
        digitalWrite(Lamp_Teras, 1);
        Serial.println("LED1-ON");
      }
    else if (perintah == "OFF") 
      {
        digitalWrite(Lamp_Teras, 0);
        Serial.println("LED1-OFF");
      }
    }
}
//================================================

void baca_sensor()
{
  nilaiLDR = analogRead(ldrPin);
  nilaiLDR = map(nilaiLDR, 4095, 0, 1024, 0); //mengubah nilai pembacaan sensor LDR dari nilai ADC arduino menjadi nilai ADC ESP32
  voltase = nilaiLDR / 1024.*5;
  resistansi = 2000 * voltase / (1-voltase/5);
  kecerahan = pow(rl10*1e3*pow(10,gama)/resistansi,(1/gama));
  
  Serial.print("Kecerahan = ");
  Serial.println(kecerahan);
}


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

  pinMode(Lamp_Teras, OUTPUT);
  pinMode(Lamp_Rtamu, OUTPUT);
  pinMode(Lamp_Km, OUTPUT);
  pinMode(Lamp_Dapur, OUTPUT);

//================================================
  connectWifi();
  mqtt.setServer(mqttBroker.c_str(), 1883);
//================================================
}

void loop()
 {
//================================================
 if (!mqtt.connected())
  {
  connect_mqtt();
  Serial.println("MQTT Connected");
  }
  mqtt.loop();

  unsigned long currentMillis = millis(); 
  if ((unsigned long)(currentMillis - previousMillis) >= interval) 
  {
   baca_sensor();
   previousMillis = millis();
  }
//================================================

  if(kecerahan >= 200)
  {
    digitalWrite(Lamp_Teras, HIGH);
  }
 else
  {
  digitalWrite(Lamp_Teras, LOW);
  }
 }


void connect_mqtt()
{
  while(!mqtt.connected())
  {
    Serial.println("Connecting MQTT...");
    if (mqtt.connect("Ilham")) 
     {
       mqtt.subscribe("smart/home");
     }
    }
}

void connectWifi()
 {
  Serial.println("Connecting To Wifi");
  WiFi.begin(wifiSSID.c_str(), wifiPassword.c_str());
  while (WiFi.status() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(500);
  }
  Serial.println("Wifi Connected");
  Serial.println(WiFi.SSID());
  Serial.println(WiFi.RSSI());
  Serial.println(WiFi.macAddress());
  Serial.println(WiFi.localIP());
  Serial.println(WiFi.gatewayIP());
  Serial.println(WiFi.dnsIP());
 }