#include <time.h>
#include<stdlib.h>
#include <WiFi.h>
#include "PubSubClient.h"
#include<ESP32Servo.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

char clientId[50];
int servoPin1=12;
Servo servo1;
int servoPin2=4;
Servo servo2;
int servoPin3=15;
Servo servo3;

WiFiClient espClient;
PubSubClient client(espClient);

int ledPin1=4;
int ledPin2=12;
int ledPin3=13;
int ledPin4=5;

Adafruit_SSD1306 display(128,64,&Wire,1);


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  servo1.attach(servoPin1,500,2400);
  servo2.attach(servoPin2,500,2400);
  servo3.attach(servoPin3,500,2400);
  if(display.begin(SSD1306_SWITCHCAPVCC,0X3C))
  {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  delay(2000);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  Serial.print("Connecting to...");
  WiFi.mode(WIFI_STA);
  WiFi.begin("Wokwi-Guest","",6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
  }
  client.setServer("broker.emqx.io",1883);
  client.setCallback(callback);
  pinMode(ledPin1, OUTPUT);  
    pinMode(ledPin2, OUTPUT);  
      pinMode(ledPin3, OUTPUT); 
         pinMode(ledPin4, OUTPUT);  
}
void mqttReconnect()
{
  while(!client.connected())
  {
    Serial.print("Attempting Mqtt Connection....");
    if(client.connect(clientId))
    {
      Serial.println("connected");
      client.subscribe("topicName/iot");
    }else
    {
      Serial.print("failed,rc=");
      Serial.print(client.state());
      Serial.println("try again in 5 seconds");
      delay(5000);
    }
    }
  }
}
void callback(char* topic,byte* message,unsigned int length)
{
  String stMessage;
  for(int i=0;i<length;i++)
  {
    Serial.print((char)message[i]);
    stMessage +=(char)message[i];
    }
    Serial.print("Message arrived on topic:");
    Serial.print(topic);
    Serial.print(".Message:");
    Serial.print(stMessage);
}
void loop() {
  
  delay(10);
  if(!client.connected());
  {
    mqttReconnect();
      } //
      client.loop();
}