// code for controlling servo motor using nodered dashboard

#include <WiFi.h>
#include <PubSubClient.h>
#include <ESP32Servo.h> 
#include <DHTesp.h>
#include <LiquidCrystal_I2C.h>  
#include <RTClib.h> 
#include <Wire.h>   

#define SERIAL_OPTION 0 

LiquidCrystal_I2C lcd(0x27,16,2); 
RTC_DS1307 RTC;

Servo myservo;// servo onject 
DHTesp dht; 
const char* ssid = "Wokwi-GUEST";
const char* password = "";
 
/*MQTT Broker*/
const char mqtt_server[] = "broker.hivemq.com";
const char mqtt_username[] = "MQTT_BIRD";
const char mqtt_password[] = "UfmY_J2d@l9B";

const char mqtt_client_id[] = "ESP32_Client";
const int  mqtt_port = 1883;

/*Topics to Publish and Subscribe*/
const char publish_topic_temp[]  = "esp32/phone/temp";
const char publish_topic_hum[]  = "esp32/phone/hum";
const char subscribe_topic[] = "esp32/device";


WiFiClient espClient;
PubSubClient client(espClient);
unsigned long lastMsg = 0;
char msg[50];

char targetTime[7] = "0:0";
char currentTime[5] ;
char serv_val[5] = "0";

#define LED 2
int value = 0;
void setup() {
  lcd.init();   
  lcd.backlight();  

  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);

  RTC.begin();  
  Serial.begin(115200);
   myservo.attach(5);
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
  dht.setup(15, DHTesp::DHT22);
}
void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}
void callback(char* topic, byte* payload, unsigned int length) {
   String message;
   String prefix;
  Serial.print("Message arrived [");
  Serial.print(topic);
  Serial.print("] ");
  for (int i = 0; i < length; i++) {
     message+=((char)payload[i]);  
  }
    Serial.print(message);
  
  prefix = message.substring(0,String(message).indexOf(":"));

  if (prefix == "t")
  {
    message.remove(0,prefix.length()+1);
    Serial.println("");
    sprintf(targetTime,"%s",message);
    Serial.println(targetTime);
    Serial.println("Time Sent.");
  }
  else if (prefix == "s")
  {
    message.remove(0,prefix.length()+1);
    Serial.println("");
    sprintf(targetTime,"%s",message);
    Serial.println(targetTime);
    Serial.println("Command Sent.");
  }
  else if (prefix == "SM")
  {
    message.remove(0,prefix.length()+1);
    Serial.println("");
    sprintf(serv_val,"%s",message);
    Serial.println(serv_val);
    Serial.println("Servo Sent.");
  }

// if (topic ="/EME/Servo")  /// esp32 subscribe topic //0,50,100   
//     Serial.print(" ");
//    int status = serv_val.toInt();   
//    int pos = map(status, 1, 100, 0, 180);//100
//    Serial.println(pos);
//     myservo.write(pos);
//     delay(15);  
 }
void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ESPClient")) {
      Serial.println("connected");
      client.subscribe(subscribe_topic);
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds"); 
      delay(5000);
   }}}
void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop(); 
  if (millis() - lastMsg > 2000) 
  { //perintah publish data
    TempAndHumidity  data = dht.getTempAndHumidity();
    String temp = String(data.temperature, 2);
    client.publish(publish_topic_temp, temp.c_str()); // publish temp topic /ThinkIOT/temp
    String hum = String(data.humidity, 1); 
    client.publish(publish_topic_hum, hum.c_str());   // publish hum topic /ThinkIOT/hum

    Serial.print("Temperature: ");
    Serial.println(temp);
    Serial.print("Humidity: ");
    Serial.println(hum);
    lastMsg = millis();
  }

   DateTime now=RTC.now();
   sprintf(currentTime, "%d:%d",now.hour(),now.minute());
  if (SERIAL_OPTION) {
    Serial.print(now.year()); Serial.print("/");
    Serial.print(now.month()); Serial.print("/");
    Serial.print(now.day()); Serial.print(" ");

    Serial.print(now.hour()); Serial.print(":");
    Serial.print(now.minute()); Serial.print(":");
    Serial.print(now.second()); Serial.print("\n");
  }
  
  lcd.setCursor(0,0); lcd.print("DATE: ");
  lcd.print(now.year()); lcd.print("/"); lcd.print(now.month()); lcd.print("/"); lcd.print(now.day());
  lcd.setCursor(0,1); lcd.print("TIME: ");
  lcd.print(now.hour()); lcd.print(":"); lcd.print(now.minute()); lcd.print(":"); lcd.print(now.second());

  if (String(targetTime) == currentTime)
  {
    digitalWrite(LED, HIGH);
    myservo.write(120);
    delay(2000);
    myservo.write(0);
    digitalWrite(LED, LOW);
    sprintf(targetTime,"%s","00:00");
  }
  else if(String(targetTime) == "1")
  {
    digitalWrite(LED, HIGH);
  }
  else
  {
    digitalWrite(LED, LOW);
  }

  // int status = serv_val.toInt();   
  // int pos = map(status, 1, 100, 0, 180);//100
  // Serial.println(pos);
  // myservo.write(pos);

  delay(100);
}