// Hobby Projects
// NodemcuNtpPropAnaClock041019A.ino
#include <NTPClient.h>
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
const char *ssid     = "Your Router SSID Name";
const char *password = "Your_Router_Password";
const long utcOffsetInSeconds = 19800;    // Calculating Time with Time Zones:  https://docstore.mik.ua/orelly/webprog/pcook/ch03_12.htm
int LED1 = D0;
int LED2 = D1;
int LED3 = D2;
int LED4 = D3;
int LED5 = D4;
int LED6 = D5;
int LED7 = D6;
int LED8 = D8;
int sensorPin = D7; 
byte hours = 12;
byte minutes = 15;
byte seconds = 30;
byte hours_analog;
byte Day;
byte z = 0;
unsigned int n,dl,propeller_posn;
unsigned long tc,to,previousTime = 0;
int val;

WiFiUDP ntpUDP;

NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds, 300000);
void setup(){
  pinMode(LED1,OUTPUT);  
  pinMode(LED2,OUTPUT);  
  pinMode(LED3,OUTPUT);  
  pinMode(LED4,OUTPUT);  
  pinMode(LED5,OUTPUT);  
  pinMode(LED6,OUTPUT);  
  pinMode(LED7,OUTPUT);  
  pinMode(LED8,OUTPUT); 

  digitalWrite(LED1,HIGH);   
 
  pinMode(sensorPin,INPUT_PULLUP);   
  
  if(hours > 11)
  hours_analog = hours - 12;  
  else
  hours_analog = hours;
  
  Serial.begin(9600);
  
  WiFi.begin(ssid, password);

  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
  digitalWrite(LED2,HIGH);
  delay(250);
  digitalWrite(LED2,LOW);
  delay(250);      
  }

  timeClient.begin();

  update_time(); 
  Serial.println(timeClient.getFormattedTime());
  
  attachInterrupt(digitalPinToInterrupt(sensorPin),usdl,FALLING);     
}

void loop()
{
 if(z == 0)
 {
    val = digitalRead(sensorPin);
   if(val == LOW)
  {
  z = 1;
  update_time();
  propeller_posn=45;
  n=0;
  
  while(n < 60)
  {
      
  drawMinuteMarker();

  if ((propeller_posn==0) || (propeller_posn==5) || (propeller_posn==10) || (propeller_posn==15) || (propeller_posn==20) || (propeller_posn==25) || (propeller_posn==30) || (propeller_posn==35) || (propeller_posn==40) || (propeller_posn==45) || (propeller_posn==50) || (propeller_posn==55))
  drawHourMarker();
  
  if ((propeller_posn==0) || (propeller_posn==15) || (propeller_posn==30) || (propeller_posn==45))
  drawQuarterMarker(); 

  if(propeller_posn == hours_analog*5 - 1)
  digitalWrite(LED2,HIGH);
  
  if((propeller_posn == hours_analog*5) || (( propeller_posn == 0 ) && (hours_analog == 0)))
  drawHoursHand();

  if(propeller_posn == hours_analog*5 + 1)
  digitalWrite(LED2,HIGH);
  if((propeller_posn == 59) && (hours_analog*5 == 0))
  digitalWrite(LED2,HIGH); 
  if(propeller_posn == minutes-1)
  digitalWrite(LED3,HIGH);  
  
  if(propeller_posn == minutes)
  drawMinutesHand();

  if(propeller_posn == minutes+1)
  digitalWrite(LED3,HIGH); 
  if((propeller_posn == 0) && (minutes == 59))
  digitalWrite(LED3,HIGH); 
  if((propeller_posn == 59) && (minutes == 0))
  digitalWrite(LED3,HIGH); 
  if(propeller_posn == seconds-1)
  digitalWrite(LED4,HIGH);      
  
  if(propeller_posn == seconds)
  drawSecondsHand();

  if(propeller_posn == seconds+1)
  digitalWrite(LED4,HIGH);
  if((propeller_posn == 0) && (seconds == 59))
  digitalWrite(LED4,HIGH);
  if((propeller_posn == 59) && (seconds == 0))
  digitalWrite(LED4,HIGH); 
  
  delayMicroseconds(dl);
  
  displayClear(); 

  if(propeller_posn != 44)
  //delayMicroseconds(dl/5);
  //else 
  delayMicroseconds(dl*4);
  
  n++;
  propeller_posn++;
  if(propeller_posn == 60)
  propeller_posn=0;
  }  
  }
 }
   
 if(z == 1)
 {
  val = digitalRead(sensorPin); 
    if(val == HIGH)
  {
    z = 0;
  }
 }  
}

void displayClear()
  {
  digitalWrite(LED1,HIGH);
  digitalWrite(LED2,LOW);
  digitalWrite(LED3,LOW);
  digitalWrite(LED4,LOW);
  digitalWrite(LED5,LOW);
  digitalWrite(LED6,LOW);
  digitalWrite(LED7,LOW);
  digitalWrite(LED8,LOW);
  }

  void drawMinuteMarker()
  {
  digitalWrite(LED8,HIGH);
  }

  void drawHourMarker()
  {
  digitalWrite(LED7,HIGH); 
  }

  void drawQuarterMarker()
  {
  digitalWrite(LED6,HIGH); 
  }

  void drawHoursHand()
  {
  digitalWrite(LED1,LOW);
  digitalWrite(LED2,HIGH);
  digitalWrite(LED3,HIGH);
  }

  void drawMinutesHand()
  { 
  digitalWrite(LED1,LOW);
  digitalWrite(LED2,HIGH);
  digitalWrite(LED3,HIGH);
  digitalWrite(LED4,HIGH);
  }

  void drawSecondsHand()
  { 
  digitalWrite(LED1,LOW);
  digitalWrite(LED2,HIGH);
  digitalWrite(LED3,HIGH);
  digitalWrite(LED4,HIGH);
  digitalWrite(LED5,HIGH);
  }  

void update_time()
    {
    timeClient.update();    
    Day = timeClient.getDay();
    hours=timeClient.getHours();
    if(hours > 11)
    hours_analog = hours - 12;
    else
    hours_analog = hours;      
    minutes=(timeClient.getMinutes());
    seconds=(timeClient.getSeconds());
    }

   void usdl()
{   
  tc = micros()-to;
  to = micros(); 
  dl = tc/307;      
}