Published May 15, 2019 © LGPL

Internet Clock (NTP)

This project will help you to get time from Internet for IoT projects, without requiring any extra RTC hardware.

IntermediateFull instructions provided1 hour2,128

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board

Nokia 5110 LCD

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

10 Pc. Jumper Wire Kit, 5 cm Long

Breadboard, 170 Pin

Story

Working Video

n this tutorial, we will how to use Nokia LCD 5110, get NTP data from Internet and display it on LCD at specific coordinates. Let's have a short introduction to NTP.

Network Time Protocol (NTP) is a protocol used to synchronize computer clock times in a network.It belongs to and is one of the oldest parts of the TCP/IP protocol suite. Theterm NTP applies to both the protocol and the client-server programs that runon computers.

NTP, which was developed by David Mills at the University of Delaware in 1981, is designed to be highly fault-tolerant and scalable.

How does NTP work?

The NTP client initiates a time-request exchange with theNTP server. As a result of this exchange, the client is able to calculate thelink delay and its local offset, and adjust its local clock to match the clockat the server's computer. As a rule, six exchanges over a period of about fiveto 10 minutes are required to initially set the clock.

Once synchronized, the client updates the clock about once every 10 minutes, usually requiring only a single message exchange. In addition to client-server synchronization. This transaction occurs via the User Datagram Protocol on port 123. NTP also supports broadcast synchronization of peer computer clocks.

Procedure:

We are going to display time and data to Nokia 5110 LCD, first you need to get familiar with Nokia 5110 LCD, you can use any other output method by making some changes in code.

Nokia 5110 LCD:

he Nokia 5110 is a basic graphic LCD screen for lots of applications. It was originally intended for as a cell phone screen. This one is mounted on an easy to solder PCB. It uses the PCD8544 controller, which isthe same used in the Nokia 3310 LCD. The PCD8544 is a low power CMOS LCD controller/driver, designed to drive a graphic display of 48 rows and 84 columns. All necessary functions for the display are provided in a single chip, including on-chip generation of LCD supply and bias voltages, resulting in aminimum of external components and low power consumption. The PCD8544 interfaces to micro-controllers through a serial bus interface.

Pinout:

Hardware connections:

Use the following fritzing diagram to make connections:

Nokia LCD pins NodeMCUpins

RST................................ D1

CE..................................D2

DC................................ D0

Din................................D7

CLK...............................D5

VCC..............................3V pin of NodeMCU or use external 3.3v supply

BL.................................Common it with VCC pin to turn ON backlight (you can add a

variable resistor to adjust backlight)

GND.............................GND

Program your NodeMCU:

Make sure you have esp8266 boards in your Arduino IDE

Then Set your local wifi SSID & Password and GMT according to your area in code, then upload it in your controller. Initially it will show wrong data until it established connection to internet, wait for few seconds for updated time and date, check the attached video with this tutorial.

Regard:

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To show some support: paypal.me/nextlifetech

Schematics

Code

Program

//hammadiqbal12@gmail.com


#include <Time.h>
#include <TimeLib.h>
#include <NTPClient.h>
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>

const char *ssid     = "";
const char *password = "";

const int8_t RST_PIN = D1;
const int8_t CE_PIN = D2;
const int8_t DC_PIN = D0;
Adafruit_PCD8544 display = Adafruit_PCD8544(DC_PIN, CE_PIN, RST_PIN);
int GMT = 5;
int DAY, MONTH, YEAR, Seconds, Hours;
long int time_now;
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP);

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

  WiFi.begin(ssid, password);

  display.begin();
  display.setContrast(40);              // Adjust for your display

  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(BLACK);
  display.setCursor(0, 0);
  display.println("Unicorn");
  display.setCursor(0, 20);
  display.println("Devices");
  display.display();
  delay(2000);
  display.clearDisplay();

  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
  }

  timeClient.begin();
}

void loop() {
  timeClient.update();
  time_now = timeClient.getEpochTime() + (GMT * 3600);                            //get epoch time and adjust it according to your GMT
  DAY = day(time_now);
  MONTH = month(time_now);
  YEAR = year(time_now);
  Hours = hourFormat12(time_now);
  Seconds = second(time_now);

  LCD_DISPLAY(String(DAY), String(MONTH), String(YEAR));
  display.display();

  delay(1000);

}

void LCD_DISPLAY(String DAY, String MONTH, String YEAR)
{
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(BLACK);
  display.setCursor(0, 5);
  if (Hours > 9)
    display.println(String(Hours) + ":" + timeClient.getMinutes());
  if (Hours < 10)
    display.println("0" + String(Hours) + ":" + timeClient.getMinutes());

  display.setTextSize(1);
  display.setTextColor(BLACK);
  display.setCursor(65, 5);
  display.println(String(Seconds));

  display.setTextSize(1);
  display.setTextColor(BLACK);
  display.setCursor(65, 14);
  if (isPM(time_now))
    display.println("PM");
  if (isAM(time_now))
    display.println("AM");


  display.setTextSize(1);
  display.setTextColor(BLACK);
  display.setCursor(15, 35);
  display.println(DAY + ":" + MONTH + ":" + YEAR);

}

Credits

Hammad Iqbal

6 projects • 43 followers

I'm an Electrical Engineer and here I'm to share my knowledge about Embedded system.

Contact

Comments

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Internet Clock (NTP)

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

How does NTP work?

Procedure:

Pinout:

Hardware connections:

Program your NodeMCU:

Custom parts and enclosures

NTP library

Time Library

Schematics

Circuit Diagram

Code

Program

Credits

Hammad Iqbal

Comments

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Internet Clock (NTP)

Internet Clock (NTP)

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

How does NTP work?

Procedure:

Pinout:

Hardware connections:

Program your NodeMCU:

Custom parts and enclosures

NTP library

Time Library

Schematics

Circuit Diagram

Code

Program

Credits

Hammad Iqbal

Comments

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