Published August 15, 2020

How to get current time using IOT

In this project we will design an Internet Clock using ESP8266 Node-MCU. I will fetch the time and date from the internet using the ESP8266

BeginnerFull instructions provided1,811

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board

UTSOURCE Electronic Parts

Adafruit RGB Backlight LCD - 16x2

Jumper wires (generic)

Software apps and online services

Arduino IDE

Story

In this project we will design an Internet Clock using ESP8266 Node-MCU. I will fetch the time and date from the internet using the ESP8266 controller. The internet time clock has a precision of 0.02 to 0.10 seconds. There are some RTC Module like DS1307, DS3231 or PCF8563 to get the time. But what if there is no availability of any RTC Module. The next disadvantage of RTC Module is the poor accuracy as it requires manual adjustments over and over again to keep time/date synchronized. The solution here is to use the Network Time Protocol (NTP). If your ESP32 project has access to the Internet, you can get date and time (with precision within a few milliseconds of UTC) for FREE.

watch the tutorial from YouTube

Vist my website for more projects

click here for circuit

Thanks UTSOURCE.net to offer electronic components for my projects

NTP

The NTP client initiates a time-request exchange with the NTP server. As a result of this exchange, the client is able to calculate the link delay and its local offset and adjust its local clock to match the clock at the server’s computer.

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.

Download the libraries here

Code

code

//for more projects visit www.blackkeyhole.com
//modified Ashshak Sharifdeen
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include <NTPClient.h>               
#include <TimeLib.h>                 
#include <LiquidCrystal.h>
 
const int RS = D3, EN = D4, d4 = D5, d5 = D6, d6 = D7, d7 = D8;   
LiquidCrystal lcd(RS, EN, d4, d5, d6, d7); 
 
 
const char *ssid     = "ZTE WIFI";
const char *password = "kl2229834";
 
WiFiUDP ntpUDP;
 
 //srilankan time zone
 //+5 hr 30 Mins = 5x60x60 + 3060 = 19800
NTPClient timeClient(ntpUDP, "asia.pool.ntp.org", 19800, 60000);
 
char Time[ ] = "TIME:00:00:00";
char Date[ ] = "DATE:00/00/2000";
byte last_second, second_, minute_, hour_, day_, month_;
int year_;
 
 
 
void setup() {
 
  Serial.begin(115200);
  lcd.begin(16,2);                 // Initialize I2C LCD module (SDA = GPIO21, SCL = GPIO22)                  
  lcd.setCursor(0, 0);
  lcd.print(Time);
  lcd.setCursor(0, 1);
  lcd.print(Date);
 
  WiFi.begin(ssid, password);
  Serial.print("Connecting.");
 
  while ( WiFi.status() != WL_CONNECTED ) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("connected");
  timeClient.begin();
}
 
 
void loop() {
 
  timeClient.update();
  unsigned long unix_epoch = timeClient.getEpochTime();    // Get Unix epoch time from the NTP server
 
  second_ = second(unix_epoch);
  if (last_second != second_) {
 
 
    minute_ = minute(unix_epoch);
    hour_   = hour(unix_epoch);
    day_    = day(unix_epoch);
    month_  = month(unix_epoch);
    year_   = year(unix_epoch);
 
 
 
    Time[12] = second_ % 10 + 48;
    Time[11] = second_ / 10 + 48;
    Time[9]  = minute_ % 10 + 48;
    Time[8]  = minute_ / 10 + 48;
    Time[6]  = hour_   % 10 + 48;
    Time[5]  = hour_   / 10 + 48;
 
 
 
    Date[5]  = day_   / 10 + 48;
    Date[6]  = day_   % 10 + 48;
    Date[8]  = month_  / 10 + 48;
    Date[9]  = month_  % 10 + 48;
    Date[13] = (year_   / 10) % 10 + 48;
    Date[14] = year_   % 10 % 10 + 48;
 
    Serial.println(Time);
    Serial.println(Date);
 
    lcd.setCursor(0, 0);
    lcd.print(Time);
    lcd.setCursor(0, 1);
    lcd.print(Date);
    last_second = second_;
 
  }
  delay(500);
}