example_ntp.cpp

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#include <Arduino.h>
#include <NTPClient.h>
#include <WiFi.h>
 
#define SERIAL_BAUD 115200
 
const char ssid[] = "Enter-Your-SSID";
const char pass[] = "Enter-Your-Password";
 
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP);
 
String currentTime;
 
void setup() {
  // Start serial interface
  Serial.begin(115200);
  // Wait for serial connection
  while (!Serial) {
    delay(100);
  }
 
  Serial.print("SSID: ");
  Serial.println(ssid);
  Serial.print("Password: ");
  Serial.println(pass);
  Serial.print("Connecting");
 
  // Connect to WiFi network
  WiFi.begin(ssid, pass);
 
  // Wait for WiFi to connect
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("Connected!");
  Serial.println(WiFi.localIP());
 
  timeClient.begin();
  // Set time offset in seconds
  // GMT = 0
  // California: PST (GMT -7 hours) = -25200
  // Georgia: EST (GMT -4 hours) = -14400
  // Illinois: CDT (GMT -5 hours) = -18000
  timeClient.setTimeOffset(-28800);
}
 
void loop() {
  // Prints time in HH:MM:SS format
  while (!timeClient.update()) {
    timeClient.forceUpdate();
  }
  currentTime = timeClient.getFormattedTime();
  Serial.print("The time is: ");
  Serial.println(currentTime);
 
  // Wait 1 second
  delay(1000);
}