20210712_ntp

#include <NTPClient.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <WiFiUdp.h>
#include <ESP8266WebServer.h>   // Include the WebServer library

ESP8266WiFiMulti wifiMulti;      // Create an instance of the ESP8266WiFiMulti class, called 'wifiMulti'

WiFiUDP ntpUDP;                  // Create an instance of the WiFiUDP class to send and receive

// You can specify the time server pool and the offset, (in seconds)
// additionaly you can specify the update interval (in milliseconds).
NTPClient timeClient(ntpUDP, "se.pool.ntp.org", 0, 60000);

void setup()
{
  Serial.begin(115200);          // Start the Serial communication to send messages to the computer
  delay(10);
  Serial.println("\r\n");

  startWiFi();                   // Try to connect to some given access points. Then wait for a connection

  timeClient.begin();
}

char buffer[200];

void loop()
{
  timeClient.update();

  uint32_t actualTime = timeClient.getEpochTime();
}

void startWiFi()
{ // Try to connect to some given access points. Then wait for a connection

  wifiMulti.addAP("*******", "********");   // add Wi-Fi networks you want to connect to

  Serial.println("Connecting");
  while (wifiMulti.run() != WL_CONNECTED)
  {  // Wait for the Wi-Fi to connect
    delay(250);
    Serial.print('.');
  }
  Serial.println("\r\n");
  Serial.print("Connected to ");
  Serial.println(WiFi.SSID());             // Tell us what network we're connected to
  Serial.print("IP address:\t");
  Serial.print(WiFi.localIP());            // Send the IP address of the ESP8266 to the computer
  Serial.println("\r\n");
}