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libraries/NTP/examples/WIFI_NTP/WIFI_NTP.ino

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+// example for WIFI based boards like ESP8266, ESP32, Nano RP2040 Connect, WiFi 101 shield or MKR1000
+
+#include "Arduino.h"
+// change next line to use with another board/shield
+//#include <ESP8266WiFi.h>
+//#include <WiFi.h> // for WiFi shield or ESP32
+//#include <WiFi101.h> // for WiFi 101 shield or MKR1000
+#include <WiFiNINA.h> // for e.g. Nano RP2040 Connect
+//#include "WiFiUdp.h" // not needed for WiFiNINA
+#include "NTP.h"
+
+char ssid[]     = "yourSSID";
+char password[] = "yourPASSWORD";
+
+WiFiUDP wifiUdp;
+NTP ntp(wifiUdp);
+
+void setup() {
+  Serial.begin(9600);
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    Serial.println("Connecting ...");
+    delay(500);
+    }
+  Serial.println("Connected");  
+  ntp.ruleDST("CEST", Last, Sun, Mar, 2, 120); // last sunday in march 2:00, timetone +120min (+1 GMT + 1h summertime offset)
+  ntp.ruleSTD("CET", Last, Sun, Oct, 3, 60); // last sunday in october 3:00, timezone +60min (+1 GMT)
+  ntp.begin();
+  Serial.println("start NTP");
+  }
+
+void loop() {
+  ntp.update();
+  Serial.println(ntp.formattedTime("%d. %B %Y")); // dd. Mmm yyyy
+  Serial.println(ntp.formattedTime("%A %T")); // Www hh:mm:ss
+  delay(1000);
+  }