change ntp library

libraries/NTPClient/examples/IsTimeSet/IsTimeSet.ino

@@ -0,0 +1,53 @@
+#include <NTPClient.h>
+// change next line to use with another board/shield
+#include <ESP8266WiFi.h>
+//#include <WiFi.h> // for WiFi shield
+//#include <WiFi101.h> // for WiFi 101 shield or MKR1000
+#include <WiFiUdp.h>
+
+const char *ssid     = "<SSID>";
+const char *password = "<PASSWORD>";
+
+WiFiUDP ntpUDP;
+// initialized to a time offset of 10 hours
+NTPClient timeClient(ntpUDP,"pool.ntp.org", 36000, 60000);
+//                           HH:MM:SS
+// timeClient initializes to 10:00:00 if it does not receive an NTP packet
+// before the 100ms timeout.
+// without isTimeSet() the LED would be switched on, although the time
+// was not yet set correctly.
+
+// blue LED on ESP-12F
+const int led = 2;
+const int hour = 10;
+const int minute = 0;
+
+void setup(){
+  Serial.begin(115200);
+
+  pinMode(led, OUTPUT);
+  // led is off when pin is high
+  digitalWrite(led, 1);
+
+  WiFi.begin(ssid, password);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay (500);
+    Serial.print (".");
+  }
+
+  timeClient.begin();
+}
+
+void loop() {
+  timeClient.update();
+
+  Serial.println(timeClient.getFormattedTime());
+  if(timeClient.isTimeSet()) {
+    if (hour == timeClient.getHours() && minute == timeClient.getMinutes()) {
+      digitalWrite(led, 0);
+    }
+  }
+
+  delay(1000);
+}