Use IP address for NTP lookup when using MKR NB 1500 since these is usually no DNS available when using NB-IoT

Author: aentinger

src/utility/time/NTPUtils.cpp

@@ -77,8 +77,12 @@ void NTPUtils::sendNTPpacket(UDP & udp)
   ntp_packet_buf[13] = 0x4E;
   ntp_packet_buf[14] = 49;
   ntp_packet_buf[15] = 52;
-  
+
+#ifdef ARDUINO_SAMD_MKRNB1500
+  udp.beginPacket(NTP_TIME_SERVER_IP_1, NTP_TIME_SERVER_PORT);
+#else
   udp.beginPacket(NTP_TIME_SERVER, NTP_TIME_SERVER_PORT);
+#endif
   udp.write(ntp_packet_buf, NTP_PACKET_SIZE);
   udp.endPacket();
 }

src/utility/time/NTPUtils.h

@@ -32,6 +32,13 @@
 
 #include <Udp.h>
 
+/**************************************************************************************
+ * CONSTANTS
+ **************************************************************************************/
+
+static IPAddress const NTP_TIME_SERVER_IP_1(35,204,74,237);
+static IPAddress const NTP_TIME_SERVER_IP_2(34,73,181,129);
+
 /**************************************************************************************
  * CLASS DECLARATION
  **************************************************************************************/