NTPClient demo using ESP8266 driver library built in function. Original code from Jack Berkhout that works very fast, may depend on users connection, however I get the time back and RTC set within 200mS.

Dependencies:   mbed ESP8266-OS2

Revision:
1:b7cce2519e5e
Parent:
0:c284c33c96f1
--- a/ESP8266.lib	Thu Feb 14 00:26:04 2019 +0000
+++ b/ESP8266.lib	Thu Feb 14 00:40:25 2019 +0000
@@ -1,1 +1,1 @@
-https://os.mbed.com/users/star297/code/ESP8266/#ffdde9d17dd1
+https://os.mbed.com/users/star297/code/ESP8266-OS2/#ffdde9d17dd1