ST / Mbed 2 deprecated TLS_HelloWorld_IDW01M1

Connect a secure socket with TLS server authentication through X-NUCLEO_IDW01M1 Wi-Fi.

Dependencies:   NetworkSocketAPI X_NUCLEO_IDW01M1v2 mbed

Fork of HelloWorld_IDW01M1v2 by ST

Example of TLS connection using X-NUCLEO-IDW01M1 Wi-Fi expansion board.
The application is meant to be used with mbed OS 2 ("Classic") only (no mbedOS 5 support).
It uses the TLS/SSL feature provided natively by the Wi-Fi module and performs secure connection to https://mbed.org also verifying the server identity.
To avoid expired CA certificates, system time (in epoch) must be manually entered (e..g. using http://www.epochconverter.com/ ) .
Retrieval of current time from an NTP server is shown by this example.

Diff: main.cpp

Revision:
4:40cb51547b9f
Parent:
2:3a87dbea07a7
Child:
6:196de97a7195
diff -r ae403a4ae833 -r 40cb51547b9f main.cpp
--- a/main.cpp	Wed Sep 07 09:01:47 2016 +0000
+++ b/main.cpp	Wed Sep 07 11:13:06 2016 +0000
@@ -78,7 +78,7 @@
     SocketAddress addr(&spwf, "st.com");   
     pc.printf("\r\nst.com resolved to: %s\r\n", addr.get_ip_address());    
 
-    pc.printf("\r\nconnecting to http://time-d.nist.gov\r\n");
+    pc.printf("\r\nconnecting to http://4.ifcfg.me\r\n");
     
     TCPSocket socket(&spwf);
     err = socket.connect("4.ifcfg.me", 23);