Added function to return network interface.

Dependencies:   MQTTPacket FP

Dependents:   IBMIoTF-2

Revision:
62:92e2780c325a
Parent:
52:3f9919941b86
--- a/MQTTmbed.h	Fri Apr 12 17:22:00 2019 -0400
+++ b/MQTTmbed.h	Sun Dec 01 20:35:06 2019 -0400
@@ -19,7 +19,7 @@
     
     bool expired()
     {
-        return t.read_ms() >= interval_end_ms;
+        return t.read_ms() >= (int)interval_end_ms;
     }
     
     void countdown_ms(unsigned long ms)