Fix debug message, add test sketch (#682)

core/MySensorsCore.cpp

@@ -145,9 +145,11 @@ void _begin(void) {
 		CORE_DEBUG(PSTR("MCO:BGN:STP\n"));	// setup callback
 		setup();
 	}
-
+#if defined(MY_SENSOR_NETWORK)
 	CORE_DEBUG(PSTR("MCO:BGN:INIT OK,TSP=%d\n"), isTransportReady());
-
+#else
+	CORE_DEBUG(PSTR("MCO:BGN:INIT OK,TSP=NA\n"));
+#endif
 	// reset wdt before handing over to loop
 	hwWatchdogReset();
 }

core/MySensorsCore.h

@@ -43,7 +43,7 @@
  * | | MCO  | BGN	| BFR											| Callback before()
  * | | MCO  | BGN	| MTR											| MY_TRANSPORT_RELAXED enabled
  * | | MCO  | BGN	| STP											| Callback setup()
- * | | MCO	| BGN	| INIT OK,TSP=%%d								| Core initialised, transport status (TSP), 1=initialised, 0=not initialised
+ * | | MCO	| BGN	| INIT OK,TSP=%%d								| Core initialised, transport status (TSP), 1=initialised, 0=not initialised, NA=not available
  * | | MCO	| BGN	| NODE UNLOCKED									| Node successfully unlocked (see signing chapter)
  * |!| MCO	| BGN	| TSP FAIL										| Transport initialization failed
  * | | MCO	| REG	| REQ											| Registration request