Added DeviceCommunicationControl in the demos and into the stack.

bacnet-stack/demo/handler/s_wp.c

@@ -36,6 +36,7 @@
 #include "apdu.h"
 #include "device.h"
 #include "datalink.h"
+#include "dcc.h"
 #include "whois.h"
 /* some demo stuff needed */
 #include "handlers.h"
@@ -60,6 +61,9 @@ uint8_t Send_Write_Property_Request(
   int bytes_sent = 0;
   BACNET_WRITE_PROPERTY_DATA data;
 
+  if (!dcc_communication_enabled())
+    return 0;
+
   /* is the device bound? */
   status = address_get_by_device(device_id, &max_apdu, &dest);
   /* is there a tsm available? */