Two quick fixes for sending unicast I-Am - corrected name of handler, and added the destination copy.

bacnet-stack/demo/handler/s_iam.c

@@ -125,11 +125,15 @@ int iam_unicast_encode_pdu(
     int pdu_len = 0;
     BACNET_ADDRESS my_address;
 
+    /* The destination will be the same as the src, so copy it over. */
+    memcpy( dest, src, sizeof( BACNET_ADDRESS ) );
+    dest->net = 0;
+
     datalink_get_my_address(&my_address);
     /* encode the NPDU portion of the packet */
     npdu_encode_npdu_data(npdu_data, false, MESSAGE_PRIORITY_NORMAL);
     npdu_len =
-        npdu_encode_pdu(&buffer[0], src, &my_address,
+        npdu_encode_pdu(&buffer[0], dest, &my_address,
         npdu_data);
     /* encode the APDU portion of the packet */
     apdu_len =

bacnet-stack/include/handlers.h

@@ -59,7 +59,7 @@ extern "C" {
         uint16_t service_len,
         BACNET_ADDRESS * src);
 
-    void handler_who_is_whois(
+    void handler_who_is_unicast(
         uint8_t * service_request,
         uint16_t service_len,
         BACNET_ADDRESS * src);