Index: leahi_dialin/dd/dialysate_delivery.py
===================================================================
diff -u -rf66c019100e98b49cd94fa0a69951a1a7c952da0 -ref2941249089bf9eeb6f771112ce13a4a1f39a36
--- leahi_dialin/dd/dialysate_delivery.py	(.../dialysate_delivery.py)	(revision f66c019100e98b49cd94fa0a69951a1a7c952da0)
+++ leahi_dialin/dd/dialysate_delivery.py	(.../dialysate_delivery.py)	(revision ef2941249089bf9eeb6f771112ce13a4a1f39a36)
@@ -100,6 +100,16 @@
             self.can_interface.register_receiving_publication_function(channel_id,
                                                                        self.msg_id_dd_debug_event,
                                                                        self._handler_dd_debug_event_sync)
+            # For current builds and setups without UI, there are no CAN messages sent on the bus to let the
+            # subsystems know there are other nodes and start publishing. Dialin will send a plain ACK to the CANbus over
+            # the dd channel to start publishing.
+            message = DenaliMessage.build_message(
+                channel_id=DenaliChannels.dialin_to_dd_ch_id,
+                message_id=MsgIds.MSG_ID_ACK_MESSAGE_THAT_REQUIRES_ACK.value,
+                payload=bytearray(),
+                seq=0)
+            if message is not None:
+                self.can_interface.send(message, 0, is_ack=True)
 
         # create properties
         self.dd_op_mode_timestamp = 0.0