Index: leahi_dialin/dd/dialysate_delivery.py
===================================================================
diff -u -rc5bfcf84ed942ca5841bf9de155aa0f495b4d28d -r2c75906db45abe54063d9dfca8ec99118418f9a2
--- leahi_dialin/dd/dialysate_delivery.py	(.../dialysate_delivery.py)	(revision c5bfcf84ed942ca5841bf9de155aa0f495b4d28d)
+++ leahi_dialin/dd/dialysate_delivery.py	(.../dialysate_delivery.py)	(revision 2c75906db45abe54063d9dfca8ec99118418f9a2)
@@ -99,6 +99,16 @@
             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 TD & UI, there is 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
Index: leahi_dialin/fp/filtration_purification.py
===================================================================
diff -u -rc5bfcf84ed942ca5841bf9de155aa0f495b4d28d -r2c75906db45abe54063d9dfca8ec99118418f9a2
--- leahi_dialin/fp/filtration_purification.py	(.../filtration_purification.py)	(revision c5bfcf84ed942ca5841bf9de155aa0f495b4d28d)
+++ leahi_dialin/fp/filtration_purification.py	(.../filtration_purification.py)	(revision 2c75906db45abe54063d9dfca8ec99118418f9a2)
@@ -93,6 +93,16 @@
             self.can_interface.register_receiving_publication_function(channel_id,
                                                                        MsgIds.MSG_ID_FP_DEF_STATUS_RESPONSE.value,
                                                                        self._handler_fp_defeatured_response)
+            # For current builds and setups without TD & UI, there is 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.fp_defeatured_timestamp = 0.0