Index: leahi_dialin/fp/filtration_purification.py
===================================================================
diff -u -rbd5420b3540747a01b3d4d6dd40146eab527e0d1 -r18f767a4c701bf22d074eda6cafe3dfd98906585
--- leahi_dialin/fp/filtration_purification.py	(.../filtration_purification.py)	(revision bd5420b3540747a01b3d4d6dd40146eab527e0d1)
+++ leahi_dialin/fp/filtration_purification.py	(.../filtration_purification.py)	(revision 18f767a4c701bf22d074eda6cafe3dfd98906585)
@@ -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 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_fp_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 = False
@@ -245,24 +255,17 @@
 
         @return: 1 if successful, zero otherwise
         """
+        return cmd_generic_override(
+            payload = None,
+            reset = NO_RESET,
+            channel_id = DenaliChannels.dialin_to_fp_ch_id,
+            msg_id = MsgIds.MSG_ID_FP_DEF_STATUS_REQUEST,
+            entity_name = 'FP Defeatured Status',
+            override_text = '',
+            logger = self.logger,
+            can_interface = self.can_interface)
 
-        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_fp_ch_id,
-                                              message_id=MsgIds.MSG_ID_FP_DEF_STATUS_REQUEST.value)
 
-        self.logger.debug('Getting FP defeatured status')
-        received_message = self.can_interface.send(message)
-
-        # If there is content...
-        if received_message is not None:
-            self.logger.debug("Received FW ACK after requesting FP defeatured configuration record.")
-            # response payload is OK or not OK
-            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
-        else:
-            self.logger.debug("Timeout!!!!")
-            return False
-
-
-
     def cmd_op_mode_broadcast_interval_override(self, ms: int, reset: int = NO_RESET) -> int:
         """
         Constructs and sends the measured op mode broadcast interval override command