Index: dialin/protocols/CAN.py
===================================================================
diff -u -r9ae90e7b14dc11b1f6fa631caecc75d68d7f68e8 -rab51b17355d6fcd68817af7a1134e2b397809cfa
--- dialin/protocols/CAN.py	(.../CAN.py)	(revision 9ae90e7b14dc11b1f6fa631caecc75d68d7f68e8)
+++ dialin/protocols/CAN.py	(.../CAN.py)	(revision ab51b17355d6fcd68817af7a1134e2b397809cfa)
@@ -21,6 +21,7 @@
 import can
 import math
 from time import sleep
+from datetime import datetime
 import sys
 from logging import Logger
 import struct
@@ -784,6 +785,7 @@
         :return: None
         """
         print(
+            datetime.now().time(),
             " "  # can id 
             f"{(complete_dialin_message['channel_id']):0{3}X}"
             " "  # head tag
Index: dialin/ui/hd_simulator.py
===================================================================
diff -u -raf9e093318463eb6111bca2c925ffaad4f5b2773 -rab51b17355d6fcd68817af7a1134e2b397809cfa
--- dialin/ui/hd_simulator.py	(.../hd_simulator.py)	(revision af9e093318463eb6111bca2c925ffaad4f5b2773)
+++ dialin/ui/hd_simulator.py	(.../hd_simulator.py)	(revision ab51b17355d6fcd68817af7a1134e2b397809cfa)
@@ -45,7 +45,7 @@
         """
         super().__init__()
         HDSimulator.instance_count = HDSimulator.instance_count + 1
-
+        self.checked_in = False
         self._log_manager = _LogManager(log_level=log_level, log_filepath=self.__class__.__name__ + ".log")
         self.logger = self._log_manager.logger
         self.console_out = console_out
@@ -61,6 +61,9 @@
 
             if auto_response:
                 self.can_interface.register_receiving_publication_function(channel_id,
+                                                                           MsgIds.MSG_ID_UI_CHECK_IN.value,
+                                                                           self._handler_ui_first_check_in)
+                self.can_interface.register_receiving_publication_function(channel_id,
                                                                            MsgIds.MSG_ID_UI_INITIATE_TREATMENT_REQUEST.value,
                                                                            self._handler_ui_initiate_treatment)
                 self.can_interface.register_receiving_publication_function(channel_id,
@@ -291,6 +294,23 @@
 
         self.cmd_send_uf_treatment_response(1, 0, uf_volume)
 
+    def _handler_ui_first_check_in(self, message)->None:
+        """
+        Handler function to first check in to start the post
+        @param message: the check-in message
+        @return: None
+        """
+        if self.checked_in:
+            return
+
+        print("_handler_ui_first_check_in")
+        for i in range(20):
+            self.cmd_send_hd_post(i, True, False)
+            sleep(0.1)
+        self.cmd_send_hd_post(0, True, True)
+        self.cmd_send_hd_operation_mode(3, 0)
+        self.checked_in = True
+
     def _handler_ui_initiate_treatment(self, message):
         """
         Handler function to start a treatment