Index: dialin/hd/hemodialysis_device.py
===================================================================
diff -u -r1d0f0c1edb80ffa492f076bd5ead0729a64e17b1 -rc8e6fd14aaca687134279ab51a07cdf431b8837c
--- dialin/hd/hemodialysis_device.py	(.../hemodialysis_device.py)	(revision 1d0f0c1edb80ffa492f076bd5ead0729a64e17b1)
+++ dialin/hd/hemodialysis_device.py	(.../hemodialysis_device.py)	(revision c8e6fd14aaca687134279ab51a07cdf431b8837c)
@@ -175,6 +175,14 @@
         """
         return self.hd_no_transmit_msg_list
 
+    def get_ui_version(self):
+        """
+        Gets the last recieved ui_version from the HD
+
+        @return: ui_version in a string.
+        """
+        return self.ui_version
+
     @publish(["hd_logged_in"])
     def hd_set_logged_in_status(self, logged_in: bool = False):
         """
@@ -224,11 +232,15 @@
             message['message'][self.START_POS_BUILD:self.END_POS_BUILD]))
         compatibility = struct.unpack('<I', bytearray(
             message['message'][self.START_POS_COMPATIBILITY_REV:self.END_POS_COMPATIBILITY_REV]))
-        self.logger.debug(f"handler hit.")
+
         if all([len(each) > 0 for each in [major, minor, micro, build, compatibility]]):
             self.ui_version = f"v{major[0]}.{minor[0]}.{micro[0]}-{build[0]}.{compatibility[0]}"
             self.logger.debug(f"UI VERSION: {self.ui_version}")
 
+        else:
+            self.ui_version = None
+            self.logger.debug("Failed to retrieve UI Version.")
+
     def cmd_log_in_to_hd(self, resend: bool = False) -> int:
         """
         Constructs and sends a login command via CAN bus.  Login required before \n