Index: dialin/hd/air_pump.py
===================================================================
diff -u -rda3a2451ace2c0e28343e258867755dc5bd3b8dc -r95c9212e8ea98f30b4c16f50d7834aa6575c4657
--- dialin/hd/air_pump.py	(.../air_pump.py)	(revision da3a2451ace2c0e28343e258867755dc5bd3b8dc)
+++ dialin/hd/air_pump.py	(.../air_pump.py)	(revision 95c9212e8ea98f30b4c16f50d7834aa6575c4657)
@@ -47,8 +47,15 @@
         return self.air_pump_state
 
     def _handler_air_pump_sync(self, message):
-        pass
+        """
+        Handles published air pump data messages.
 
+        @param message:  published air pump data message as: air pump state
+        @return: None
+        """
+        self.air_pump_state = struct.unpack('<I', bytearray(
+            message['message'][MsgFieldPositions.START_POS_FIELD_1:MsgFieldPositions.END_POS_FIELD_1]))[0]
+
     def cmd_air_trap_level_sensor_override(self, state: int) -> int:
         """
         Constructs and sends the air pump level sensor override command