Index: dialin/hd/blood_leak.py
===================================================================
diff -u
--- dialin/hd/blood_leak.py	(revision 0)
+++ dialin/hd/blood_leak.py	(revision cb04db4bbb066c806d47398f3b2e819bbacc55e4)
@@ -0,0 +1,146 @@
+###########################################################################
+#
+# Copyright (c) 2019-2021 Diality Inc. - All Rights Reserved.
+#
+# THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
+# WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
+#
+# @file fluid_leak.py
+#
+# @author (last) Peman Montazemi
+# @date (last) 15-Apr-2021
+# @author (original) Peman Montazemi
+# @date (original) 15-Apr-2021
+#
+############################################################################
+import struct
+from ..utils.conversions import integer_to_bytearray, float_to_bytearray
+from ..common.msg_defs import MsgIds, MsgFieldPositions
+from .constants import RESET, NO_RESET
+from ..protocols.CAN import (DenaliMessage, DenaliChannels)
+from ..utils.base import _AbstractSubSystem, _publish
+from logging import Logger
+
+
+class HDBloodLeak(_AbstractSubSystem):
+    """
+    HDBloodLeak
+
+    Hemodialysis Delivery (HD) Dialin API sub-class for blood leak related commands.
+    """
+
+    # Blood leak detector status
+    BLOOD_LEAK_DETECTED = 0      # Blood
+    NO_BLOOD_LEAK_DETECTED = 1   # No blood
+
+    def __init__(self, can_interface, logger: Logger):
+        """
+
+        @param can_interface: Denali Can Messenger object
+        """
+        super().__init__()
+        self.can_interface = can_interface
+        self.logger = logger
+
+        if self.can_interface is not None:
+            channel_id = DenaliChannels.hd_sync_broadcast_ch_id
+            msg_id = MsgIds.MSG_ID_HD_BLOOD_LEAK_STATUS_OVERRIDE.value
+            self.can_interface.register_receiving_publication_function(channel_id, msg_id,
+                                                                       self._handler_blood_leak_sync)
+
+        self.blood_leak_status = self.NO_BLOOD_LEAK_DETECTED
+
+    def get_blood_leak_status(self):
+        """
+        Gets the current blood leak status
+
+        @return: List containing blood leak status: [detected, undetected]
+        """
+        return self.blood_leak_status
+
+    @_publish("blood_leak_status")
+    def _handler_blood_leak_sync(self, message):
+        """
+        Handles published blood leak status messages.  Blood leak status is captured
+        for reference.
+
+        @param message:  published blood leak status message
+        @return: None
+        """
+
+        state = struct.unpack('i', bytearray(
+                message['message'][MsgFieldPositions.START_POS_FIELD_1:MsgFieldPositions.END_POS_FIELD_1]))
+
+        self.blood_leak_state = state[0]
+
+    def cmd_blood_leak_detector_override(self, detected, reset=NO_RESET):
+        """
+        Constructs and sends the blood leak detector state override command
+        Constraints:
+            Must be logged into HD.
+            Given detector must be one of the detectors listed below.
+
+        @param detected:  unsigned int - detected (0=wet, 1=dry) to override detector with
+        @param reset:  integer - 1 to reset a previous override, 0 to override
+        @return: 1 if successful, zero otherwise
+        """
+
+        rst = integer_to_bytearray(reset)
+        det = float_to_bytearray(detected)
+        payload = rst + det
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
+                                              message_id=MsgIds.MSG_ID_HD_BLOOD_LEAK_STATUS_OVERRIDE.value,
+                                              payload=payload)
+
+        self.logger.debug("Override blood leak detector state value")
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content...
+        if received_message is not None:
+            # response payload is OK or not OK
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.debug("Timeout!!!!")
+            return False
+
+    def cmd_blood_leak_state_broadcast_interval_override(self, ms, reset=NO_RESET):
+        """
+        Constructs and sends the blood leak state broadcast interval override command
+        Constraints:
+            Must be logged into HD.
+            Given interval must be non-zero and a multiple of the HD priority task interval (10 ms).
+
+        @param ms:  integer - interval (in ms) to override with
+        @param reset:  integer - 1 to reset a previous override, 0 to override
+        @return: 1 if successful, zero otherwise
+        """
+
+        rst = integer_to_bytearray(reset)
+        mis = integer_to_bytearray(ms)
+        payload = rst + mis
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
+                                              message_id=MsgIds.MSG_ID_HD_BLOOD_LEAK_DATA_SEND_INTERVAL_OVERRIDE.value,
+                                              payload=payload)
+
+        self.logger.debug("Override HD blood leak data broadcast interval")
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content...
+        if received_message is not None:
+            if reset == RESET:
+                str_res = "reset back to normal: "
+            else:
+                str_res = str(ms) + " ms: "
+            self.logger.debug("Blood leak data broadcast interval overridden to " + str_res +
+                  str(received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]))
+            # response payload is OK or not OK
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.debug("Timeout!!!!")
+            return False
Index: dialin/hd/hemodialysis_device.py
===================================================================
diff -u -r0a5edee793018705c54562d73a9a1d5ee648cb41 -rcb04db4bbb066c806d47398f3b2e819bbacc55e4
--- dialin/hd/hemodialysis_device.py	(.../hemodialysis_device.py)	(revision 0a5edee793018705c54562d73a9a1d5ee648cb41)
+++ dialin/hd/hemodialysis_device.py	(.../hemodialysis_device.py)	(revision cb04db4bbb066c806d47398f3b2e819bbacc55e4)
@@ -17,6 +17,7 @@
 from .accelerometer import HDAccelerometer
 from .air_trap import HDAirTrap
 from .alarms import HDAlarms
+from .blood_leak import HDBloodLeak
 from .buttons import HDButtons
 from .ui_proxy import HDUIProxy
 from .watchdog import HDWatchdog
@@ -109,6 +110,7 @@
         self.air_trap = HDAirTrap(self.can_interface, self.logger)
         self.alarms = HDAlarms(self.can_interface, self.logger)
         self.buttons = HDButtons(self.can_interface, self.logger)
+        self.blood_leak = HDBloodLeak(self.can_interface, self.logger)
         self.ui = HDUIProxy(self.can_interface, self.logger)
         self.rtc = HDRTC(self.can_interface, self.logger)
         self.watchdog = HDWatchdog(self.can_interface, self.logger)
Index: tests/hd_blood_leak_data.py
===================================================================
diff -u
--- tests/hd_blood_leak_data.py	(revision 0)
+++ tests/hd_blood_leak_data.py	(revision cb04db4bbb066c806d47398f3b2e819bbacc55e4)
@@ -0,0 +1 @@

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