Index: dialin/dg/hd_proxy.py
===================================================================
diff -u -r7c24cff28bfdc1cc675d6a408cb3b96a019fd2c0 -ra434f6545892b6b025bbf2e5e0556f84507bf441
--- dialin/dg/hd_proxy.py	(.../hd_proxy.py)	(revision 7c24cff28bfdc1cc675d6a408cb3b96a019fd2c0)
+++ dialin/dg/hd_proxy.py	(.../hd_proxy.py)	(revision a434f6545892b6b025bbf2e5e0556f84507bf441)
@@ -564,3 +564,4 @@
                                               payload=payload)
         # No ACK required
         self.can_interface.send(message, 0)
+        return True
Index: dialin/hd/ui_proxy.py
===================================================================
diff -u -r1428c8a63bfcfe3b31667a9dbbf9d50d13105e63 -ra434f6545892b6b025bbf2e5e0556f84507bf441
--- dialin/hd/ui_proxy.py	(.../ui_proxy.py)	(revision 1428c8a63bfcfe3b31667a9dbbf9d50d13105e63)
+++ dialin/hd/ui_proxy.py	(.../ui_proxy.py)	(revision a434f6545892b6b025bbf2e5e0556f84507bf441)
@@ -22,7 +22,7 @@
 from ..common.hd_defs import TreatmentParameters
 from ..protocols.CAN import DenaliMessage, DenaliChannels
 from ..utils.base import AbstractSubSystem, publish, DialinEnum
-from ..utils.conversions import integer_to_bytearray, float_to_bytearray, unsigned_byte_to_bytearray, short_to_bytearray
+from ..utils.conversions import integer_to_bytearray, float_to_bytearray, unsigned_byte_to_bytearray, short_to_bytearray, byte_to_bytearray
 
 
 class HDUIProxy(AbstractSubSystem):
@@ -1825,25 +1825,18 @@
         @param response: (int) off button response to HD
         @return: 1 if successful, zero otherwise
         """
-        res = integer_to_bytearray(response)
+        res = byte_to_bytearray(response)
         payload = res
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.ui_to_hd_ch_id,
                                               message_id=MsgIds.MSG_ID_OFF_BUTTON_PRESS_REQUEST.value,
                                               payload=payload)
 
         self.logger.debug("Sending Power off message request with value {}".format(res))
+        # No ACK required
+        self.can_interface.send(message, 0)
+        return True
 
-        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_get_ro_only_mode_status(self) -> int:
         """
         Constructs and sends a message to DG to set the status of the RO only mode: