Index: leahi_dialin/dd/modules/pre_gen_dialysate.py
===================================================================
diff -u -r252b89bc37ea3f3e104671dfa2c59231bffc7e52 -r4356d86fbeba5afa08ebe258b9ad271f345e1b82
--- leahi_dialin/dd/modules/pre_gen_dialysate.py	(.../pre_gen_dialysate.py)	(revision 252b89bc37ea3f3e104671dfa2c59231bffc7e52)
+++ leahi_dialin/dd/modules/pre_gen_dialysate.py	(.../pre_gen_dialysate.py)	(revision 4356d86fbeba5afa08ebe258b9ad271f345e1b82)
@@ -100,4 +100,64 @@
             return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
         else:
             self.logger.debug("Timeout!!!!")
+            return False
+
+    def cmd_start_pre_gen_mode_override(self, state: int, reset: int = NO_RESET) -> int:
+        """
+        Constructs and sends start pre gen mode override request
+
+        @param state:  int - value to override state
+        @param reset:  integer - 1 to reset a previous override, 0 to override
+        @return: 1 if successful, zero otherwise
+
+        """
+
+        reset_value = integer_to_bytearray(reset)
+        interval_value = integer_to_bytearray(state)
+        payload = reset_value + interval_value
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dd_ch_id,
+                                              message_id=MsgIds.MSG_ID_DD_START_PRE_GEN_DIALYSATE_MODE_OVERRIDE_REQUEST.value,
+                                              payload=payload)
+
+        self.logger.debug("Sending {} start pre gen mode override".format(state))
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content in message
+        if received_message is not None:
+            # Response payload is OK or not
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.debug("Timeout!!!!")
+            return False
+
+    def cmd_stop_pre_gen_mode_override(self, state: int, reset: int = NO_RESET) -> int:
+        """
+        Constructs and sends start pre gen mode override request
+
+        @param state:  int - value to override state
+        @param reset:  integer - 1 to reset a previous override, 0 to override
+        @return: 1 if successful, zero otherwise
+
+        """
+
+        reset_value = integer_to_bytearray(reset)
+        interval_value = integer_to_bytearray(state)
+        payload = reset_value + interval_value
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dd_ch_id,
+                                              message_id=MsgIds.MSG_ID_DD_STOP_PRE_GEN_DIALYSATE_MODE_OVERRIDE_REQUEST.value,
+                                              payload=payload)
+
+        self.logger.debug("Sending {} start pre gen mode override".format(state))
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content in message
+        if received_message is not None:
+            # Response payload is OK or not
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.debug("Timeout!!!!")
             return False
\ No newline at end of file