Index: dialin/dg/load_cells.py
===================================================================
diff -u -re38f90b8c83f4f89b8388d526fec8a751f9900ed -rd8a3f72286485cdf8c5300a303c75eb3590564c3
--- dialin/dg/load_cells.py	(.../load_cells.py)	(revision e38f90b8c83f4f89b8388d526fec8a751f9900ed)
+++ dialin/dg/load_cells.py	(.../load_cells.py)	(revision d8a3f72286485cdf8c5300a303c75eb3590564c3)
@@ -7,8 +7,8 @@
 #
 # @file    load_cells.py
 #
-# @author  (last)      Sean Nash
-# @date    (last)      12-Nov-2021
+# @author  (last)      Dara Navaei
+# @date    (last)      23-Aug-2022
 # @author  (original)  Sean
 # @date    (original)  14-Apr-2020
 #
@@ -21,7 +21,7 @@
 from ..protocols.CAN import DenaliMessage, DenaliChannels
 from ..utils.base import AbstractSubSystem, publish
 from ..utils.checks import check_broadcast_interval_override_ms
-from ..utils.conversions import integer_to_bytearray, float_to_bytearray
+from ..utils.conversions import integer_to_bytearray, float_to_bytearray, bytearray_to_float
 
 
 class DGLoadCells(AbstractSubSystem):
@@ -37,6 +37,8 @@
     LOAD_CELL_B1 = 2
     LOAD_CELL_B2 = 3
 
+    EMPTY_RESERVOIR_WEIGHT_GRAMS = 1600
+
     def __init__(self, can_interface, logger: Logger):
         """
 
@@ -74,14 +76,14 @@
         @return: None
         """
 
-        a1 = struct.unpack('f', bytearray(
-            message['message'][MsgFieldPositions.START_POS_FIELD_1:MsgFieldPositions.END_POS_FIELD_1]))
-        a2 = struct.unpack('f', bytearray(
-            message['message'][MsgFieldPositions.START_POS_FIELD_2:MsgFieldPositions.END_POS_FIELD_2]))
-        b1 = struct.unpack('f', bytearray(
-            message['message'][MsgFieldPositions.START_POS_FIELD_3:MsgFieldPositions.END_POS_FIELD_3]))
-        b2 = struct.unpack('f', bytearray(
-            message['message'][MsgFieldPositions.START_POS_FIELD_4:MsgFieldPositions.END_POS_FIELD_4]))
+        self.load_cell_A1 = struct.unpack('f', bytearray(
+            message['message'][MsgFieldPositions.START_POS_FIELD_1:MsgFieldPositions.END_POS_FIELD_1]))[0]
+        self.load_cell_A2 = struct.unpack('f', bytearray(
+            message['message'][MsgFieldPositions.START_POS_FIELD_2:MsgFieldPositions.END_POS_FIELD_2]))[0]
+        self.load_cell_B1 = struct.unpack('f', bytearray(
+            message['message'][MsgFieldPositions.START_POS_FIELD_3:MsgFieldPositions.END_POS_FIELD_3]))[0]
+        self.load_cell_B2 = struct.unpack('f', bytearray(
+            message['message'][MsgFieldPositions.START_POS_FIELD_4:MsgFieldPositions.END_POS_FIELD_4]))[0]
 
         self.load_cell_A1 = a1[0]
         self.load_cell_A2 = a2[0]
@@ -97,6 +99,7 @@
 
         @param sensor: unsigned int - sensor ID
         @param grams:  float - weight (in grams) to override sensor with
+        @param add_reservoir_weight: bool - Adds the empty reservoir weight, 1600g to the override
         @param reset:  integer - 1 to reset a previous override, 0 to override
         @param raw: integer - 1 to override calibrated weight, 0 to override filtered/tared weight
         @return: 1 if successful, zero otherwise
@@ -108,21 +111,25 @@
             3 = B2 \n
         """
 
+        if add_reservoir_weight:
+            grm = float_to_bytearray(grams + self.EMPTY_RESERVOIR_WEIGHT_GRAMS)
+        else:
+            grm = float_to_bytearray(grams)
+
         rst = integer_to_bytearray(reset)
-        grm = float_to_bytearray(grams)
         idx = integer_to_bytearray(sensor)
         cal = integer_to_bytearray(raw)
         payload = rst + grm + idx + cal
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dg_ch_id,
                                               message_id=MsgIds.MSG_ID_LOAD_CELL_OVERRIDE.value,
                                               payload=payload)
-
-        self.logger.debug("override load cell weight value for sensor " + str(sensor))
-
         # Send message
         received_message = self.can_interface.send(message)
 
+        self.logger.debug(
+            f"override load cell weight value for sensor {str(sensor)} to {bytearray_to_float(grm, 0)[0]} grams")
+
         # If there is content...
         if received_message is not None:
             # response payload is OK or not OK