Index: scripts/update_package_script/utilities.py
===================================================================
diff -u -r5b6f3d91478d1da65e094cdb802d6c19ab4385d8 -ra99d0580e0f14cdf80321e963a7121a2225d2c4f
--- scripts/update_package_script/utilities.py	(.../utilities.py)	(revision 5b6f3d91478d1da65e094cdb802d6c19ab4385d8)
+++ scripts/update_package_script/utilities.py	(.../utilities.py)	(revision a99d0580e0f14cdf80321e963a7121a2225d2c4f)
@@ -20,9 +20,10 @@
     CAN_COMM_IN_PROGRESS = 1
     CAN_COMM_SUCCESSFUL = 2
     CAN_COMM_TIME_OUT = 3
-    NUM_OF_CAN_COMM_STATES = 4
+    CAN_COMM_READY = 4
+    NUM_OF_CAN_COMM_STATES = 5
 
-class Utilities(Base):
+class Utilities:
 
     _CRC32_TABLE = (
         0x00000000, 0x1EDC6F41, 0x3DB8DE82, 0x2364B1C3, 0x7B71BD04, 0x65ADD245, 0x46C96386, 0x58150CC7,
@@ -74,7 +75,6 @@
 
     def __init__(self):
 
-        super().__init__()
         self._can_bus = SocketcanBus(channel=self._CAN_INTERFACE)
         self._msg_id_count = 0
         self._msg_sw_update_index = 0
@@ -105,12 +105,13 @@
 
         self._send_can_message(self._SEND_CMD_MAIL_BOX, can_msg_bytes, self.SEND_MSG_ACK_STATUS_KEY_NAME,
                                wait_for_resp_s=self._MIN_CAN_WAIT_FOR_RESP_S)
-        # TODO remove
+        # TODO remove for testing only
         sleep(0.7)
         self._msg_ack_nack_status[self.SEND_MSG_ACK_STATUS_KEY_NAME] = CanCommStatus.CAN_COMM_SUCCESSFUL.value
+        self._msg_ack_nack_status[self.UPDATE_MSG_ACK_STATUS_KEY_NAME] = CanCommStatus.CAN_COMM_READY.value
         # TODO remove
 
-    def send_software_update_msg(self, target: int, data: list, update_payload_len: int, signature_msg: bool = False):
+    def send_software_update_msg(self, target: int, data: bytes, update_payload_len: int, signature_msg: bool = False):
 
         mail_box = self._update_mail_boxes[target][0]
         time_out_s = self._update_mail_boxes[target][1]
@@ -120,7 +121,7 @@
         temp = bytes()
         can_msg_bytes = self._convert_data_to_bytes('<B', self._msg_id_count)
         can_msg_bytes += self._convert_data_to_bytes('<B', target)
-        if signature_msg is False:
+        if not signature_msg:
             can_msg_bytes += self._convert_data_to_bytes('<H', update_payload_len)
         else:
             # struct does not accept 0xFFFF for 2 bytes pack
@@ -142,15 +143,16 @@
                 self._send_can_message(mail_box, bytes_to_send, self.UPDATE_MSG_ACK_STATUS_KEY_NAME,
                                        wait_for_resp_s=resp_time_out_s)
 
-        while True:
-            message = self._can_bus.recv()
-            if message is not None:
-                if '0x606' == hex(message.arbitration_id) and message.data[0] == self._msg_id_count:
-                    print(self._msg_id_count, message)
-                    write_data = str(self._msg_id_count) + ', ' + str(message) + '\r'
-                    self.file_handle.write(write_data)
-                    self._msg_ack_nack_status[self.UPDATE_MSG_ACK_STATUS_KEY_NAME] = CanCommStatus.CAN_COMM_SUCCESSFUL.value
-                    break
+        #while True:
+        #    message = self._can_bus.recv()
+        #    if message is not None:
+        #        print(message)
+        #        if '0x606' == hex(message.arbitration_id) and message.data[0] == self._msg_id_count:
+        #            print(self._msg_id_count, message)
+        #            write_data = str(self._msg_id_count) + ', ' + str(message) + '\r'
+        #            self.file_handle.write(write_data)
+        #            self._msg_ack_nack_status[self.UPDATE_MSG_ACK_STATUS_KEY_NAME] = CanCommStatus.CAN_COMM_READY.value
+        #            break
 
     @classmethod
     def _get_crc32(cls, data):