Facing Issue while reading the profile (Serial Interface) using Python

Thank You For your response Mikko... GXDLMSDirector I got a response...I'm trying to connect serial Interface (Optical) using python script. I can successfully execute configuration parameters (Clock and invocation counter) without any errors. But when i try to profiles Read, i am getting Access Error.Please help me in reading profiles data from a serial interface using python script.

I am pasting the trace below from Command.

C:\Users\RTHA1KOR\PycharmProjects\pythonProject33\Smart_Meter\Gurux.DLMS.Python\Gurux.DLMS.Optical.python>python main.py -S COM8
gurux_dlms version: 1.0.143
gurux_net version: 1.0.20
gurux_serial version: 1.0.20
------------------------------------------------------------
Messages\LN\Nameplate
Authentication: 0
ClientAddress: 0x10
ServerAddress: 0x1
------------------------------------------------------------
<GetRequest>
<GetRequestNormal>
<InvokeIdAndPriority Value="193" />
<AttributeDescriptor>
<ClassId Value="7" />

<InstanceId Value="00005E5B0AFF" />
<AttributeId Value="2" />
</AttributeDescriptor>
</GetRequestNormal>
</GetRequest>

Access Error : Device reports a undefined object.
DisconnectRequest
Ended. Press any key to continue.

I'm trying to read Nameplate profile but i am getting access error.

code:

import os
import os.path
import sys
import traceback
from gurux_common.enums import TraceLevel
from gurux_common.GXCommon import GXCommon
from gurux_serial import GXSerial
from gurux_net import GXNet
from gurux_dlms import GXDLMSException, GXDLMSExceptionResponse, GXDLMSConfirmedServiceError
from gurux_dlms import GXReplyData
from gurux_dlms.enums import InterfaceType, Command
from GXSettings import GXSettings
from GXDLMSReader import GXDLMSReader

dlms_endpoint: str = 1
dlms_System_title:str = "qwertyui"
dlms_authentication_key: bytes = "4145575F5057525F414B5F454B5F3234"
dlms_block_cipher_key: bytes = "4145575F5057525F414B5F454B5F3234"
dlms_password:bytes = "4145575F504F5745525F534D5F303234"

Nameplate_obis_code: str = "0.0.94.91.10.255"
instantaneous_obis_code: str = "1.0.94.91.0.255"
billing_obis_code: str = "1.0.98.1.0.255"
block_load_obis_code: str = "1.0.99.1.0.255"
Event_Voltage_Related_obis_code: str = "0.0.99.98.0.255"
Event_Current_Related_obis_code: str = "0.0.99.98.1.255"
Event_Power_Related_obis_code: str = "0.0.99.98.2.255"
Event_Transaction_Related_obis_code: str = "0.0.99.98.3.255"
Event_Other_Related_obis_code: str = "0.0.99.98.4.255"
Event_NonRollOver_Related_obis_code: str = "0.0.99.98.5.255"
Event_Control_Related_obis_code: str = "0.0.99.98.6.255"

try:
import pkg_resources
#pylint: disable=broad-except
except Exception:
#It's OK if this fails.
print("pkg_resources not found")

#pylint: disable=too-few-public-methods,broad-except
class sampleclient():

#Returns True, is command is in XML file.
@classmethod
def ___containsCommand(cls, actions, command):
for it in actions:
if it.command == command:
return True

return False

# Handle meter reply.
# reply: Received reply.
@classmethod
def handleReply(cls, reply):
if isinstance(reply.value, (bytes, bytearray)):
print(GXCommon.toHex(reply.value))
print(str(reply))
else:
print(str(reply))

@classmethod
def main(cls, args):
try:
print("gurux_dlms version: " + pkg_resources.get_distribution("gurux_dlms").version)
print("gurux_net version: " + pkg_resources.get_distribution("gurux_net").version)
print("gurux_serial version: " + pkg_resources.get_distribution("gurux_serial").version)
except Exception:
#It's OK if this fails.
print("pkg_resources not found")

# args: the command line arguments
reader = None
settings = GXSettings()
try:
# //////////////////////////////////////
# Handle command line parameters.
ret = settings.getParameters(args)
if ret != 0:
return
# //////////////////////////////////////
# Initialize connection settings.
if not isinstance(settings.media, (GXSerial, GXNet)):
raise Exception("Unknown media type.")
# //////////////////////////////////////
if not settings.path:
if settings.client.useLogicalNameReferencing:
settings.path = "Messages\\LN"
else:
settings.path = "Messages\\SN"
if os.path.isdir(settings.path):
#files = os.listdir(settings.path)
files = [os.path.join(settings.path, name) for name in os.listdir(settings.path)]
else:
files = []
files.append(settings.path)
#Execute messages.
for file in files:
name = os.path.splitext(file)[0]
if settings.trace > TraceLevel.WARNING:
print("------------------------------------------------------------")
print(name)
actions = settings.client.load(file)
#If there aren't actions in the file.
if not actions:
continue
try:
settings.media.open()
reader = GXDLMSReader(settings.client, settings.media, settings.trace, settings.invocationCounter)
reply = GXReplyData()
#Send SNRM if not in xml.
if settings.client.interfaceType == InterfaceType.HDLC:
if not sampleclient.___containsCommand(actions, Command.SNRM):
reader.snrmRequest()

#Send AARQ if not in xml.
if not sampleclient.___containsCommand(actions, Command.AARQ):
if not sampleclient.___containsCommand(actions, Command.SNRM):
reader.aarqRequest()

for it in actions:
if it.command == Command.SNRM and settings.client.interfaceType == InterfaceType.WRAPPER:
continue
if it.command == Command.DISCONNECT_REQUEST and settings.client.interfaceType == InterfaceType.WRAPPER:
break
#Send
reply.clear()
if settings.trace > TraceLevel.WARNING:
print("------------------------------------------------------------")
print(str(it))

if it.isRequest():
reader.readDataBlock(settings.client.pduToMessages(it), reply)
cls.handleReply(reply)
except (ValueError, GXDLMSException, GXDLMSExceptionResponse, GXDLMSConfirmedServiceError) as ex:
print(ex)
except (KeyboardInterrupt, SystemExit, Exception) as ex:
traceback.print_exc()
if settings.media:
settings.media.close()
reader = None
finally:
if reader:
try:
#Send disconnect if not in xml.
if not sampleclient.___containsCommand(actions, Command.DISCONNECT_REQUEST):
reader.disconnect()
else:
settings.media.close()
reader.close()
except Exception:
traceback.print_exc()
print("Ended. Press any key to continue.")

if __name__ == '__main__':
sampleclient.main(sys.argv)

Inside LN path :
<?xml version="1.0" encoding="utf-8"?>
<!--Connect to the LN meter and read Nameplate Profile.-->
<Messages>
<GetRequest>
<GetRequestNormal>
<InvokeIdAndPriority Value="193" />
<AttributeDescriptor>
<ClassId Value="7" />
<!--0.0.94.91.10.255-->
<InstanceId Value="00005E5B0AFF" />
<AttributeId Value="2" />
</AttributeDescriptor>
</GetRequestNormal>
</GetRequest>
</Messages>

I can successfully execute configuration parameters (Clock and invocation counter) without any errors. But when i try to profiles Read, i am getting Access Error.Please help me in reading profiles data from a serial interface using python script. Kindly do the needful....