Did not received ISOTP frame

[mpersisth]

[root@localhost test]# python3 example.py
2024-09-13 16:23:04 [INFO] Connection: Connection opened
2024-09-13 16:23:04 [INFO] UdsClient: ECUReset<0x11> - Requesting reset of type 0x01 (hardReset)
2024-09-13 16:23:04 [DEBUG] Connection: Sending 2 bytes : [1101]
2024-09-13 16:23:05 [DEBUG] Connection: No data received: [TimeoutException] - Did not received ISOTP frame in time (timeout=1 sec)
2024-09-13 16:23:05 [ERROR] UdsClient: [TimeoutException] : Did not receive response in time. P2 timeout time has expired (timeout=1.000 sec)

C[root@localhost uds-server-master]# candump vcan1 -a
vcan1 733 [3] 02 11 01 '...'
vcan1 73B [8] 03 7F 11 11 00 00 00 00 '........'

I confirm that the response message was sent back within one second. Given this information, what potential issues could have caused this behavior?

[pylessard]

Bad address configuration could be a cause.
You can share how you setup your UDS stack, it'll be easier to review.

What connection de you use?
Can you enable timestamp in you logs?

[mpersisth]

Sorry, I'm not quite sure about the correct procedure to include timestamps in logs.
TJZ_config = {
'exception_on_negative_response' : False,
'exception_on_invalid_response' : False,
'exception_on_unexpected_response' : False,
'security_algo' : None,
'security_algo_params' : None,
'tolerate_zero_padding' : False,
'ignore_all_zero_dtc' : True,
'dtc_snapshot_did_size' : 2, # Not specified in standard. 2 bytes matches other services format.
'server_address_format' : None, # 8,16,24,32,40
'server_memorysize_format' : None, # 8,16,24,32,40
'data_identifiers' : {0xf190:""},
'input_output' : {},
'request_timeout': 5,
'p2_timeout': 0.5,
'p2_star_timeout': 5,
'use_server_timing' : False
}

udsoncan.setup_logging()
conn = IsoTPSocketConnection('vcan0', isotp.Address(isotp.AddressingMode.Normal_11bits, rxid=0x123, txid=0x733))
with Client(conn, request_timeout=2, config=TJZ_config) as client:
try:
# client.ecu_reset(ECUReset.ResetType.hardReset) # HardReset = 0x01
client.change_session(DiagnosticSessionControl.Session.defaultSession) # integer with value of 3
client.unlock_security_access(TJZ_config.debug_level) # Fictive security level. Integer coming from fictive lib, let's say its value is 5
client.write_data_by_identifier(udsoncan.DataIdentifier.VIN,'ABC123456789') # Standard ID for VIN is 0xF190. Codec is set in the client configuration
print('Vehicle Identification Number successfully changed.')

except NegativeResponseException as e:                                                                                                                         
    print('Server refused our request for service %s with code "%s" (0x%02x)' % (                                                                              
    e.response.service.get_name(), e.response.code_name, e.response.code))                                                                                     
except (InvalidResponseException, UnexpectedResponseException) as e:                                                                                           
    print('Server sent an invalid payload : %s' % e.response.original_payload)                                                                                 

[pylessard]

You copied the example as is and used an RXID of 0x123 but your device respond on 0x73B

[mpersisth]

It's done, and thank you very much.