python-doipclient

doipclient is a pure Python 3 Diagnostic over IP (DoIP) client which can be used for communicating with modern ECU's over automotive ethernet. It implements the majority of ISO-13400 (2019) from the perspective of a short-lived synchronous client. The primary use case is to serve as a transport layer implementation for the udsoncan library. The code is published under MIT license on GitHub (jacobschaer/python-doipclient).

Documentation

The documentation is available here : https://python-doipclient.readthedocs.io/

Requirements

• Python 3.6+

Installation

using pip:

pip install doipclient

Running Tests from source

using pytest:

pip install pytest pytest-mock
pytest

Example

Updated version of udsoncan's example using python_doip instead of IsoTPSocketConnection

import SomeLib.SomeCar.SomeModel as MyCar

import udsoncan
from doipclient import DoIPClient
from doipclient.connectors import DoIPClientUDSConnector
from udsoncan.client import Client
from udsoncan.exceptions import *
from udsoncan.services import *

udsoncan.setup_logging()

ecu_ip = '127.0.0.1'
ecu_logical_address = 0x00E0
doip_client = DoIPClient(ecu_ip, ecu_logical_address)
conn = DoIPClientUDSConnector(doip_client)
with Client(conn, request_timeout=2, config=MyCar.config) as client:
   try:
      client.change_session(DiagnosticSessionControl.Session.extendedDiagnosticSession)  # integer with value of 3
      client.unlock_security_access(MyCar.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.')
      client.ecu_reset(ECUReset.ResetType.hardReset)                                     # HardReset = 0x01
   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)

   # Because we reset our UDS server, we must also reconnect/reactivate the DoIP socket
   # Alternatively, we could have used the auto_reconnect_tcp flag on the DoIPClient
   # Note: ECU's do not restart instantly, so you may need a sleep() before moving on
   doip_client.reconnect()
   client.tester_present()

# Cleanup the DoIP Socket when we're done. Alternatively, we could have used the
# close_connection flag on conn so that the udsoncan client would clean it up
doip_client.close()

python-uds Support

The python-uds can also be used but requires a fork until the owner merges this PR Doip #63. For now, to use the port:

using pip:

git clone https://github.com/jacobschaer/python-uds
git checkout doip
cd python-uds
pip install .

Example:

from uds import Uds

ecu = Uds(transportProtocol="DoIP", ecu_ip="192.168.1.1", ecu_logical_address=1)
try:
    response = ecu.send([0x3E, 0x00])
    print(response)  # This should be [0x7E, 0x00]
except:
    print("Send did not complete")