This project is an implementation of the Unified Diagnostic Services (UDS) protocol defined by ISO-14229 written in Python 3. The code is published under MIT license on GitHub (pylessard/python-udsoncan).
The documentation is available here : http://udsoncan.readthedocs.io
- Python 3.7+
using pip:
pip install udsoncan
import SomeLib.SomeCar.SomeModel as MyCar
import udsoncan
import isotp
from udsoncan.connections import IsoTPSocketConnection
from udsoncan.client import Client
from udsoncan.exceptions import *
from udsoncan.services import *
udsoncan.setup_logging()
conn = IsoTPSocketConnection('can0', isotp.Address(isotp.AddressingMode.Normal_11bits, rxid=0x123, txid=0x456))
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)
