python-udsonip

Enhanced UDS-on-IP Integration Library

Note: Install via pip install udsonip (package name without the python- prefix)

udsonip is a high-level Python library that seamlessly integrates python-doipclient and python-udsoncan to provide enhanced multi-ECU support, improved ergonomics, and advanced features for automotive diagnostics over DoIP (Diagnostics over Internet Protocol).

📖 Documentation:

• For Users: This README (installation, usage, examples)
• For Contributors: See CONTRIBUTING.md (setup, testing, contribution guidelines)
• Project Status: See DEVELOPMENT.md (features, roadmap, architecture)

Features

• 🎯 Dynamic Target Address Support - Runtime switching between ECU addresses
• 🔄 Multi-ECU Management - Single connection managing multiple ECUs with context managers
• 🔍 Auto-Discovery - Automatic ECU enumeration and discovery
• 📡 Enhanced Session Management - Per-ECU session tracking and persistence
• 🛠️ Simplified API - Less boilerplate, sensible defaults

Installation

pip install udsonip

Quick Start

Single ECU Communication

from udsonip import UdsOnIpClient

# Simple single-ECU client
client = UdsOnIpClient('192.168.1.10', 0x00E0)
response = client.read_data_by_identifier(0xF190)  # Read VIN
print(f"VIN: {response.data.decode()}")
client.close()

Multi-ECU Communication

from udsonip import DoIPManager

# Multi-ECU manager
manager = DoIPManager('192.168.1.10')
manager.add_ecu('engine', 0x00E0)
manager.add_ecu('transmission', 0x00E1)

# Switch between ECUs seamlessly
with manager.ecu('engine') as ecu:
    vin = ecu.read_data_by_identifier(0xF190)

with manager.ecu('transmission') as ecu:
    status = ecu.read_data_by_identifier(0x1234)

Auto-Discovery

from udsonip import discover_ecus

# Discover all ECUs on the network
ecus = discover_ecus(timeout=5.0)
for ecu in ecus:
    print(f"Found ECU: {ecu.ip} @ {ecu.logical_address:#x}")
    
# Connect to discovered ECU
client = ecus[0].connect()

Advanced Usage - Dynamic Target Switching

from udsonip import UdsOnIpClient

client = UdsOnIpClient(
    ecu_ip='192.168.1.10',
    ecu_address=0x00E0,
    auto_reconnect=True,
    keep_alive=True,
)

# Dynamic target address switching
client.target_address = 0x00E1
response = client.tester_present()

client.target_address = 0x00E2
response = client.read_data_by_identifier(0xF190)

Architecture

┌─────────────────────────────────────┐
│         Your Application            │
└────────────┬────────────────────────┘
             │
┌────────────▼────────────────────────┐
│         udsonip Layer               │
│  ┌──────────────┐  ┌──────────────┐│
│  │ UdsOnIpClient│  │ MultiECU Mgr ││
│  └──────┬───────┘  └──────┬───────┘│
│         │                  │        │
│  ┌──────▼──────────────────▼──────┐│
│  │    UdsOnIpConnection          ││
│  └──────┬────────────────────────┘│
└─────────┼──────────────────────────┘
          │
┌─────────▼──────────┐  ┌─────────────┐
│  python-udsoncan   │  │doipclient   │
│  (UDS Protocol)    │  │(DoIP Trans) │
└────────────────────┘  └─────────────┘

Key Components

• UdsOnIpConnection - Enhanced connector with dynamic address support
• UdsOnIpClient - Unified client wrapping both libraries
• DoIPManager - Multi-ECU manager with context switching
• discover_ecus() - ECU discovery utilities

Why udsonip?

Before (using libraries separately):

from doipclient import DoIPClient
from udsoncan.client import Client
from udsoncan.connections import BaseConnection

# Manual setup required - 20+ lines of boilerplate
doip_client = DoIPClient('192.168.1.10', 0x00E0)
doip_client.connect()

class DoIPConnection(BaseConnection):
    def __init__(self, doip_client):
        self._doip = doip_client
    
    def send(self, data):
        self._doip.send_diagnostic(data)
    
    def wait_frame(self, timeout=None):
        return self._doip.receive_diagnostic(timeout)

connection = DoIPConnection(doip_client)
uds_client = Client(connection)

# Finally use UDS client
response = uds_client.read_data_by_identifier(0xF190)

After (using udsonip):

from udsonip import UdsOnIpClient

# Just 2 lines!
client = UdsOnIpClient('192.168.1.10', 0x00E0)
response = client.read_data_by_identifier(0xF190)

Result: 90% less code, 100% more readable! 🎉

Requirements

• Python >= 3.7
• python-doipclient >= 1.1.7
• python-udsoncan >= 1.21

API Reference

UdsOnIpClient

Main client for single ECU communication.

client = UdsOnIpClient(
    ecu_ip='192.168.1.10',
    ecu_address=0x00E0,
    client_ip=None,           # Auto-detect
    auto_reconnect=False,
    keep_alive=False,
)

Key Methods:

• read_data_by_identifier(did) - Read data by identifier
• write_data_by_identifier(did, data) - Write data
• tester_present() - Send tester present
• diagnostic_session_control(session) - Change diagnostic session
• ecu_reset(reset_type) - Reset ECU
• close() - Close connection

DoIPManager

Manager for multiple ECUs on the same gateway.

manager = DoIPManager('192.168.1.10')
manager.add_ecu('engine', 0x00E0)
manager.add_ecu('transmission', 0x00E1)

with manager.ecu('engine') as ecu:
    # Use ecu like UdsOnIpClient
    vin = ecu.read_data_by_identifier(0xF190)

Discovery Functions

from udsonip import discover_ecus, ECUInfo

# Discover all ECUs
ecus = discover_ecus(interface=None, timeout=5.0)

# Connect to discovered ECU
client = ecus[0].connect()

Learning Resources

• DoIP Standard: ISO 13400 (Diagnostics over Internet Protocol)
• UDS Standard: ISO 14229 (Unified Diagnostic Services)
• python-doipclient: https://github.com/jacobschaer/python-doipclient
• python-udsoncan: https://github.com/pylessard/python-udsoncan

Contributing

Contributions are welcome! Please see CONTRIBUTING.md for:

• Development environment setup
• Running tests
• Code style guidelines
• Contribution workflow

License

MIT License - see LICENSE file for details.

Support & Community

• Issues: https://github.com/sirius-cc-wu/python-udsonip/issues
• Documentation: https://python-udsonip.readthedocs.io
• Examples: See examples/ directory in the repository

Acknowledgments

Built on top of:

• python-doipclient by Jacob Schaer
• python-udsoncan by Pier-Yves Lessard