# cedricp/ddt4all

OBD tool

Repository: https://github.com/cedricp/ddt4all
Canonical: https://ross.abutalabs.com/products/ddt4all
Language: Python
License: GPL-3.0
License Family: copyleft
Topics: ecu, vehicle, obd2, can-bus, elm327
Last push: 2026-08-23T22:09:58+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 3590, "days_push": 10, "days_rel": 10, "gap_med": 33.0, "n_releases_24m": 11}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1821, forks 312 (observed 2026-08-28T04:05:40.913058+00:00)

## What it is
DDT4ALL is a cross-platform Python diagnostic application for vehicle CAN bus networks that communicates with ECUs over OBD-II interfaces such as ELM327, VLinker, VGate, and OBDLink adapters. It supports reading and clearing DTCs, ECU auto-scanning, live parameter monitoring, custom ECU parameter screen design, CAN sniffing, DoIP/KWP2000 protocols, and a plugin system for vehicle-specific procedures.

## Use cases
- read and clear diagnostic trouble codes on my car
- scan vehicle ECUs over OBD-II with an ELM327 adapter
- monitor live engine parameters from the CAN bus
- create custom ECU parameter screens for diagnostics
- sniff CAN bus traffic on a vehicle network
- communicate with ECUs using DoIP or KWP2000 protocols

## When to choose
- you need a free, cross-platform OBD-II diagnostic tool with ECU scanning and DTC support
- you want to build custom ECU parameter screens or run vehicle-specific procedures via plugins
- you work with supported adapters like ELM327, VLinker FS, VGate iCar Pro, or OBDLink and understand CAN networks

## When to avoid
- you don't understand CAN bus or ECU fundamentals - misuse can seriously damage a live vehicle
- you need a polished, production-grade commercial diagnostic suite rather than work-in-progress software
- you need passive read-only scanning only with zero risk - even so, expert mode features require caution

## Facets
- artifact type: application
- maturity: active
- function: gui, developer-tools, monitoring, plugin-system, internationalization
- domain: hardware, cross-platform, developer-tools
- platform: cross-platform, python, windows
- tags: obd2, ecu, can-bus, elm327, vehicle-diagnostics, doip, kwp2000, dtc, automotive-diagnostics, desktop, linux, macos

## Member repositories
- cedricp/ddt4all (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:40.913058+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:19:56.908513+00:00, confidence not recorded.
  - readme: https://github.com/cedricp/ddt4all (fetched 2026-08-28T04:05:40.913058+00:00, sha 62d425a129ad)
- Data as of 2026-08-30T08:39:29.467469+00:00.