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o3DIAG is a diagnostic application designed to work with OBD-II vehicles through an ELM327 adapter.
It provides an easy way to connect, read vehicle data, and interpret diagnostic trouble codes (DTCs).
Official Website: https://o3diag.openw3rk.de
Main Features
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Connection Control
– Select communication port and baud rate.
– Connect or disconnect the adapter with a single click.
– Initialize the adapter automatically with the required AT commands.
Live Data Reading
– Read common engine parameters such as:
- Engine RPM (PID 010C)
- Vehicle Speed (PID 010D)
- Coolant Temperature (PID 0105)
- Engine Load (PID 0104)
– Raw responses are automatically converted into real-world values (e.g., RPM in revolutions per minute,
temperature in °C, speed in km/h).
Diagnostic Trouble Codes (DTCs)
– Read stored error codes from the engine control unit.
– Clear fault codes when required.
– Codes are translated into plain-text descriptions.
Features
- OBD-II Diagnostic
- P-Codes Translation
- Read Engine RPM
- Read Vehicle Speed
- Read Coolant Temperature
- Read Engine Load
- Read DTCs
- Full Open Source
- ELM-327 Adapter Support
- Live Data Reading
- Read Battery Voltage
- Full Adapter Initialization
Project Samples
