o3DIAG

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). Main Features

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 for easier understanding.

P-Code Translation

• The program can look up diagnostic codes (P0000–P0999 and beyond) from an integrated script-based list.
• Instead of showing just the raw code, the program displays the human-readable meaning of each fault.

User Interface

• Scrollable log window that shows all communication with the adapter.
• Each entry is timestamped for clarity (Beta 1.5 or later).
• Clear log function, with an automatic program banner shown again for orientation.
• Info/Warning section with program details and disclaimers.

With o3DIAG, users can quickly access essential vehicle information, monitor live sensor data, and interpret engine fault codes in a clear and user-friendly interface. It is a practical tool for basic diagnostics and understanding of OBD-II data.