This repository contains the complete project files for the X-Meter, a custom-built hardware device for automotive diagnostics and real-time data display. This legacy project was developed around 2007 as a passion project for the car enthusiast community.

The X-Meter connects to a vehicle's OBD2 port and provides a wealth of information, acting as a multi-gauge, trip computer, and diagnostic scanner.

• Microcontroller: The hardware is powered by an 8051-family microcontroller.
• OBD2 Interface: It uses an ELM327-compatible chip for vehicle communication.
• Firmware: The firmware is written in Assembly language.
• PC Software: The updater and configuration utility were programmed in Delphi 7.

• Real-time Data Display: Shows two selectable engine parameters simultaneously (e.g., RPM, vehicle speed, coolant temp, engine load, etc.).
• Diagnostic Tool: Can read and clear Diagnostic Trouble Codes (DTCs) and reset the Powertrain Control Module (PCM).
• Customizable Alerts: Set visual and audible warnings for user-defined limits (e.g., high coolant temperature).
• Configurable Interface: Adjust backlight, sound, and auto-sleep settings.
• Expandable: The hardware design includes an extension port for future functionality.

Front View	Rear View

Updater Software	Warning Limit Feature

• Hardware/: Contains hardware design files (schematics, PCB layouts for v1 and v2) and hardware images.
• Webpage/: The original HTML webpage and images used to document the project.
• XFirmware/: The 8051 assembly source code (.asm) and compiled firmware (.hex).
• Hex2Const/: A Delphi 7 project for the PC-based firmware updater and configuration utility.
• XUpdater/: Files related to the firmware updater tool.
• XMETER_prototype/: (Outdated) Files from the early prototyping stage.

This is a legacy project from 2007. The files are provided as-is for historical and educational purposes. Some of the tools, libraries, and links in the original documentation may be outdated.

This project was designed and developed by Va&Cob(Jerry)