ObdGraphs is an Android application intended to collect and display vehicle telemetry.

About

The ObdGraphs Android application, is a feature-rich tool designed for real-time vehicle telemetry visualization using ELM327 and STNxxxx OBD2 adapters. Built atop the ObdMetrics Java framework, it offers a comprehensive suite of functionalities tailored for automotive diagnostics and performance monitoring.

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🚀 Key Features and Capabilities

• Broad Adapter Compatibility: Seamlessly connects with ELM327 and STNxxxx OBD2 adapters via Bluetooth, WiFi, or USB.
• Real-Time Data Visualization: Transforms raw sensor data into intuitive, customizable gauges and high-frequency graphs for instant analysis.
• Native Engine Support: Features specialized, native support for high-performance engines, specifically optimized for:
  • Alfa Romeo 1.75 TBI - 4C, Giulietta
  • Alfa Romeo 2.0 GME - Giulia, and Stelvio
• Android Auto Integration: Extends the diagnostic experience directly to your vehicle’s infotainment screen, allowing you to monitor critical engine parameters safely while on the road.
• Alerting: Ability to set upper and lower threshold for individual metrics
• Adapter Compatibility: Supports various connection types including Wi-Fi, Bluetooth, and USB for ELM327 and STN1170/STN2120 adapters.
• Android Auto Integration: Provides dedicated dashboards for performance metrics and trip information, enhancing the driving experience.
• Data Logging: Automatically records trip data, enabling users to review historical telemetry at any time
• Configurable views - The application offers few different kind of gauges which can visualize telemetry in the real-time, e.g: Boost, MAF, OIL temp
• Vehicle Profiles: Allows creation of customizable profiles with vehicle-specific settings and PID configurations.

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📊 Data Analysis & Logging

The application includes native integration with the ObdGraphsLogViewer project. This integration allows users to:

• Export Telemetry Logs: Save detailed session data from the mobile app in the Google Drive.
• Online Log Visualization: Utilize the specialized ObdGraphsLogViewer to analyze logs on a larger screen, enabling deep-dive performance reviews and trend analysis.

🔄 How to Sync Data between Mobile App and Log Viewer

To analyze your vehicle's performance on a larger screen, follow these steps to sync your data:

1. Enable Recording: Within the ObdGraphs mobile app, ensure that data logging is active during your drive. The app automatically saves trip data to your local storage.
2. Upload to Cloud: Navigate to the synchronization settings in the app and use the Cloud Synchronization feature to upload your recorded trip logs directly to your Google Drive.
3. Launch Analyzer: Visit the Online Log Analyzer on your desktop.
4. Analyze: Connect your Google Drive account within the web analyzer to instantly access and visualize your uploaded logs.

For a detailed video walkthrough of this process, refer to the official tutorial: ObdGraphs - Online Log Analyzer (YouTube).

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🔗 Official Resources

| Resource | Link | | :--- | :--- | | Official Website | https://my-giulia.com/ | | Online Log Analyzer | my-giulia.com/#analyzer | | Google Play Store | Download ObdGraphs | | GitHub (Log Viewer) | ObdGraphsLogViewer Project |

Note: For the best performance and highest data sampling rates, the use of high-quality STNxxxx based adapters is recommended.

Template App

This application can serve as a template to support various vehicles, each with its own set of custom PIDs. Example for such use-case can be found here

Developer-Friendly Aspects

• Open Source: Licensed under Apache 2.0, encouraging community contributions and modifications.
• Modular Architecture: The codebase is organized into distinct modules (e.g., datalogger, screen_renderer, automotive), promoting maintainability and scalability.
• Custom PID Integration: Supports the addition of new PIDs through external JSON configurations, enabling adaptability to various vehicle models.

YouTube overview video (brake-boosting assistance)

Views

Application offers few configurable screens which visualize vehicle telemetry data.

Android Auto (alerts emitted when upper threshold breached)

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Android Auto (Performance Dashboard)

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Android Auto (Trip Info Dashboard)

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Android Auto (Giulia Renderer)

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Android Auto (Gauge Renderer)

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Mobile

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Tablet

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Road map

• Performance optimization
• Support for PIDs creation through application

Instructions

• Adding new PIDs to query and displaying on AA virtual screen
• Change vehicle profile