OBD2 Data Logging Software: The Expert Guide for 2024

Do you want to unlock the hidden insights within your car’s data?

This comprehensive guide dives deep into Obd2 Data Logging Software, explaining its benefits, applications, and how to choose the right tools. Whether you’re a car enthusiast, mechanic, OEM, or fleet manager, understanding OBD2 data logging can revolutionize how you interact with vehicle data. Discover how to record, visualize, and utilize your car’s OBD2 data with ease, and learn why the CANedge stands out as a powerful solution for advanced users seeking 100% data control and open-source flexibility.

Watch our 4-minute introductory video to quickly grasp the essentials of OBD2 data logging!

Understanding OBD2 Data Logging: How It Works

Let’s begin with a recap of OBD2 basics. On-Board Diagnostics II (OBD2) is a standardized system in modern vehicles that provides access to a wealth of parameters – known as OBD2 PIDs. These PIDs offer valuable insights into your car’s performance and health, and can be easily recorded and decoded across most vehicles.

OBD2 data logging is a straightforward 3-step process:

Configuration: Set up your OBD2 logger with the specific OBD2 PIDs you wish to record.
Connection: Connect the logger to your vehicle’s OBD2 port using an OBD2 adapter.
Data Extraction & Decoding: After logging, extract the data from the SD card and decode it using free software or APIs.

For detailed instructions, refer to our FAQs below or our comprehensive guides:

CLX000 OBD2 guide
CANedge OBD2 guide

Top 4 Benefits of OBD2 Data Logging Software

Why should you use OBD2 data logging software? Here are four key advantages:

1. Driver, Vehicle, and Part Optimization

OBD2 data empowers you to monitor and refine driving habits, optimize fuel efficiency, and even fine-tune your vehicle’s performance. For Original Equipment Manufacturers (OEMs), OBD2 logging is invaluable for analyzing the real-world performance of prototype components under diverse driving conditions. This data-driven approach allows for iterative improvements and benchmarking against existing parts.

2. Enhanced Diagnostics for Intermittent Issues

Diagnosing rare or intermittent car problems can be incredibly challenging, especially when they don’t manifest during service appointments. OBD2 data logging bridges this gap by capturing vehicle data continuously while driving. When an issue occurs, you can pinpoint the exact moment in the logged data and analyze the surrounding parameters to effectively troubleshoot the root cause. This is especially useful for capturing transient faults that leave no lasting error codes.

3. Streamlined Car Fleet Management

For fleet managers, OBD2 data logging offers a powerful suite of tools for optimizing operations. OBD2-based telematics systems enable comprehensive driver behavior analysis, leading to potential fuel cost reductions through improved driving habits. Furthermore, proactive monitoring of vehicle health via OBD2 data can minimize breakdowns and downtime, enhance compliance, and aid in dispute resolution. OBD2 data is also crucial for implementing predictive maintenance strategies, ensuring vehicles are serviced before critical failures occur.

4. Unparalleled Data Control and Custom Integration

Unlike many closed-system OBD2 solutions, using an OBD2 data logger like CANedge provides complete control over your data. You record raw time-series data that can be accessed via SD card or automatically uploaded to your own server using WiFi or cellular connectivity. This open architecture facilitates seamless custom integrations through open APIs, empowering you to build bespoke applications and dashboards tailored to your specific needs. You are not locked into proprietary platforms and can process and visualize your data your way.

Which of these benefits align with your OBD2 data logging objectives? Contact us for a free consultation and explore how OBD2 data logging software can work for you.

Introducing the CANedge OBD2 Data Logger

The CANedge series of CAN bus data loggers is perfectly suited for OBD2 data logging, particularly for fleet telematics applications. Offering optional GPS/IMU, WiFi, and 3G/4G capabilities, CANedge provides a robust and versatile platform.

PLUG & PLAY: Start logging data right out of the box. CANedge operates standalone and can seamlessly connect your vehicles to your server infrastructure.

PRO SPECS: Featuring extractable SD card storage (8-32 GB), dual CAN/LIN channels, CAN FD support, zero data loss, 50 µs RTC, and error frame logging, CANedge delivers high-performance data acquisition. It supports the industry-standard MF4 format.

COMPACT & RUGGED: With dimensions of just 8 x 5 x 2 CM and a robust aluminum enclosure, CANedge is designed for demanding automotive environments. It offers 100G shock resistance, 5+ LEDs for status indication, and configurable 5V power output on CH2.

WIFI/LTE CONNECTIVITY: Push your OBD2 data wirelessly via WiFi or 3G/4G to your designated server. Benefit from end-to-end security and over-the-air (OTA) updates for seamless management.

GNSS + 3D IMU: Integrated GPS/IMU provides accurate location, speed, distance, acceleration, orientation, and more through advanced sensor fusion.

INTEROPERABLE & OPEN SOURCE: Leverage free, open-source software and APIs. Convert MF4 data to ASC/CSV, utilize DBC support, Python libraries, and browser-based dashboards for comprehensive data processing and visualization.

Learn More About CANedge

Software Example: Create Custom OBD2 Dashboards

CANedge simplifies the creation of free, customized browser dashboards for visualizing your OBD2 data and setting up alerts. Combine OBD2 data with GPS/IMU data using a CANedge with GNSS/IMU for richer insights.

Explore our online playground or delve into our dashboard introduction:

Online Playground
Dashboard Introduction

Download the ‘OBD2 Data Pack’

Ready to work with real OBD2 data? Our ‘OBD2 Data Pack’ is available for download and includes:

Our comprehensive OBD2 DBC file
25+ additional car DBCs (reverse-engineered for various makes and models)
Over 100 MB of real-world data collected from 10+ different cars

Download OBD2 Data Pack Now

OBD2 Data Logging Software Use Case Examples

Let’s examine practical applications of CANedge for OBD2 data logging:

OEM Field Testing of Vehicle Parts

Do you need to log CAN/OBD2 data from vehicles in real-world operating conditions?

For OEMs conducting late-stage field trials of prototype equipment, CANedge1 is the perfect solution. Its compact size, plug-and-play nature, and easy pre-configuration capabilities make it ideal for collecting OBD2 and CAN data from multiple vehicles over extended periods. Data can be periodically retrieved and analyzed using industry-standard CAN tools or the free asammdf GUI/API.

Learn more about CANedge1

Vehicle Telematics (OBD2 + GNSS/IMU + 3G/4G)

Are you looking to implement OBD2 telematics for your on-road vehicle fleets?

The CANedge3 is designed for seamless OBD2 telematics deployments. Utilizing your own SIM card, CANedge3 can wirelessly upload recorded OBD2 data via 3G/4G, providing near real-time data transfer from vehicles to your cloud server. Automated data processing is facilitated by open APIs (including OBD2 DBC decoding), and devices can be managed remotely with over-the-air updates. The integrated GPS/IMU enriches your data with location, speed, trip distance, and motion data.

Explore CANedge3 Features

Case Study: OBD2/CAN Telematics Implementation

Discover how Volkswagen utilizes CANedge2 to log both OBD2 and raw CAN data to SD cards and automatically push data to their self-hosted server for in-depth analysis.

“The CANedge2 allowed us to get up and running quickly with flexible configuration options, and the support was exceptional!“

Read the Volkswagen Case Study
Explore 100+ Case Studies

Access OBD2 Data Samples from an Audi A4

Download OBD2 data samples recorded with CANedge to experience real-world data. You can also access our free, open-source OBD2 software to practice decoding raw OBD2 data yourself.

Raw OBD2 Data
Decoded OBD2 Data (Google Sheets)
Free OBD2 Software

Frequently Asked Questions (FAQ) About OBD2 Data Logging Software

The OBD2 protocol (SAE J1979) standardizes a wide range of vehicle data parameters that can be logged. However, it’s important to note that OBD2 support and available parameters vary between car makes, models, and years. Older vehicles often provide access to fewer parameters.

Here are some common OBD2 parameters frequently available:

Fuel system status
Engine load
Coolant temperature
Fuel trim
Fuel pressure
Intake manifold pressure
Engine RPM
Vehicle speed
Intake air temperature
MAF air flow rate
Throttle position
Air status
Oxygen sensor status
Runtime since engine start
Distance with MIL on
Fuel tank level input
System vapor pressure
Absolute load value
Hybrid battery pack life
Engine oil temperature
Engine fuel rate
Torque
VIN
Various DTCs

For in-depth information, consult the OBD2 PID Wiki page or the SAE J1979 standard.

To convert raw OBD2 data from a CANedge OBD2 data logger into understandable physical values (like km/h, RPM), you need a decoding database and appropriate OBD2 software.

We provide a 100% free OBD2 DBC file containing decoding rules for most standardized Mode 01 (Service 01) OBD2 PIDs, similar to those listed on the OBD2 PID Wiki page.

This OBD2 DBC file uses extended multiplexing for efficient OBD2 decoding. Learn more in our DBC intro and our OBD2 intro, where we explain interpreting raw CAN frames with OBD2 responses.

Load your raw OBD2 data and the OBD2 DBC file into our free software tools like asammdf or our OBD2 dashboard integrations. Visualize decoded OBD2 parameters like Speed, Engine Speed, MAF, and Fuel Level with ease.

This approach allows you to customize the OBD2 DBC file by adding proprietary OBD2 PIDs. You can also combine the OBD2 DBC with proprietary CAN DBC files for comprehensive CAN and OBD2 car data logging.

What is UDS?

The Unified Diagnostic Services protocol (UDS, ISO 14229-1) is a protocol for ECU communication in vehicles. UDS diagnostic tools send request messages on the CAN bus to retrieve information from specific ECUs. While OBD2 focuses on on-board diagnostics during vehicle operation, UDS is designed for off-board diagnostics when the vehicle is stationary.

How to Make UDS Requests over ISO-TP (ISO 15765-2)

Requesting OBD2 PIDs is simple: an OBD2 tool sends a CAN frame (OBD2 request), and the car responds with a single CAN frame if the PID is supported. UDS requests, however, may involve transport protocol requests. For example, UDS service 0x22 requests data by identifier, involving a multi-frame communication sequence:

A ‘UDS data logger’ sends a request frame specifying the service ID (SID) and data identifier (DID).
The car responds with a first frame containing SID, DID, message length, and initial payload.
The UDS logger sends a flow control frame to acknowledge the first frame.
The ECU sends consecutive frames with the remaining message payload.

Logging UDS data requires a tool capable of sending custom CAN frames and flow control frames. Software tools must then reconstruct multi-frame UDS responses to extract and decode the payload.

UDS and OBD2 Extended PIDs for Car Data Logging

UDS service IDs (SID) and data identifiers (DID) are sometimes combined into ‘extended OBD2 PIDs,’ such as 0x220101. Service 0x22 UDS requests can access vehicle data beyond standard OBD2 PIDs. For example, some electric vehicles provide State of Charge (SoC%) data via UDS service 0x22.

Using CANedge as a UDS Data Logger

CANedge can be configured to send UDS requests. This involves sending a request frame followed by a flow control frame within milliseconds to trigger the UDS response sequence. Log files with UDS responses can be analyzed in tools like CANalyzer (by converting MF4 data to Vector ASC) or processed using our free Python CAN bus API to, for example, push parameters to a Grafana UDS dashboard. Our github API examples include UDS response data and a UDS DBC file for decoding State of Charge (SoC%) from a Hyundai Kona EV. Learn more in our EV data logger article or contact us.

Will OBD2 Data Logging Work on My Car?

Most likely, yes. OBD2 has been mandatory in the USA since 1996 and in the EU (EOBD) since 2003.

However, OBD2 support and the availability of specific data parameters vary. Older cars may have limited support for real-time parameters. Some manufacturers are also restricting OBD2 data access. While most cars use CAN for OBD2 communication, older US cars (pre-2008) and some EU brands might use other protocols.

Check your OBD2 connector: For CAN logging, ensure your OBD2 connector has “metal pins” in pins 6 (CAN High) and 14 (CAN Low) – see our OBD2 connector illustration. If unsure, send us a picture.

Five OBD2 signal protocols exist:

ISO 15765 (CAN): Dominant, mandatory in US vehicles since 2008.
SAE J1850 (PWM): Ford standard.
SAE J1850 (VPW): General Motors standard.
ISO 9141-2: Chrysler and some EU/Asian vehicles.
ISO 14230 (KWP2000): Primarily EU manufacturers.

CANedge/CLX000 supports CAN-based OBD2. Contact us if you’re unsure about your car’s compatibility.

For a rough protocol check, use this resource: OBD2 compatibility (cars). See our OBD2 intro for basics.

With an OBD2 logger, you can also check supported Mode 01 OBD2 parameter IDs by requesting ‘Supported PIDs’ parameters (IDs 00, 20, 40, 60, 80, A0, C0). Analyze the response data bytes bit-by-bit (see Wikipedia OBD2 PID for details).

OBD2 vs. J1939 Data Logging

OBD2 data logging is typically used for cars and light trucks. For heavy-duty vehicles (trucks, tractors, excavators), J1939 data logging is generally required. J1939 is a standardized protocol for heavy-duty vehicles, enabling data decoding across brands. A J1939 DBC file is needed for decoding J1939 data. CANedge/CLX000 can function as J1939 data loggers as well.

Which CANedge/CLX000 Device is Best for OBD2 Data Logging Software?

Both CANedge and CLX000 series are suitable OBD2 data loggers.

For SD card logging, CANedge is recommended as the 2nd generation, optimized for logging. For auto-upload to your server, choose CANedge2 for OBD2 telematics and OBD2 dashboards.

For real-time OBD2 data streaming via USB to a PC, the CLX000 series, like CL2000, is ideal.

Can I Stream OBD2 Data in Real-Time?

Yes, the CLX000 series enables real-time streaming of raw CAN and OBD2 data via USB. See our OBD2 streaming intro.

Raw CAN Data vs. OBD2 Data Logging

Connecting a CAN logger like CANedge or CLX000 to your OBD2 port typically starts recording raw CAN bus data by default. This raw CAN data is used for in-vehicle communication.

OEMs might log raw CAN data and possess CAN databases (DBC files) for decoding. For non-OEMs, decoding raw CAN data involves car hacking and reverse engineering. Partial databases may be found online (e.g., opendbc).

For most users, OBD2 protocol is the primary data access method. Today, OBD2 communication is mostly CAN-based and “on-request.” OBD2 logging involves sending custom CAN frames to request specific data, which the car may or may not respond to, depending on OEM implementation.

Types of OBD2 Devices

The OBD2 device market is vast. Here are main categories:

OBD2 Scanners: Used by mechanics for diagnostics, reading and clearing diagnostic trouble codes (DTCs). Bluetooth and WiFi OBD2 scanners are available for smartphone access.

OBD2 Dongles: Small, low-cost, consumer-focused Bluetooth OBD2 readers, often using ELM327 microcontrollers. They offer real-time data via smartphone apps but limited flexibility.

OBD2 Data Loggers: Record OBD2 time-series data to SD cards in standalone mode. Data is extracted later via USB or SD card. CANedge1 is an example.

OBD2 WiFi/LTE Loggers: OBD2 data loggers with WiFi or 3G/4G data transfer, like CANedge2/CANedge3. Ideal for OBD2 telematics and OBD2 dashboards for fleet data visualization.

OBD2 Interfaces: CAN interfaces that stream OBD2 data in real-time to a PC via USB, such as CLX000 for USB streaming of OBD2 data using SavvyCAN.

Will OBD2 Logger Drain My Car Battery?

In most cases, no.

Typically, CANedge turns on/off with the ignition as the OBD2 port often uses IGN power. However, some vehicles wire OBD2 power directly to the battery, potentially keeping CANedge powered even when the car is off. CANedge power draw is minimal (<2W).

Check if your logger turns off by observing LEDs 15-20 minutes after turning off the car. If LEDs are off, CANedge is off.

If CANedge stays on and the vehicle is off for extended periods, disconnect the device. Alternatively, configure CANedge to start/stop based on CAN data patterns indicating ignition status. A DB9-DC splitter cable and cigarette receptacle adapter can power CANedge via the ignition-linked cigarette power supply. See CANedge Docs for details.

Can I Log GPS Data with OBD2 Data?

While cars may have built-in GPS, accessing this data via OBD2 or proprietary CAN data is usually not possible. Use a CANedge with GNSS/IMU to record synchronized GNSS/IMU data alongside CAN/OBD2 data.

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