Do you want to record OBD2 data from your car and are looking for free solutions?
This guide introduces you to OBD2 data logging, explores the key benefits, and presents practical use cases. We’ll also show you how to leverage Free Obd2 Data Logging Software to process and visualize your car’s data, putting you in full control. You can even download sample OBD2 data from an Audi A4 (including speed, RPM, and more) to get started right away.
Unlike many OBD2 dongles and scanners that lock you into proprietary ecosystems, the CANedge empowers you to log and analyze your vehicle data your way – all thanks to its compatibility with 100% free software and APIs, including browser-based dashboards.
Visualize your OBD2 data in real-time using free, open-source browser dashboards.
Read on to discover why the CANedge is an excellent choice for CAN and OBD2 data logging and telematics, especially when combined with free OBD2 data logging software.
Quick Tip: Watch our 4-minute introductory video to get a visual overview!
Article Contents:
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Understanding OBD2 Data Logging
Let’s quickly recap the fundamentals of OBD2 (On-Board Diagnostics II). OBD2 is a standardized system in modern vehicles that provides access to a wealth of parameters – known as OBD2 PIDs (Parameter IDs). These PIDs cover a wide range of engine and vehicle data that can be recorded and easily interpreted across most car makes and models.
Logging OBD2 data is a straightforward process, generally involving these three steps when using a dedicated OBD2 data logger and free OBD2 data logging software:
- Configuration: Set up your OBD2 logger by selecting the specific OBD2 PIDs you wish to record. This is often done through a simple interface in the free OBD2 data logging software provided with your logger.
- Connection: Connect the OBD2 logger to your car’s OBD2 port using an OBD2 adapter. Once connected, the logger starts capturing data as you drive.
- Extraction & Decoding: After your drive, extract the recorded data from the logger (typically via an SD card). Then, utilize free OBD2 data logging software to decode the raw data into human-readable values.
For more detailed instructions, refer to our guides:
CLX000 OBD2 guide CANedge OBD2 guide
The OBD2 data logging process: Configure your logger, connect to your car’s OBD2 port, and use free software to decode the recorded data.
Top 4 Benefits of OBD2 Data Logging with Free Software
The power of OBD2 logging lies in its ability to unlock valuable insights from virtually any car. Here are four key advantages of using OBD2 data logging, especially when paired with free OBD2 data logging software:
OBD2 data logging enables driver behavior analysis, vehicle performance tuning, and OEM part benchmarking.
1. Driver, Vehicle, and Part Optimization
OBD2 data provides a wealth of information for optimizing various aspects of vehicle operation. For instance, you can monitor and refine driving habits to improve fuel efficiency or identify areas for smoother driving. Car enthusiasts can use the data to fine-tune engine parameters for enhanced performance. Furthermore, Original Equipment Manufacturers (OEMs) can leverage OBD2 logs to assess the real-world performance of prototype parts under diverse driving conditions. All of this analysis becomes accessible with free OBD2 data logging software that can process and visualize the collected data.
Diagnose intermittent and rare car issues by logging OBD2 data during driving and analyzing it later with free software.
2. Rare Issue Diagnostics
Troubleshooting intermittent or infrequent car problems can be incredibly challenging. These issues often occur sporadically while driving, making it difficult to pinpoint the cause during static diagnostic checks at a repair shop. OBD2 data logging offers a solution by allowing you to record vehicle parameters continuously while driving. When a rare issue occurs, you can analyze the OBD2 data captured around the event timeframe using free OBD2 data logging software. This retrospective analysis can reveal crucial insights into the conditions leading up to the problem, aiding in effective diagnosis and resolution.
Fleet management benefits from OBD2 data logging, including driver behavior monitoring, fuel cost reduction, and predictive maintenance, all supported by free software solutions.
3. Car Fleet Management
For businesses managing vehicle fleets, OBD2 telematics provides a powerful tool for optimizing operations. By implementing OBD2 data logging across a fleet and utilizing free OBD2 data logging software for analysis, fleet managers can gain valuable insights into driver behavior, fuel consumption patterns, and vehicle health. This data can be used to:
- Reduce fuel costs: Identify inefficient driving habits and optimize routes.
- Minimize breakdowns: Implement predictive maintenance by monitoring vehicle health parameters.
- Improve driver safety: Track driving behavior and encourage safer practices.
- Ensure compliance: Monitor vehicle usage for regulatory adherence.
- Handle disputes: Provide data-backed evidence in case of accidents or disagreements.
Furthermore, integrating OBD2 data with predictive maintenance strategies can significantly reduce downtime and maintenance costs.
Open and interoperable OBD2 data logging systems with free software provide data control and customization options.
4. Data Control & Custom Integration with Open Source Software
Choosing an OBD2 logger that emphasizes data control and open integration is crucial for maximizing flexibility. With an OBD2 WiFi logger like the CANedge, you record raw time-series data that you fully own. This data can be extracted via SD card or automatically uploaded to your own server. This open approach unlocks seamless custom integration through open APIs and compatibility with free OBD2 data logging software. You avoid vendor lock-in and can tailor your data processing and visualization workflows to your specific needs using readily available, free OBD2 data logging software and tools.
Which of these benefits align with your OBD2 logging objectives? Feel free to contact us for a free consultation to discuss your specific use case!
Introducing the CANedge OBD2 Data Logger
The CANedge CAN bus data logger is a versatile device, ideally suited for OBD2 data logging and fleet telematics applications. It offers optional GPS/IMU, WiFi, and/or 3G/4G connectivity, expanding its capabilities for advanced telematics solutions. Crucially, it’s designed to work seamlessly with free OBD2 data logging software.
Plug & Play OBD2 Data Logging: The CANedge offers out-of-the-box logging and easy integration with your server.
PLUG & PLAY: The CANedge is designed for ease of use. It works as a standalone device, logging data directly to an SD card. It’s also engineered for straightforward integration with your server infrastructure.
Professional Specifications: The CANedge boasts high-performance specs, including large SD card capacity, dual CAN/LIN channels, and precise time-stamping.
PRO SPECS: The CANedge is built for professional applications, featuring extractable SD card storage (8-32 GB), dual CAN/LIN channels, CAN FD support, zero data loss recording, microsecond-precision RTC, and error frame logging. It records data in the industry-standard MF4 format.
Compact and Rugged Design: The CANedge is small, robust, and designed for demanding automotive environments.
COMPACT: Measuring only 8 x 5 x 2 cm, the CANedge is incredibly compact. Its rugged aluminum enclosure and 100G shock resistance ensure durability in demanding automotive environments. It also features 5+ LEDs for status indication and configurable 5V power output on channel 2.
Wireless Connectivity: The CANedge offers WiFi and optional LTE/4G for seamless data upload to your server and remote management.
WIFI/LTE: The CANedge supports data push via WiFi and optional 3G/4G to your server, enabling real-time data access for telematics applications. It prioritizes security with end-to-end encryption and supports Over-The-Air (OTA) updates for remote management.
Integrated GNSS/IMU: Optional built-in GPS/IMU provides rich location and motion data for advanced telematics applications.
GNSS + 3D IMU: Select CANedge models include a built-in GPS/IMU, offering 3x accuracy through sensor fusion. This adds valuable location, speed, distance, acceleration, and attitude data to your logs, enriching your OBD2 data for telematics and analysis.
Open and Interoperable: The CANedge ecosystem is built on free, open-source software and APIs, ensuring flexibility and customization.
INTEROPERABLE: The CANedge ecosystem thrives on interoperability with free open-source software and APIs. It supports MF4 and MDF4 file formats, conversion to ASC/CSV, DBC file integration, Python libraries, and browser-based dashboards – all part of the free OBD2 data logging software suite.
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OBD2 Dashboard Example with Free Software
With the CANedge and free OBD2 data logging software, creating custom browser dashboards to visualize your OBD2 data and set up alerts is remarkably easy.
For enhanced insights, you can combine OBD2 data with GPS/IMU data by using a CANedge with integrated GNSS/IMU.
Explore our online playground to see a live dashboard in action or delve deeper into our introductory guide.
playground dashboards intro
Get Your Free ‘OBD2 Data Pack’
Want to experience working with real OBD2 data and free OBD2 data logging software?
Download our complimentary ‘data pack’ which includes:
- Our OBD2 DBC file for easy decoding.
- 25+ car DBC files (reverse-engineered for various makes).
- 100+ MB of real-world OBD2 data collected from 10+ different cars.
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Practical Use Case Examples
Let’s explore some concrete examples of how the CANedge can be effectively used for OBD2 data logging in real-world scenarios, always leveraging the power of free OBD2 data logging software for analysis.
OEM Field Testing of Vehicle Parts
Do you need to log CAN/OBD2 data from vehicles in real-world operating conditions?
OEMs often conduct late-stage field tests of prototype equipment, requiring extensive OBD2 and CAN data collection from multiple vehicles over extended periods (e.g., months). The CANedge1 is ideally suited for this purpose due to its compact size, plug-and-play simplicity, and easy pre-configuration. Data can be collected periodically and subsequently analyzed using your preferred CAN tools or the free asammdf GUI/API – a powerful free OBD2 data logging software option.
canedge1
OEM field testing with OBD2 data loggers allows for real-world performance analysis of prototype vehicle components.
Vehicle telematics for fleet management utilizes OBD2 data logging for enhanced operational insights.
Vehicle Telematics (OBD2 + GNSS/IMU + 3G/4G)
Are you looking to establish OBD2 telematics for on-road vehicle fleets?
The CANedge3 excels in OBD2 telematics applications. It can wirelessly upload recorded OBD2 data via 3G/4G using your own SIM card, enabling near real-time data transfer from vehicles to your cloud server. The OBD2 data can be automatically processed using open APIs, which include OBD2 DBC decoding support. The CANedge3 devices can be managed remotely with over-the-air updates. Furthermore, the integrated GPS/IMU in the CANedge3 adds valuable contextual data such as position, speed, trip distance, and acceleration to your OBD2 logs, enriching your telematics solution. All of this data can be efficiently managed and visualized with free OBD2 data logging software compatible with the CANedge ecosystem.
canedge3
Case Study: OBD2/CAN Telematics Implementation
Discover how Volkswagen leverages the CANedge2 to log both OBD2 and raw CAN data to an SD card and automatically push this data to their self-hosted server for in-depth analysis. They benefit from the CANedge’s robust configuration options and seamless integration with their systems, all while utilizing free OBD2 data logging software for data processing.
“The CANedge2 enabled us to get up and running incredibly quickly with robust configuration options – and the support was outstanding!”
learn more 100+ case studies
OBD2 Telematics Setup: Wireless OBD2 data logging for vehicle fleets with CANedge and free software integration.
Sample OBD2 Data from an Audi A4
To help you get hands-on experience, we provide sample OBD2 data recorded with the CANedge from an Audi A4.
You can download these samples, along with free open-source OBD2 software, and explore the process of decoding raw OBD2 data yourself.
Raw OBD2 Data Decoded OBD2 Data (Google Sheet) Free OBD2 Software
Frequently Asked Questions (FAQ) about Free OBD2 Data Logging Software
What kind of OBD2 data can I log?
The OBD2 protocol (SAE J1979) defines a standardized set of vehicle data parameters that can be logged from your car. However, the specific OBD2 data supported varies between car models, with older cars often supporting fewer parameters.
Here are some common standard OBD2 parameters that are frequently available:
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Fuel system status
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Engine load
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Coolant temperature
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Fuel trim
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Fuel pressure
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Intake manifold pressure
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Engine RPM
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Vehicle speed
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Intake air temperature
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MAF air flow rate
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Throttle position
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Air status
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Oxygen sensor status
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Runtime since engine start
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Distance with MIL on
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Fuel tank level input
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System vapor pressure
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Absolute load value
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Hybrid battery pack life
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Engine oil temperature
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Engine fuel rate
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Torque
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VIN (Vehicle Identification Number)
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Various DTCs (Diagnostic Trouble Codes)
For more detailed information, consult the OBD2 PID Wiki page or the SAE J1979 standard.
How do I decode raw OBD2 data using free software?
To convert raw OBD2 data from a CANedge OBD2 data logger into meaningful physical values (e.g., km/h, RPM), you need a database of decoding rules and suitable free OBD2 data logging software.
We provide a 100% free OBD2 DBC file that contains decoding rules for the majority of standardized Mode 01 (Service 01) OBD2 PIDs, based on resources like the OBD2 PID Wiki page.
This OBD2 DBC file utilizes extended multiplexing for efficient OBD2 decoding. To learn more about DBC files, see our DBC intro. For understanding how raw CAN frames relate to OBD2 responses, refer to our OBD2 intro.
You can load your raw OBD2 data and the free OBD2 DBC file into our free software tools like asammdf or our OBD2 dashboard integrations. This allows you to visualize decoded OBD2 parameters such as Speed, Engine Speed, MAF, and Fuel Level.
A key advantage of this approach is the ability to easily modify the OBD2 DBC to incorporate proprietary OBD2 PIDs specific to your vehicle. You can also combine the OBD2 DBC with proprietary CAN DBC files to enable comprehensive logging of both CAN and OBD2 car data.
What is UDS and how does it relate to OBD2 data logging?
Unified Diagnostic Services (UDS) (ISO 14229-1) is another communication protocol used in automotive ECUs. While OBD2 is designed for on-board diagnostics during vehicle operation, UDS is primarily intended for off-board diagnostics when the vehicle is stationary. However, UDS can also be used to access extended parameters beyond standard OBD2 PIDs, and free OBD2 data logging software may support UDS data processing.
Can I use the CANedge as a UDS data logger?
Yes, the CANedge can be configured to send UDS requests. This involves sending request frames and managing flow control frames to handle multi-frame UDS responses. Log files containing UDS responses from the CANedge can be analyzed using tools like CANalyzer (after converting MF4 data to Vector ASC) or processed with our free Python CAN bus API. Our github API examples include UDS response data and a UDS DBC file for decoding parameters like State of Charge (SoC%) from electric vehicles. For further information, see our EV data logger article or contact us.
Will OBD2 data logging work with my car?
Most likely, yes. OBD2 has been mandatory in the USA since 1996 and in the EU since 2003 (EOBD). However, OBD2 support and available parameters vary by vehicle model and year. Older cars may offer limited OBD2 data. Some manufacturers are also restricting OBD2 data access. While most cars use CAN for OBD2, older US cars or some EU brands might use different protocols.
How do I check if my car supports CAN-based OBD2?
Inspect your car’s OBD2 connector. For CAN logging, ensure “metal pins” are present in pins 6 (CAN High) and 14 (CAN Low). Refer to our OBD2 connector illustration (red pins). If unsure, send us a picture for verification.
What OBD2 protocols are supported by CANedge/CLX000?
The CANedge/CLX000 supports CAN-based OBD2 (ISO 15765), the dominant protocol and mandatory in US vehicles since 2008. If you’re unsure about your car’s compatibility, contact us.
How can I check OBD2 compatibility for my car model?
You can use online resources like OBD2 compatibility (cars) for a rough protocol check. For a basic understanding of OBD2, see our simple intro to OBD2.
Can I use an OBD2 logger to check supported PIDs in my car?
Yes. By requesting ‘Supported PIDs’ parameters (IDs 00, 20, 40, 60, 80, A0, C0) with an OBD2 logger, you can log the responses and analyze the data bytes to determine which PIDs your car supports. Consult the Wikipedia OBD2 PID article for details on interpreting the responses.
Can I log data from heavy-duty vehicles with an OBD2 logger?
OBD2 is primarily used for cars and light trucks. For heavy-duty vehicles like trucks, tractors, and excavators, the J1939 protocol is typically used. You’ll need a J1939 DBC file and a J1939 data logger like the CANedge/CLX000 for these vehicles.
Which CANedge/CLX000 logger is best for OBD2 data logging?
For SD card logging, the CANedge series is recommended as it’s optimized for logging and is the 2nd generation of the CLX000. For auto-uploading log files to your server, the CANedge2 is ideal for OBD2 telematics and OBD2 dashboards. If you need real-time OBD2 data streaming via USB to a PC, the CLX000 series, such as the CL2000, is suitable. Contact us for personalized recommendations.
Can I stream OBD2 data in real-time?
Yes, the CLX000 series allows real-time streaming of raw CAN and OBD2 data via USB. See our OBD2 streaming intro.
What’s the difference between raw CAN data and OBD2 data logging?
Connecting a CAN logger like CANedge/CLX000 to your OBD2 port will, by default, record raw CAN bus data in most cars. This raw data is used for internal car communication. OEMs can decode this raw data with proprietary CAN databases (DBC files). For non-OEMs, decoding raw CAN data often involves reverse engineering. OBD2 data, in contrast, is a standardized protocol available “on-request.” OBD2 loggers send specific CAN frames to request data, and the car responds if the PID is supported. For most users outside of vehicle manufacturers, OBD2 is the primary accessible data source, and free OBD2 data logging software is designed to work with this data.
What are the different types of OBD2 devices?
- OBD2 Scanners: Used by mechanics for diagnostics, reading and clearing trouble codes (DTCs). Bluetooth and WiFi versions exist for smartphone access.
- OBD2 Dongles: Small, low-cost Bluetooth OBD2 readers for consumers, often used with smartphone apps for real-time data viewing. Typically ELM327-based.
- OBD2 Data Loggers: Standalone devices that record OBD2 time-series data to SD cards for later analysis with free OBD2 data logging software. CANedge1 is an example.
- OBD2 WiFi/LTE Loggers: OBD2 data loggers with WiFi or 3G/4G for data transfer to servers, enabling telematics and remote data access. CANedge2/CANedge3 are examples.
- OBD2 Interfaces: CAN interfaces that also stream OBD2 data in real-time to a PC via USB. CLX000 series is an example.
Will an OBD2 logger drain my car battery?
In most cases, no. CANedge typically turns on/off with the ignition as the OBD2 port often uses the IGN power supply. However, in some vehicles, the OBD2 port might be directly battery-powered. CANedge power drain is minimal (<2W). You can check if your logger turns off by observing the LEDs after turning off your car for 15-20 minutes. If needed, you can disconnect the device or configure CANedge to toggle transmit based on vehicle CAN data patterns. Alternatively, use a DB9-DC splitter cable and cigarette receptacle adapter to power the logger via the ignition-linked cigarette power supply.
Can I log GPS data with an OBD2 logger?
While your car might have a built-in GPS, accessing this data via OBD2 or raw CAN is usually not possible. For GPS logging, use a CANedge with integrated GNSS/IMU to record GPS/IMU data synchronized with your OBD2 data.
Ready to start logging OBD2 data from your car with free software?
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