The growing adoption of connected vehicles and edge analytics has increased the need to efficiently collect and interpret diagnostic information directly from automotive networks. The ISO 15765 protocol stack enables communication between a Telematics device and vehicle Electronic Control Units (ECUs) over a CAN network, allowing critical vehicle data to be retrieved and processed for diagnostics and analytics.
iWave has developed an ISO 15765 protocol stack that provides a flexible API for handling diagnostic communication over ISO 15765-based CAN networks. The stack is designed to simplify protocol integration while providing flexibility for application-specific requirements in OBD-II and telematics control units.
ISO 15765 Protocol Stack: Communication with Vehicle ECUs
ISO 15765 defines diagnostic communication over Controller Area Network (CAN), enabling diagnostic messages to be exchanged between vehicle ECUs and external diagnostic equipment.
iWave’s ISO 15765 stack is developed using ANSI C source code and supports the specifications required for ISO 15765-based vehicle diagnostics. It also supports the four variants of ISO 15765-4 CAN used for OBD-II communication.
The stack supports both 11-bit and 29-bit CAN identifiers and standard communication baud rates such as 250 kbps and 500 kbps. This allows the Telematics device to communicate with different vehicle architectures and retrieve diagnostic information from the vehicle network.
Vehicle Data Acquisition
The protocol stack establishes communication with the vehicle ECU and enables the TCU to request and receive diagnostic parameters.
The retrieved information can include parameters such as:
- Vehicle speed
- Engine-related parameters
- Emission-related information
- Diagnostic Trouble Codes (DTCs)
- Manufacturer-specific vehicle data
Once the data is received, the stack handles message processing and decoding, allowing application software to use the information for diagnostics, monitoring, and analytics.
This capability enables vehicle data to be processed closer to the source, supporting edge-based analytics and faster identification of abnormal conditions.
ISO 15765 Protocol Stack: Key Features
The iWave ISO 15765 protocol stack provides several features for automotive diagnostic applications:
- ANSI C-based implementation for flexible software integration
- Support for four ISO 15765-4 CAN variants
- 11-bit and 29-bit CAN identifier support
- Support for 250 kbps and 500 kbps baud rates
- Multi-frame message filtering
- Customizable protocol-stack features
- Access to manufacturer-specific vehicle data
- API-based integration for application development
- Support for diagnostic data acquisition and decoding
These capabilities provide developers with a configurable software foundation for implementing ISO 15765-based diagnostic functionality in OBD-II and telematics products.
Customization and Integration
Different vehicle platforms and end applications can require different diagnostic features. iWave therefore provides customization of the ISO 15765 stack according to application requirements.
Customization and integration can include protocol-stack configuration, feature modification, application integration, and optimization of software components. This approach can help reduce software development effort and accelerate the deployment of customized OBD-II and telematics solutions.
The stack can also be integrated with customer-specific applications and cloud platforms, enabling vehicle data to move from the CAN network to higher-level analytics systems.
Enabling Edge and Cloud Analytics
When integrated into a Telematics Control Unit (TCU), the ISO 15765 stack enables vehicle diagnostic information to be collected directly from the CAN network.
For example, diagnostic data and DTCs can be decoded by the device and forwarded to a cloud-based application for further analysis. Analytics platforms can then use this information to identify abnormal operating conditions, support remote diagnostics, monitor vehicle performance, and improve maintenance strategies.
Processing selected data at the edge can also reduce the amount of raw vehicle information that needs to be transmitted to the cloud while enabling faster local responses.
Supporting Heavy-Duty Vehicle Diagnostics
In addition to ISO 15765, iWave’s OBD-II solution supports the SAE J1939 protocol stack for applications involving heavy-duty vehicles.
SAE J1939 enables communication and diagnostics across heavy-duty vehicle networks, making the combination of ISO 15765 and J1939 suitable for a broader range of automotive and commercial vehicle applications.
Together, these protocol capabilities provide a flexible software foundation for vehicle diagnostics, telematics, fleet monitoring, and connected mobility applications.
iWave’s ISO 15765 Protocol Stack Expertise
iWave brings expertise in embedded software, automotive communication protocols, and telematics solutions to help customers develop customized vehicle-data acquisition and diagnostic systems.
From protocol-stack development and integration to application-level customization, iWave can provide software engineering support for OBD-II and telematics applications requiring reliable CAN-based vehicle communication.
The ISO 15765 protocol stack provides an effective software layer for communicating with vehicle ECUs over CAN and retrieving diagnostic information from Telematics device.
With support for multiple CAN identifiers, ISO 15765-4 variants, multi-frame messages, customizable features, and integration with cloud-based applications, the stack can serve as a foundation for connected vehicle diagnostics and edge analytics.
Combined with SAE J1939 support, iWave’s automotive protocol expertise enables developers to build flexible diagnostic and telematics solutions for passenger vehicles, commercial vehicles, and heavy-duty applications.
For more information, visit www.iwave-global.com or contact mktg@iwave-global.com
