As vehicles across the spectrum from passenger cars to heavy-duty trucks become more connected and software-defined, a robust and flexible telematics and diagnostics framework become essential. To address diverse vehicle types and use cases, iWave supports an integrated protocol stack combining ISO 15765, SAE J1939 and Unified Diagnostic Services (UDS) enabling seamless telemetry, analytics, and ECU diagnostics across light-, medium-, and heavy-duty vehicles.
This unified approach ensures OEMs, fleet operators, and solution providers can deploy a single, scalable telematics platform regardless of vehicle type or communication protocol.
Overview of the Protocols
ISO 15765 — For Passenger and Light-Duty Vehicles
ISO 15765 defines how ECUs in modern passenger vehicles exchange diagnostic and operational data over the CAN bus. iWave’s ISO 15765 stack supports all standard variants (including ISO 15765-4 CAN), with both 11-bit and 29-bit CAN identifiers, and standard CAN baud rates (e.g. 250 kbps, 500 kbps).
Using this stack, telematics gateways can read real-time data such as speed, engine parameters, emission data, Diagnostic Trouble Codes (DTCs), and other manufacturer-specific vehicle data enabling OBD-II compliant diagnostics, remote vehicle health monitoring, and integration with cloud analytics.
SAE J1939 — For Heavy-Duty and Commercial Vehicles
SAE J1939 is the de-facto standard for communication in heavy-duty vehicles, buses, trucks, agricultural and off-road machinery. It builds on the high-speed CAN bus (ISO 11898-1), but adds a structured application layer defining parameter group numbers (PGNs), signal formats, extended 29-bit identifiers, and standardized messages for engine data, fuel consumption, vehicle status, and diagnostics.
iWave’s J1939 Protocol Stack is platform and OS-agnostic, supports all standard baud rates, multi-frame message handling, and is suitable for both on-road and off-road, heavy-duty environments.
Through J1939, telematics gateways and fleet management systems can gather comprehensive data engine speed, fuel usage, load status, diagnostics, and more enabling advanced fleet analytics, preventive maintenance, and operational efficiency.
UDS (Unified Diagnostic Services) — Cross-Vehicle Diagnostics & Firmware Management
UDS, defined under ISO 14229, provides a standard diagnostic application layer that works over underlying transport protocols (such as ISO 15765-CAN or DoIP / Ethernet). iWave’s UDS Protocol Stack supports both client (tester) and server (ECU) implementations on CAN (UDSonCAN) as well as IP (UDSonIP).
With UDS, diagnostic tools and telematics units can perform a broad range of tasks: read ECU data, collect and interpret DTCs, control I/O, trigger routines, and even perform ECU firmware updates all in a standardized way, irrespective of vehicle make or underlying communication network.
Why a Unified Protocol Stack Matters
By combining ISO 15765, SAE J1939, and UDS stacks in one platform, iWave delivers a powerful, future ready foundation for telematics and connected vehicle solutions. Here’s why it matters:
- Fleet & Vehicle Agnosticism: Whether the deployment is for light passenger cars, mixed fleets, or heavy commercial vehicles, the same software/hardware platform can handle the data simplifying development, maintenance, and scaling.
- Comprehensive Data & Diagnostic Coverage: From basic telemetry (location, speed, fuel usage) to advanced diagnostics (ECU fault codes, firmware flashing), user gets full visibility and control over vehicle health and behaviour.
- Ease of Integration: Platform and OS independent stacks with clean APIs make it easier for integrators to develop telematics applications without worrying about the underlying protocol differences.
- Scalability & Longevity: As vehicles evolve (new ECUs, buses, connected services), the unified stack ensures compatibility and smooth upgrades ideal for OEMs, fleet operators, and IoT solution providers.
- Rapid Time-to-Market: By providing tested, ready-to-use protocol stacks, iWave helps reduce development effort and speeds up deployment of telematics and fleet-management solutions.
iWave’s Telematics Control Units & Use-Cases
iWave’s telematics hardware (like our Telematics Control Units) is designed to take full advantage of these protocol stacks combining multi-interface support (CAN, CAN-FD, Ethernet), GNSS, cellular or wireless backhaul, and rugged enclosures to suit wide-ranging applications.
Typical use cases include:
- Fleet management for mixed fleets — trucks, buses, vans, commercial vehicles — collecting data on performance, fuel usage, maintenance, and driver behaviour.
- Connected-vehicle telematics for passenger vehicles — enabling remote diagnostics, predictive maintenance, and OBD-II monitoring.
- Off-road machinery and industrial vehicles — monitoring engine data, usage hours, fuel efficiency, and operational health under challenging environments.
- Remote diagnostics and OTA updates — leveraging UDS to perform ECU firmware updates, configuration changes, or fault code reading remotely, even over IP/CAN hybrid networks.
With iWave’s unified approach, customers can deploy scalable, protocol-agnostic telematics and analytics solutions without worrying about vehicle type or underlying network complexity.
Contact mktg@iwave-global.com for more information & enquires.
