Over the years, we have accumulated experience, and we would like to share it with everybody interested in the topic of SAE J1939. Here is the result:
PiCAN CAN Bus HATs: Empowering Raspberry Pi for Automotive & Industrial Prototyping
The PiCAN series from Copperhill Technologies is a line of CAN Bus interface boards (HATs) designed for the Raspberry Pi. These add-on boards are widely recognized as powerful and versatile, ...
SAE J1939 Network Management vs CANopen Network Management
Network management refers to the set of services and protocols that supervise the nodes (devices) on a CAN-based network – handling tasks like node addressing, status monitoring, and controlling node ...
Understanding the SAE J1939 Application Layer – What It Is, What It Does, and How Engineers Use It
When people talk about SAE J1939, they often jump straight to CAN frames, PGNs, or diagnostic trouble codes. But all of those live downstream from the most important part of ...
Using Contactless CAN and SAE J1939 Readers for Non-Intrusive Vehicle and Industrial Diagnostics
Accessing CAN bus data has traditionally required either a diagnostic connector or a direct electrical connection to the CAN-H and CAN-L lines. This applies equally to classical CAN networks as ...
Learn CAN Bus: How Modern Cars Communicate and How to Decode Vehicle Data
Why Your Car Is Smarter Than You Think—and How You Can Learn to Speak Its Language It began with a deceptively simple question: why can a modern vehicle detect a ...
The Car Hacker’s Handbook: Understanding Automotive Security, CAN Bus Vulnerabilities, and Vehicle Hacking Techniques
Modern cars are more computerized than ever, packed with infotainment and navigation systems, wireless connectivity, automatic software updates, advanced driver assistance features, and countless embedded controllers working behind the scenes ...
The CAN Bus Companion for Arduino and Raspberry Pi
This book provides a hands-on introduction to Controller Area Network (CAN) bus technology through practical projects using the Arduino Uno and the Raspberry Pi 4. By working with readily available ...
J1939 Diagnostics Made Easy: How Modern Scan Tools Simplify Diesel Engine Troubleshooting
For diesel truck owners — whether you’re running a heavy-duty rig for work or simply maintaining a robust personal vehicle — having the right diagnostic tool can mean the difference ...
DEF Sensor Simulator Explained: Background, Function, and DIY Assembly Guide
Please consider! The DEF Sensor Simulator is not an off-the-shelf device. It was originally created by a team of automotive engineers as a proof-of-concept solution for bypassing malfunctioning DEF sensors ...
Why a Ground Connection Matters on a CAN Bus (And How to Wire It Correctly)
When working with the Controller Area Network (CAN) bus—whether in automotive, industrial automation, robotics, or embedded systems—you’ll quickly notice that most CAN connectors include a ground pin. At first, this ...
Unlocking J1939 Telematics: Teensy 4.1 Triple CAN Bus Board with Ethernet and GNSS
In the heavy-vehicle, mobile-machinery and industrial equipment world, the CAN bus remains a workhorse for on-board networks. But merely having physical CAN isn’t enough: what enables rich diagnostics, telematics and ...
Understanding SPNs and FMIs in J1939: A Simple Guide for Beginners
If you’re learning SAE J1939, you’ll quickly run into two acronyms that show up everywhere—in diagnostic messages, simulation tools, engine logs, and OEM documentation: SPN (Suspect Parameter Number) FMI (Failure ...
Understanding DM1 & DM2 Messages in J1939: A Beginner-Friendly Guide
If you’re new to SAE J1939, one of the first things you’ll encounter is how heavy-duty vehicles report problems. They do this using standardized diagnostic messages, and the two most ...
Heavy Duty Truck Systems Explained: A Deep Dive into the Top Diesel Technician Textbook
If you’re looking to dive deep into the world of medium- and heavy-duty trucks—whether as a technician, a fleet maintenance manager, or a student of transportation technologies—this book is a ...
Unlocking the Engine Room: The ANCEL HD601 J1939 Truck Scanner for Heavy-Duty Diagnostics
Maintaining and troubleshooting heavy-duty trucks requires tools that go far beyond a basic automotive OBD-II reader. Whether you work with Freightliner, International, Paccar, Detroit Diesel, or Cummins engines, you need ...
INLINE Cummins adapter with SAE J1939/J1708 support for fast, reliable PC-based engine diagnostics
If you’re working with a Cummins heavy-duty engine, you already know the power and reliability these machines deliver. But to keep them performing at their best — and avoid costly ...
SAE J1939 250k/500k Baud Rate Converter with Silent Mode Support – A Game-Changer for Modern and Legacy Vehicle Integration
A recent internal market study by Copperhill Technologies uncovered a surprising but critical shortcoming across all commercially available SAE J1939 baud rate converters: none of them explicitly address the issue ...
SAE J1939 Baud Rate Options: A Technical Comparison of 250k and 500k
SAE J1939 is a family of Controller Area Network (CAN) based standards used in heavy‑duty vehicles for powertrain control and diagnostics. Historically, the standard specified a 250 kbit/s data rate, which ...
From CAN Fundamentals to SAE J1939: Network Design for Industrial and Diesel Engine Applications
Controller Area Network (CAN bus) is a widely used communication network in automotive and industrial systems. It provides a robust, real-time communication method for multiple microcontroller-based devices (nodes) to exchange ...
Bringing Diagnostic Clarity to Lithium-Ion Batteries in Rail
Rail is in the midst of a big energy storage shift: away from lead-acid batteries and toward lithium-ion. The reasons are persuasive: lithium-ion offers higher energy density, longer life, and ...
A Comprehensible Guide to J1939 is the first work on J1939 besides the SAE J1939 standards collection. It provides profound information on the J1939 message format and network management combined with a high level of readability.
The information in this book is based on two documents of the SAE J1939 Standards Collection:
- J1939/21 – Data Link Layer
- J1939/81 – Network Management
This book attempts to create an enjoyable and readable J1939 reference for everybody. The information provided in this book is, besides the SAE J1939 Standards Collection, based on publicly available information such as, but not limited to, websites and printed literature, as well as contributions by engineers familiar with Controller Area Network and the J1939 protocol. The information in this book, while based on the J1939 standard, is not a reproduction of any copyrighted SAE document. More Information…
