The answer is the Teensy 4.1 Triple CAN Bus Board with 240×240 IPS LCD and Ethernet from Copperhill Technologies.

Built around the remarkably powerful Teensy 4.1 microcontroller, this development platform combines three independent CAN interfaces, Ethernet networking, an integrated IPS display, and the processing power required for demanding real-time applications. Whether you are building an automotive gateway, industrial controller, marine electronics system, or advanced CAN data logger, this board provides everything needed to accelerate development.

Why Processor Performance Matters

Many CAN applications begin with simple message monitoring but quickly evolve into much more demanding projects:

• Processing hundreds or thousands of CAN frames per second
• Filtering multiple CAN networks simultaneously
• Converting protocols in real time
• Logging data to storage
• Serving Ethernet clients
• Displaying live system status
• Running diagnostic algorithms
• Encrypting network traffic
• Executing floating-point calculations

These tasks rapidly overwhelm conventional Arduino-class processors.

The Teensy 4.1 solves this problem with its 600 MHz ARM Cortex-M7 processor—one of the fastest microcontrollers available for Arduino-compatible development. It includes:

• 600 MHz ARM Cortex-M7 CPU
• 1 MB RAM
• 2 MB Flash memory
• Hardware Floating Point Unit (FPU)
• Cryptographic acceleration
• Real-Time Clock (RTC)
• High-speed USB
• Arduino IDE compatibility

This performance allows developers to concentrate on solving engineering problems rather than optimizing every line of code for processor limitations.

Three CAN Interfaces Open New Possibilities

One of the most valuable features of this platform is its triple CAN architecture.

The board provides:

• Two Classical CAN 2.0B interfaces
• One CAN FD interface

This makes it possible to connect multiple independent CAN networks simultaneously.

Typical examples include:

• Vehicle CAN and diagnostic CAN
• Machine control CAN and sensor CAN
• Classical CAN and CAN FD migration projects
• Gateway development
• Network simulation
• Bus monitoring and analysis

Instead of purchasing multiple development boards, engineers can implement sophisticated multi-network applications on a single compact platform.

Ethernet Makes the Board an Ideal Gateway

Industrial and automotive systems increasingly require Ethernet connectivity.

The integrated Ethernet interface enables developers to build applications such as:

• CAN-to-Ethernet gateways
• Industrial IoT devices
• Remote diagnostics
• Fleet monitoring
• Vehicle telematics
• Data acquisition systems
• Cloud-connected controllers
• Factory monitoring systems

CAN data can be collected, processed locally by the Teensy, and forwarded over Ethernet without requiring an external computer.

For many embedded applications, this dramatically reduces system complexity while improving reliability.

Integrated IPS LCD Simplifies User Interfaces

A common problem during embedded development is the lack of local visual feedback.

Instead of connecting a PC every time status information is needed, the integrated 240×240 IPS TFT display allows developers to create professional graphical user interfaces directly on the device.

Typical display functions include:

• CAN traffic monitoring
• ECU status
• Network statistics
• Error counters
• Configuration menus
• Sensor values
• Diagnostic information
• Gateway status
• IP address and Ethernet status

The IPS technology provides wide viewing angles and excellent readability for laboratory as well as field applications.

Applications Supported by the Board

The combination of processor performance, multiple CAN interfaces, Ethernet, and LCD makes this board suitable for a remarkably wide range of applications.

Automotive Development

• ECU development
• CAN gateway design
• OBD-II tools
• Vehicle diagnostics
• CAN FD migration
• J1939 development
• Automotive data logging

Heavy-Duty Vehicles

The board is particularly well suited for SAE J1939 development because it can simultaneously monitor multiple vehicle networks while communicating with external computers over Ethernet.

Typical projects include:

• Engine monitoring
• Fleet management
• Vehicle simulators
• Diagnostic tools
• J1939 gateways
• ECU testing

Industrial Automation

Industrial control systems often require communication between PLCs, sensors, and industrial controllers.

The board supports:

• Machine monitoring
• Predictive maintenance
• Industrial gateways
• Distributed controllers
• CANopen development
• Factory automation

Marine Electronics

Marine developers can use the platform for:

• NMEA 2000 applications
• Marine gateways
• Data logging
• Navigation systems
• Engine monitoring
• Vessel monitoring

Robotics

Robotic systems benefit from the board’s ability to process multiple real-time data streams while controlling motors, sensors, and network communication simultaneously.

Research and Education

Universities and research laboratories appreciate the Arduino compatibility while still obtaining professional-grade processing performance.

The board provides an excellent platform for:

• Embedded systems education
• CAN protocol research
• Network experiments
• Real-time control development

Designed for Rapid Development

One reason the Teensy platform has become so popular is its compatibility with the Arduino IDE.

Developers can leverage the vast Arduino ecosystem while benefiting from the extraordinary performance of the Teensy 4.1.

Existing Arduino libraries often require little or no modification, allowing projects to move quickly from proof of concept to fully functional prototypes.

Solving Real Engineering Problems

Rather than focusing solely on hardware specifications, it is worth considering the practical engineering challenges this board addresses.

It eliminates the need for multiple development boards when working with several CAN networks.

It provides enough processing power for demanding real-time applications without forcing developers to migrate to far more complex embedded platforms.

It combines CAN, CAN FD, Ethernet, and a graphical display into a single compact system, significantly reducing development time and wiring complexity.

Perhaps most importantly, it allows engineers to prototype products that closely resemble their final embedded systems, minimizing the gap between proof of concept and production.

Conclusion

The Teensy 4.1 Triple CAN Bus Board with 240×240 IPS LCD and Ethernet is far more than another CAN interface board.

It is a complete embedded development platform capable of handling demanding real-time applications involving multiple CAN networks, CAN FD, Ethernet communication, graphical user interfaces, and advanced processing—all on one compact board.

For engineers developing automotive electronics, heavy-duty vehicle systems, industrial automation, marine electronics, robotics, or IoT gateways, it offers an exceptional combination of flexibility, processing performance, and ease of development.

If your next project requires more than a simple CAN interface, this platform provides the computing power and connectivity to support today’s complex embedded systems while leaving plenty of headroom for tomorrow’s requirements.

Kickstart IoT Systems Engineering: Build Intelligent IoT Systems from Embedded Devices to Cloud and Edge AI

Connected devices are transforming virtually every industry—from smart manufacturing and precision agriculture to healthcare, transportation, and autonomous systems. Kickstart IoT Systems Engineering takes you on a practical, hands-on journey from the fundamentals of the Internet of Things to designing secure, scalable, AI-enabled IoT solutions. Starting with IoT architecture, sensors, microcontrollers, and essential communication protocols such as MQTT, REST APIs, LoRa, and Bluetooth Low Energy (BLE), you will gradually build connected systems that communicate reliably with cloud platforms including Firebase and AWS IoT Core while following modern enterprise integration practices.

Rather than focusing on theory alone, this book emphasizes real-world implementation using Arduino, NodeMCU, and ESP32 development platforms. Through step-by-step projects, you will develop cloud-connected applications featuring data logging, remote monitoring, alert systems, GPIO control, secure device communication, Edge AI, TinyML, and computer vision. By the end of the book, you will have the skills and confidence to design, build, secure, deploy, and scale production-ready IoT systems—from a single connected sensor to enterprise-grade, AI-powered IoT deployments. More information...

One practical solution is a protocol gateway that can receive messages on one network, process or translate them, and transmit them onto another network. The good news is that the hardware platform already exists.

The ESP32-S3 Board with CAN FD and Classical CAN Ports provides an ideal foundation for developing a high-performance Classical CAN to CAN FD gateway. Combining wireless connectivity, ample processing power, and dedicated support for both CAN technologies, the board offers everything needed for gateway development in a single compact platform.

Why a CAN-to-CAN FD Gateway?

Many existing systems still rely on Classical CAN operating at data rates up to 1 Mbps. At the same time, newer networks increasingly use CAN FD to achieve higher throughput, reduced latency, and more efficient data transfer.

A gateway enables:

• Migration from Classical CAN to CAN FD without redesigning existing equipment
• Integration of legacy devices into modern CAN FD networks
• Message filtering and protocol translation
• Data aggregation from multiple CAN sources
• Future-proof system architectures

Instead of replacing an entire installed network, a gateway allows both technologies to coexist.

ESP32S3 Board with CAN FD and Classical CAN Ports

The ESP32-S3 Board with CAN FD and Classical CAN Ports is a powerful development platform designed for engineers working with modern and legacy CAN networks. Built around the ESP32-S3-WROOM-1-N8R8 module, the board combines a dual-core 240 MHz processor, 8 MB Flash memory, 8 MB PSRAM, Wi-Fi, Bluetooth 5, and native USB connectivity in a compact design. What makes the board particularly attractive for automotive, industrial, marine, and IoT applications is its dual CAN architecture: Classical CAN is provided directly by the ESP32-S3’s integrated controller, while CAN FD support is implemented through the Microchip MCP2518FD controller, allowing simultaneous access to both technologies on a single platform.

This unique combination makes the board an ideal foundation for CAN gateways, protocol converters, data loggers, diagnostics tools, and wireless monitoring systems. Developers can create applications that bridge Classical CAN and CAN FD networks, aggregate and process data in real time, or connect CAN-based systems to cloud services through Wi-Fi or Bluetooth. Additional features such as high-speed CAN transceivers, USB-C programming, an I²C expansion connector, wide-range 7–24 V power input with reverse-polarity protection, and onboard status indicators make the board suitable for both prototyping and deployment in demanding environments. Whether you are migrating legacy systems to CAN FD or developing next-generation connected devices, this board provides an exceptionally flexible hardware platform. More information...

Hardware Designed for the Task

The ESP32-S3 board includes two completely independent CAN interfaces:

Classical CAN Interface

The ESP32-S3 microcontroller provides an integrated CAN controller (TWAI), connected to an onboard CAN transceiver. This interface supports standard CAN 2.0A and CAN 2.0B communication. 

CAN FD Interface

A dedicated Microchip MCP2518FD controller provides CAN FD functionality through an SPI connection to the ESP32-S3. The MCP2518FD supports both Classical CAN and CAN FD operation, including data rates up to 8 Mbps.

This architecture allows the board to simultaneously monitor, process, and transfer traffic between a Classical CAN network and a CAN FD network.

Why the ESP32-S3 Makes Sense

Gateway applications require more than just two CAN ports. They also need processing power, memory, and flexibility.

The ESP32-S3 offers:

• Dual-core Xtensa LX7 processor running at up to 240 MHz
• Integrated floating-point unit
• 8 MB Flash memory
• 8 MB PSRAM
• Wi-Fi connectivity
• Bluetooth Low Energy support
• USB-C programming interface
• Low-cost development environment based on the Arduino IDE or ESP-IDF framework

This combination allows developers to implement sophisticated gateway functions without requiring additional hardware.

Beyond Simple Message Forwarding

A modern gateway can perform far more than merely forwarding CAN frames.

Potential features include:

Protocol Translation

Convert Classical CAN messages into CAN FD frames and vice versa.

Data Aggregation

Combine multiple Classical CAN messages into larger CAN FD payloads.

Intelligent Filtering

Reduce bus load by forwarding only selected messages.

Diagnostics and Logging

Capture network traffic and store diagnostic information.

Wireless Connectivity

Use Wi-Fi to provide remote monitoring, firmware updates, cloud connectivity, or web-based configuration interfaces. 

Security and Access Control

Implement application-specific filtering and validation before forwarding messages.

Typical Applications

The platform is particularly attractive for:

• Industrial automation upgrades
• Heavy-duty vehicle networks
• Agricultural equipment
• Marine electronics
• Test and simulation systems
• Data acquisition platforms
• Research and development projects

Any application requiring interoperability between legacy CAN and CAN FD networks can benefit from this architecture.

Currently Under Development

At Copperhill Technologies, we are currently developing a complete Classical CAN to CAN FD gateway application based on this hardware platform.

The project is focused on creating a flexible and configurable solution that can serve as a starting point for custom gateway applications in industrial, automotive, agricultural, and marine environments.

If your project requires:

• CAN-to-CAN FD conversion
• Protocol translation
• Custom message processing
• Data logging
• Wireless CAN connectivity

we would be interested in discussing your requirements.

Interested in a CAN-to-CAN FD Gateway?

Whether you need a turnkey solution or a customized implementation, we would like to hear about your application.

Contact us and tell us about your project. Your requirements may help shape the final feature set of our upcoming gateway software.

Stay tuned for future updates as development progresses.

However, as projects become more sophisticated, the limitations of a single CAN port quickly become apparent. This is where dual-channel CAN interfaces such as the PiCAN2 Duo and PiCAN3 Duo for Raspberry Pi offer significant advantages.

In this article, we will explore practical applications for dual-port CAN interfaces and explain why many professional CAN-based systems rely on multiple CAN channels.

The Basics: One Raspberry Pi, Two Independent CAN Networks

A dual-channel CAN HAT provides two completely independent CAN interfaces that appear as separate devices under Linux.

For example:

can0
can1

Each interface can operate at its own bit rate and connect to its own CAN network.

This allows a Raspberry Pi to communicate with two different CAN buses simultaneously.

Building CAN-to-CAN Gateways

One of the most common applications for a dual-channel CAN interface is gateway development.

A CAN gateway receives messages from one network, processes them, and transmits selected information onto another network.

Examples include:

• Vehicle telematics systems
• Industrial automation gateways
• Marine electronics integration
• Electric vehicle control systems
• Fleet management devices

In many modern machines, multiple CAN networks are used to separate functions and improve reliability. A gateway acts as the bridge between these networks.

Typical Gateway Architecture

Engine Network
      |
     CAN0
      |
 Raspberry Pi
  CAN Gateway
      |
     CAN1
      |
Display Network

The Raspberry Pi can filter, modify, translate, or log messages as they pass between networks.

Connecting Networks with Different Bit Rates

Not all CAN networks operate at the same speed.

Examples include:

• SAE J1939 at 250 kbps
• NMEA 2000 at 250 kbps
• Industrial CAN networks at 500 kbps
• Automotive CAN networks at 500 kbps or 1 Mbps

A dual-port CAN interface allows each channel to operate independently.

For example:

sudo ip link set can0 up type can bitrate 250000
sudo ip link set can1 up type can bitrate 500000

The Raspberry Pi can then transfer information between networks operating at different bit rates.

Monitoring Two Networks Simultaneously

Dual CAN interfaces are extremely useful for diagnostics and troubleshooting.

Rather than monitoring a single network, engineers can observe multiple networks at the same time.

Examples include:

• Engine network versus transmission network
• Vehicle network versus diagnostic tool traffic
• Sensor network versus actuator network

This capability can dramatically reduce debugging time during system integration.

Developing SAE J1939 Applications

SAE J1939 developers often benefit from two independent CAN channels.

One CAN channel can be connected to a live vehicle network while the second channel is used for testing and simulation.

Typical applications include:

• ECU simulation
• Data logging
• Protocol analysis
• Gateway development
• Vehicle monitoring systems

For example, a developer may monitor engine traffic on one interface while transmitting simulated sensor data on the second interface.

This arrangement helps prevent accidental interference with the operational network.

Creating CAN Data Loggers

Many data acquisition systems collect information from multiple CAN networks simultaneously.

Examples include:

• Engine control network
• Battery management network
• Hydraulic control network
• Vehicle diagnostics network

A dual-channel Raspberry Pi platform allows all data to be collected by a single computer.

The logged information can then be stored locally or uploaded to cloud-based monitoring systems.

Protocol Translation

Manufacturers often implement proprietary CAN protocols.

When equipment from different vendors must communicate, protocol conversion may be required.

A Raspberry Pi equipped with two CAN ports can serve as a protocol translator.

Examples include:

• SAE J1939 to proprietary CAN
• NMEA 2000 to custom CAN
• Industrial machine networks to cloud gateways
• Legacy equipment to modern control systems

The flexibility of Linux and open-source software makes the Raspberry Pi an excellent platform for these applications.

CAN Network Isolation

In some situations, direct connection between two CAN networks is undesirable.

Reasons may include:

• Security concerns
• Electrical isolation requirements
• Protocol incompatibilities
• Network traffic filtering

A Raspberry Pi gateway can selectively forward only the messages required by the application.

This approach provides greater control and improves system reliability.

Why Not Use Two USB-to-CAN Adapters?

A common question is why not simply connect two USB-to-CAN adapters to a Raspberry Pi.

While this approach works, dedicated dual-channel CAN HATs offer several advantages:

• More compact installation
• Improved reliability
• Reduced USB cable clutter
• Lower power consumption
• Better integration for embedded applications
• Easier deployment in production systems

For long-term projects and commercial products, integrated CAN HATs are generally the preferred solution.

Ideal Applications for Dual-Port CAN Interfaces

A dual-channel CAN HAT is particularly useful for:

• SAE J1939 development
• NMEA 2000 development
• Vehicle telematics systems
• Industrial automation
• CAN data logging
• Protocol conversion
• Gateway development
• Network diagnostics
• Test and measurement systems
• Electric vehicle projects

Conclusion

While a single CAN interface is sufficient for basic monitoring and development tasks, many professional CAN applications require communication with multiple networks simultaneously.

Dual-channel CAN interfaces enable gateway development, protocol translation, multi-network monitoring, data logging, and advanced diagnostics—all from a single Raspberry Pi platform.

For engineers developing CAN-based systems, a dual-port CAN HAT can significantly expand the capabilities of a Raspberry Pi and provide a flexible foundation for both prototyping and production applications.

PiCAN2 Duo CAN Bus Board For Raspberry Pi 4 With 3A SMPS

The PiCAN2 Duo CAN Bus Board transforms a Raspberry Pi 4 into a powerful dual-channel CAN platform, providing two completely independent CAN 2.0B interfaces that appear as standard SocketCAN devices (can0 and can1) under Linux. Whether you are developing SAE J1939 applications, building CAN-to-CAN gateways, monitoring multiple vehicle networks, or creating advanced data logging systems, the PiCAN2 Duo delivers the flexibility needed for professional automotive, industrial, marine, and embedded applications. Based on the proven Microchip MCP2515 CAN controllers and MCP2551 transceivers, the board supports communication speeds up to 1 Mb/s on each channel while maintaining seamless compatibility with C, Python, and other SocketCAN-based software environments.

What sets the PiCAN2 Duo apart is its integrated 5V, 3A switch-mode power supply, capable of accepting input voltages from 7V to 24V and powering both the Raspberry Pi and the CAN interface from a single connection. This makes the board particularly well suited for vehicle, mobile, and industrial installations where a dedicated Raspberry Pi power supply is impractical. With onboard termination options, activity LEDs, interrupt-driven operation, and a compact HAT-compatible design, the PiCAN2 Duo provides a robust and reliable foundation for CAN gateway development, telematics systems, protocol conversion, network diagnostics, and real-time control applications. More information...

The challenge is not collecting the data—it is collecting the right data reliably, even when GPS signals disappear.

That is where the PiCAN FD with GPS/GNSS u-blox NEO-M8U Untethered Dead Reckoning board for Raspberry Pi shines. By combining CAN FD connectivity with advanced GNSS positioning and dead-reckoning technology, it provides a powerful platform for telematics, fleet management, autonomous systems, data logging, and vehicle analytics applications.

More Than Just a CAN Interface

At first glance, the board appears to be a CAN FD interface for the Raspberry Pi. However, it is much more than that.

The board combines:

• CAN FD and Classical CAN communication
• High-performance Microchip MCP2518FD CAN controller
• Integrated u-blox NEO-M8U GNSS receiver
• Multi-constellation satellite support
• Built-in accelerometer and gyroscope sensors
• Untethered Dead Reckoning (UDR) technology
• SocketCAN compatibility under Linux
• C and Python programming support
• Raspberry Pi HAT compatibility

The result is a compact platform capable of simultaneously collecting vehicle network data and highly accurate positioning information.

Why Traditional GPS Is Not Enough

Anyone who has used a GPS receiver knows the limitations.

Position information is usually excellent in open areas, but performance deteriorates when vehicles enter:

• Parking garages
• Tunnels
• Urban canyons
• Dense city centers
• Industrial facilities
• Covered loading areas

Traditional GPS receivers often lose their position completely under such conditions.

The u-blox NEO-M8U addresses this problem using Untethered Dead Reckoning (UDR), a technology that combines GNSS data with onboard inertial sensors such as accelerometers and gyroscopes. When satellite reception becomes unavailable, the receiver continues estimating vehicle position using motion data.

For telematics applications, this means fewer gaps in tracking data and significantly improved route accuracy.

Application #1: Fleet Management Systems

Fleet operators depend on accurate vehicle location information.

A Raspberry Pi equipped with the PiCAN FD GPS board can simultaneously:

• Monitor vehicle position
• Collect fuel consumption data
• Record engine hours
• Capture driver behavior
• Monitor fault codes
• Track route efficiency

Because the board can access CAN and CAN FD networks directly, valuable operational data can be combined with location information in a single system.

Examples include:

• Truck fleets
• Municipal vehicles
• Delivery vans
• Construction equipment
• Utility service vehicles
• Agricultural machinery

The integrated dead-reckoning capability helps maintain location awareness even when vehicles enter tunnels, parking structures, or dense urban environments. 

Application #2: Usage-Based Insurance (UBI)

Insurance companies increasingly rely on driving behavior analytics.

A vehicle monitoring system based on Raspberry Pi and PiCAN FD can collect:

• Vehicle speed
• Acceleration events
• Harsh braking events
• Cornering behavior
• Trip duration
• Distance traveled

The NEO-M8U’s integrated motion sensors provide additional information that can be used to identify aggressive driving patterns and accident-related events. Similar use cases have been highlighted as key applications for dead-reckoning technology.

Application #3: Commercial Vehicle Telematics

Heavy-duty vehicles already contain a wealth of information on their CAN networks.

For SAE J1939 applications, developers can access data such as:

• Engine speed
• Vehicle speed
• Fuel rate
• Engine temperatures
• Engine load
• Diagnostic trouble codes
• Aftertreatment data

Combining these parameters with accurate GNSS positioning creates a powerful telematics platform suitable for:

• Fleet optimization
• Fuel-efficiency studies
• Driver performance monitoring
• Predictive maintenance
• Regulatory reporting

The Raspberry Pi provides sufficient computing power to analyze and upload this information in real time.

Application #4: Vehicle Data Loggers

Engineers often need to record vehicle data during development and testing.

The PiCAN FD GPS board allows simultaneous recording of:

• CAN traffic
• CAN FD traffic
• GPS coordinates
• Vehicle movement
• Time synchronization information

Potential users include:

• Automotive engineers
• Off-highway vehicle developers
• Agricultural equipment manufacturers
• Research institutions
• University engineering programs

With SocketCAN support, developers can immediately leverage existing Linux tools and software libraries.

Application #5: Road Pricing and Mileage Tracking

Several transportation systems rely on precise distance measurements and vehicle tracking.

Applications include:

• Road-use charging
• Tolling systems
• Commercial mileage reporting
• Fleet billing
• Vehicle utilization monitoring

Dead-reckoning technology helps maintain route continuity where GPS coverage would normally be interrupted. In fact, road-pricing applications are specifically identified as a key benefit of UDR technology.

Application #6: Smart Agriculture

Modern agricultural equipment increasingly relies on CAN-based communication.

A Raspberry Pi equipped with this board can become the heart of:

• Tractor monitoring systems
• Sprayer controllers
• Harvesting data collection
• Equipment utilization tracking
• Remote fleet monitoring

The ability to combine vehicle-network data with precise location information opens opportunities for precision farming applications.

Application #7: Emergency and Service Vehicles

Location accuracy becomes critically important for:

• Ambulances
• Fire departments
• Police vehicles
• Utility repair fleets
• Roadside assistance vehicles

When operating in cities, parking garages, or other GPS-challenged environments, dead-reckoning technology helps maintain continuous positioning information. Similar deployments have already been identified for emergency-service applications.

Application #8: Autonomous and Robotics Platforms

Although the NEO-M8U is optimized for motor vehicles, the combination of:

• GNSS positioning
• Inertial sensors
• CAN FD communication
• Raspberry Pi processing power

creates an attractive development platform for robotics and autonomous vehicle research.

Developers can use CAN FD to communicate with motor controllers, sensors, and other intelligent devices while simultaneously maintaining accurate positioning information.

Easy Development with Linux and Raspberry Pi

One of the board’s strongest advantages is simplicity.

The CAN interface appears as a standard SocketCAN device under Linux, allowing developers to immediately use:

• Python
• C/C++
• Node-RED
• ROS
• MQTT
• Cloud platforms
• Existing Linux CAN utilities

This significantly shortens development time compared to building a custom hardware platform from scratch.

The Bottom Line

The PiCAN FD with GPS/GNSS u-blox NEO-M8U is much more than a CAN FD interface. It is a complete vehicle-data acquisition and positioning platform that combines CAN networking, GNSS navigation, inertial sensing, and Raspberry Pi computing power into a single compact solution.

Whether you are developing a fleet-management platform, telematics gateway, usage-based insurance device, vehicle data logger, agricultural monitoring system, or smart transportation application, this board provides the building blocks needed to transform raw vehicle data into actionable information.

In an industry where knowing both what the vehicle is doing and where it is doing it is becoming increasingly important, the combination of CAN FD and untethered dead reckoning creates opportunities that extend far beyond traditional GPS tracking.

Truck route planning and fleet digitization with telematics: How to use cloud services to optimize truck fleets and reduce costs by digitizing processes

This book demonstrates how digitizing your fleet can drive measurable efficiency gains across a wide range of industries, including bakery distribution, construction logistics, brewing, vehicle transport, fresh food delivery, beverage and food wholesale, oil distribution, milling, recycling, plumbing supplies, and textile services.

The primary focus is on practical route optimization strategies and the accurate calculation of transportation costs—both per transport unit and for individual customer stops. These insights enable companies to improve resource utilization, reduce operating costs, and make more informed logistics decisions.

Drawing on many years of industry experience, Dr. Jürgen Stausberg also explains how organizations can successfully manage the human side of digital transformation. He provides practical guidance on communicating change to dispatchers, controllers, planners, and drivers, helping companies gain acceptance and maximize the benefits of fleet digitization. More information...

One of the most common support requests we receive begins with the assumption that the PiCAN board is defective. In reality, after many years of supporting CAN bus applications, we have learned that almost every communication issue originates outside the PiCAN board itself. Incorrect termination, wiring mistakes, missing grounds, bit-rate mismatches, and connector problems account for the overwhelming majority of CAN bus failures. Before suspecting the hardware, it pays to understand how a CAN network actually works.

Step 1: Verify the CAN Interface Is Running

The first step is to make sure the CAN controller has been configured correctly.

For SocketCAN systems, you can verify operation using:

ifconfig can0

or

ip -details link show can0

A properly configured interface should show:

can0: UP

If the interface is down, no CAN communication can occur regardless of the wiring.

Step 2: Check the CAN Bus Bit Rate

One of the most common mistakes is a bit-rate mismatch.

CAN is not like Ethernet where devices automatically negotiate speeds.

Every node on the network must use exactly the same bit rate.

Common bit rates include:

If one node is operating at 250 kbps and another at 500 kbps, communication is impossible.

The CAN controller will see activity on the bus but will interpret it as errors.

Always verify the bit rate of every device connected to the network.

Step 3: Understand CAN Bus Termination

If CAN troubleshooting had a Hall of Fame, missing termination resistors would be the undisputed champion.

A CAN network requires two termination resistors.

Each resistor has a value of:

120 Ohms

One resistor is installed at each physical end of the network.

The result is a measured resistance between CAN_H and CAN_L of approximately:

60 Ohms

when power is removed from the network.

The CAN bus should look like this:

120Ω                    120Ω
|                        |
Node ---- Node ---- Node ---- Node

Not this:

120Ω
|
Node ---- Node ---- Node ---- Node

And definitely not this:

Node ---- Node ---- Node ---- Node

Without proper termination, signal reflections occur, causing corrupted messages, intermittent communication failures, and endless frustration.

Step 4: Using the PiCAN J1 Termination Jumper

Most PiCAN boards include jumper J1.

This jumper enables the onboard 120-Ohm termination resistor.

The purpose of J1 is to simplify development and testing.

When J1 is installed:

Termination Enabled

When J1 is removed:

Termination Disabled

Whether J1 should be installed depends entirely on the physical location of the PiCAN board within the CAN network.

PiCAN at the End of the Network

If the Raspberry Pi with the PiCAN board is physically located at one end of the bus:

PiCAN ---- Node ---- Node ---- 120Ω
 ^
 J1 Enabled

J1 should be installed.

PiCAN in the Middle of the Network

If the PiCAN board is somewhere in the middle:

120Ω ---- Node ---- PiCAN ---- Node ---- 120Ω
                     ^
                J1 Disabled

J1 must be removed.

Installing extra termination resistors is just as problematic as having too few.

Step 5: Measure the Bus Resistance

A simple multimeter can solve many CAN mysteries.

Turn off power to the network.

Measure resistance between:

CAN_H and CAN_L

Expected readings:

This single measurement can often identify the problem in less than 30 seconds.

Step 6: Verify CAN_H and CAN_L Wiring

It sounds obvious, but it happens more often than you might think.

Check that:

CAN_H → CAN_H
CAN_L → CAN_L

and not:

CAN_H → CAN_L
CAN_L → CAN_H

Crossed wires will prevent communication entirely.

Some devices label the signals differently:

CANH
CAN-H
H

CANL
CAN-L
L

Always verify the documentation.

Step 7: Check Ground Connections

A CAN bus is designed for differential signaling and is relatively tolerant of noise.

However, devices still need a common reference.

Many CAN communication problems disappear after connecting grounds properly.

A typical connection includes:

CAN_H
CAN_L
GND

Neglecting the ground connection may lead to intermittent operation, especially with longer cable runs.

Step 8: Look for Error Frames

The CAN protocol is exceptionally good at detecting communication problems.

When something is wrong, nodes generate error frames and increment their error counters.

Common causes include:

• Incorrect bit rate
• Missing termination
• Excessive bus length
• Faulty wiring
• Ground problems

The CAN controller is usually trying to tell you something.

Listen to it.

Step 9: Test with a Simple Setup

When troubleshooting becomes complicated, simplify.

Disconnect everything except:

• Raspberry Pi with PiCAN
• One known-good CAN node
• Proper termination at both ends

A two-node network eliminates many variables and often reveals the issue quickly.

The Reality: The PiCAN Board Is Usually Innocent

Engineers often spend hours investigating software settings, drivers, and hardware before discovering:

• A loose connector
• Missing termination
• Incorrect bit rate
• Reversed CAN wires
• Missing ground

The PiCAN series has proven itself in countless applications ranging from industrial automation to vehicle diagnostics and marine systems.

Like any electronic device, hardware failures are theoretically possible.

However, in practice they are exceedingly rare.

When CAN communication fails, the odds overwhelmingly favor an external wiring issue rather than a defective PiCAN board.

In other words:

Before blaming the PiCAN board, grab a multimeter.

The bus is usually trying to tell you exactly what’s wrong.

You just need to listen.

Practical Python Programming for IoT: Build advanced IoT projects using a Raspberry Pi 4, MQTT, RESTful APIs, WebSockets, and Python 3

The Internet of Things (IoT) is transforming the way devices interact, communicate, and automate everyday tasks. Combining the versatility of Python with the power of Raspberry Pi, this practical guide teaches you how to design and build connected systems that bridge the gap between software and hardware. Through hands-on projects and real-world examples, you will learn how sensors, actuators, and cloud services work together to create intelligent IoT applications.

Starting with IoT networking fundamentals, including REST APIs, WebSockets, and MQTT, the book then introduces electronics, GPIO interfacing, and circuit design before moving on to practical projects involving sensors, motors, motion detection, temperature monitoring, and automation. Along the way, you will integrate popular IoT platforms such as ThingSpeak and IFTTT, explore modern Python programming techniques, and develop complete end-to-end IoT solutions. By the end of the book, you will have the skills and confidence to build sophisticated IoT systems using Python and Raspberry Pi. More information...

In small systems, that is often true.

However, as soon as a CAN network grows beyond a handful of devices, spans long distances, operates in electrically noisy environments, or connects equipment powered from different sources, new challenges begin to emerge. Communication errors increase, intermittent failures become difficult to diagnose, and network reliability suffers.

This is exactly where the CAN-11 CAN Bus DIN Rail Isolated Repeater becomes an invaluable tool. The device is designed to improve network reliability, increase installation flexibility, and protect CAN nodes from electrical damage while maintaining complete protocol transparency.

What Is a CAN Bus Repeater?

A CAN repeater is a device that sits between two CAN bus segments and transparently forwards all CAN traffic in both directions.

To the connected nodes, the network still appears as a single CAN bus. Messages, acknowledgments, arbitration, and error handling continue to function normally.

The CAN-11 adds an important capability beyond simple signal regeneration: galvanic isolation. The two CAN segments are electrically isolated from each other while still exchanging CAN messages. This isolation dramatically improves system robustness in industrial and vehicle applications.

CAN-11 CAN Bus DIN Rail Isolated Repeater

The CAN-11 CAN Bus DIN Rail Isolated Repeater is an industrial-grade solution designed to improve the reliability, scalability, and robustness of CAN bus networks. By providing 1.5 kV galvanic isolation between network segments, it protects sensitive CAN devices from ground loops, electrical surges, and noise commonly encountered in automotive, heavy-duty vehicle, marine, and industrial automation environments. The repeater transparently forwards CAN messages between isolated network segments while maintaining full compatibility with CAN 2.0A/B networks. Its compact DIN-rail mount design, detachable terminals, and wide 9–28 VDC power input make installation straightforward in control cabinets, machinery, and vehicle systems.

Beyond electrical isolation, the CAN-11 solves several common network design challenges. It allows engineers to extend CAN bus length, increase node count, and implement star, tree, or segmented network topologies without compromising communication integrity. Built-in arbitration logic and a Dominant Timeout (DTO) function automatically isolate faulty network segments, preventing a single malfunctioning node from disrupting the entire system. With adaptive baud rates from 10 Kbps to 1 Mbps, support for up to 110 nodes, and an ultra-low loopback delay of approximately 110 nanoseconds, the CAN-11 provides a practical way to build larger and more reliable CAN networks while preserving the deterministic performance required by protocols such as SAE J1939, CANopen, and proprietary CAN-based systems. More information...

The Problems the CAN-11 Solves

1. Ground Loops

Ground loops are one of the most common causes of mysterious CAN communication issues.

Imagine a factory installation where equipment is powered from different electrical panels. Although all devices share a CAN network, their ground potentials may differ by several volts.

Without isolation, these voltage differences create unwanted currents through communication wiring. The result may include:

• Communication errors
• Unstable network operation
• Damaged transceivers
• Difficult-to-diagnose intermittent failures

The CAN-11 provides 1.5 kV galvanic isolation between network segments, preventing these currents from flowing through the CAN wiring.

2. Electrical Surges and Noise

Industrial environments are filled with electrical noise sources:

• Motor drives
• Solenoids
• Contactors
• Welding equipment
• High-current power systems

Similarly, heavy-duty vehicles contain alternators, starters, electric hydraulic systems, and long cable runs.

These conditions can introduce voltage spikes and transient disturbances that threaten CAN transceivers.

The CAN-11 uses magnetic isolation technology and surge protection circuitry to shield one network segment from disturbances occurring on another segment.

3. Extending Network Size

A common misconception is that a CAN network can be expanded indefinitely simply by adding more cable and more nodes.

In reality, every CAN transceiver contributes electrical loading to the network. Cable length also affects signal quality and timing.

The CAN-11 effectively creates two electrically independent CAN segments while maintaining transparent communication between them. This allows engineers to build larger systems without violating physical-layer limitations.

4. Creating Practical Network Topologies

Traditional CAN bus guidelines recommend a linear bus structure.

Real-world installations rarely cooperate.

Consider:

• Factory automation systems
• Agricultural machinery
• Building automation
• Marine electronics
• Test benches

In many cases, a star or tree structure is significantly easier to install than a long daisy chain.

The CAN-11 supports network architectures including:

• Linear topologies
• Branch extensions
• Star topologies
• Tree topologies

This provides much greater installation flexibility while preserving CAN communications.

5. Fault Isolation

A single faulty node can bring down an entire CAN network.

For example:

• A damaged transceiver
• Shorted wiring
• Connector contamination
• Water ingress

These failures may force the CAN bus into a permanent dominant state, preventing all other nodes from communicating.

The CAN-11 includes a Dominant Timeout (DTO) function. When one segment remains continuously dominant due to a fault, the repeater automatically isolates that segment, allowing the healthy side of the network to continue operating.

For mission-critical systems, this feature alone can prevent costly downtime.

Why Isolation Matters in SAE J1939 Networks

SAE J1939 networks frequently span large vehicles such as:

• Trucks
• Buses
• Agricultural equipment
• Construction machinery
• Mining equipment

These installations often involve:

• Long wiring harnesses
• Multiple power domains
• Harsh electrical environments

A CAN fault in one subsystem can potentially affect the entire vehicle network.

By isolating network segments, the CAN-11 improves reliability and protects expensive ECUs from electrical disturbances. This makes it particularly attractive for J1939 installations.

Performance Without Sacrificing CAN Timing

One concern engineers often have is whether a repeater will disrupt CAN arbitration or introduce excessive latency.

The CAN-11 is specifically designed to avoid these issues.

Key specifications include:

• Baud rates from 10 Kbps to 1 Mbps
• Loopback delay as low as 110 ns
• Built-in bus arbitration logic
• Support for up to 110 nodes

These characteristics ensure transparent operation even in demanding real-time applications.

Typical Applications

Industrial Automation

• PLC networks
• Machine control systems
• Robotics
• Distributed I/O systems

Heavy-Duty Vehicles

• SAE J1939 networks
• Construction equipment
• Agricultural machinery
• Mining vehicles

Marine Electronics

• Engine monitoring systems
• Navigation equipment
• Vessel automation systems

Laboratory and Test Systems

• CAN development benches
• HIL testing
• Data acquisition systems
• Vehicle simulation platforms

Building and Infrastructure Control

• Energy management systems
• Elevator control systems
• Distributed monitoring equipment

Installation Advantages

The CAN-11 was designed with industrial deployment in mind.

Features include:

• Standard 35 mm DIN rail mounting
• Compact 17.5 mm wide housing
• Wide input voltage range (9–28 VDC)
• Detachable screw terminals
• LED indicators for power and CAN activity
• Operating temperature range from -25°C to +70°C

These features simplify installation and troubleshooting in control cabinets and industrial enclosures.

Final Thoughts

Many CAN network problems are not caused by software, baud rate settings, or protocol issues. They originate at the physical layer:

• Ground loops
• Electrical noise
• Excessive network loading
• Faulty devices
• Improper network expansion

The CAN-11 CAN Bus DIN Rail Isolated Repeater addresses these challenges directly.

By combining galvanic isolation, fault containment, topology flexibility, surge protection, and transparent CAN operation, it provides a simple and effective way to build larger, more reliable CAN networks.

Whether you’re working with SAE J1939 systems, industrial automation equipment, CANopen devices, or custom embedded CAN applications, the CAN-11 helps ensure that your network remains stable, protected, and scalable for years to come.

Industrial Network Security: Securing Critical Infrastructure Networks for Smart Grid, SCADA, and Other Industrial Control Systems

As cyber threats continue to evolve in sophistication and frequency, securing critical infrastructure systems—including energy production, water treatment, oil and gas facilities, transportation networks, and manufacturing operations—has become both a business necessity and a regulatory requirement. Industrial Network Security, Third Edition provides a comprehensive guide to understanding and protecting Industrial Control Systems (ICS), Supervisory Control and Data Acquisition (SCADA) networks, and other operational technology (OT) environments that form the backbone of modern infrastructure. Written by cybersecurity expert Eric Knapp, the book examines the unique protocols, architectures, and operational challenges that distinguish industrial networks from traditional IT systems while offering practical strategies for identifying vulnerabilities and mitigating risk.

This extensively updated edition incorporates the latest developments in industrial cybersecurity, including detailed analyses of real-world attacks such as Trisis, Industroyer, and Incontroller. Readers will gain valuable insights into risk management for cyber-physical systems, OT attack methodologies, USB security, OT Cyber Kill Chains, and incident response lifecycles tailored to industrial environments. The book also expands its coverage of network segmentation, monitoring, threat detection, asset discovery, log collection, and industrial-focused SIEM solutions. With clear implementation guidance, updated security controls, and practical examples drawn from actual incidents, Industrial Network Security, Third Edition serves as an essential reference for engineers, security professionals, plant managers, and anyone responsible for protecting critical infrastructure from modern cyber threats. More information...

How do you access CAN bus data without modifying the wiring harness?

Traditionally, accessing a CAN network requires physically connecting to the CAN-High and CAN-Low wires, using diagnostic connectors, or installing T-taps and splice connectors. While these methods work, they often introduce concerns about warranty violations, installation complexity, reliability, and safety.

The CANCrocodile Contactless CAN Bus Reader solves this problem by providing a completely non-invasive method of reading CAN bus traffic. Instead of making an electrical connection to the network, the device reads the electromagnetic field generated by CAN communication and reconstructs the CAN messages without touching the conductors themselves.

The Problem with Traditional CAN Connections

Many engineers assume that connecting to a CAN network is straightforward. In reality, accessing vehicle data can become surprisingly difficult.

Common challenges include:

• No accessible CAN connector
• Sealed wiring harnesses
• Vehicle warranty concerns
• Restrictions from fleet operators
• Risk of wiring damage
• Need for rapid installation and removal
• Limited access to heavy-duty equipment

In fleet management and telematics applications, installers often spend significant time locating suitable connection points. Every splice, connector, or wire modification increases installation time and creates a potential failure point.

For leased vehicles, rental equipment, or customer-owned machinery, modifying the wiring harness may not even be permitted.

CANCrocodile - Contactless CAN Bus Reader

The CANCrocodile Contactless CAN Bus Reader is an innovative tool designed for reading CAN bus and SAE J1939 network traffic without making any electrical connection to the vehicle wiring. Instead of cutting, stripping, or tapping into the CAN wires, the device detects the electromagnetic field generated by CAN communications and converts it into a usable CAN signal. Operating in a passive “listen-only” mode, the CANCrocodile never transmits data onto the network and does not alter existing messages, making it an exceptionally safe solution for vehicle telematics, fleet management, diagnostics, and data logging applications.

The primary advantage of the CANCrocodile is its ability to access valuable vehicle data while preserving the integrity of the original wiring harness and avoiding warranty concerns. Engineers, fleet operators, and telematics providers can monitor parameters such as engine speed, vehicle speed, fuel consumption, oil pressure, coolant temperature, and many other CAN-based signals without invasive installation procedures. Its non-intrusive design reduces installation time, eliminates the risk of wiring damage, and provides a reliable method for gathering operational data from trucks, buses, construction equipment, agricultural machinery, and other CAN-enabled systems. More information..

How the CANCrocodile Works

Unlike traditional CAN interfaces, the CANCrocodile does not electrically connect to the CAN bus.

Instead, it clamps around the CAN-High and CAN-Low wires and detects the electromagnetic fields generated by data transmission. Internal electronics reconstruct the CAN messages and provide them through a standard CAN interface to the connected device.

The process is remarkably simple:

1. Identify the CAN-H and CAN-L wires.
2. Open the CANCrocodile housing.
3. Place the wires inside the sensor.
4. Close the housing.
5. Connect the reader to the monitoring device.

No wire stripping.

No soldering.

No insulation piercing.

No electrical contact with the network.

Why Contactless CAN Access Matters

1. Preserve Vehicle Warranties

Many vehicle manufacturers discourage modifications to factory wiring harnesses.

By avoiding any electrical connection, the CANCrocodile provides a warranty-friendly method of accessing CAN traffic. Since the wiring remains untouched, the original electrical integrity of the system is preserved.

2. Reduce Installation Time

Traditional CAN installations may require:

• Removing dashboard panels
• Locating connector pinouts
• Accessing difficult wiring locations
• Installing splice connectors

The CANCrocodile eliminates much of this effort.

Installers can often complete the connection in minutes.

3. Eliminate Risk of Network Interference

One of the biggest concerns when connecting to a CAN network is accidentally affecting communication.

The CANCrocodile operates entirely in a passive listening mode and does not transmit messages onto the network. This means it cannot interfere with vehicle operation, introduce bus errors, or alter existing traffic.

4. Improve Reliability

Every electrical connection represents a potential failure point.

Loose connectors, poor crimps, corrosion, and vibration can all create intermittent issues.

Because the CANCrocodile does not require electrical contact with the CAN conductors, many of these failure mechanisms are eliminated entirely.

Ideal Applications

Fleet Management Systems

Fleet operators increasingly depend on vehicle data for:

• Fuel consumption monitoring
• Driver behavior analysis
• Engine diagnostics
• Maintenance scheduling
• Route optimization

The CANCrocodile enables rapid installation of telematics hardware without modifying the vehicle wiring harness.

Heavy-Duty Trucks and SAE J1939 Networks

Heavy-duty vehicles often use SAE J1939 communication networks carrying information such as:

• Engine speed
• Vehicle speed
• Fuel rate
• Engine temperatures
• Oil pressure
• Diagnostic information

The CANCrocodile is fully compatible with high-speed CAN networks including SAE J1939.

Construction and Agricultural Equipment

Construction machinery and agricultural equipment frequently operate in harsh environments where wiring harness integrity is critical.

The contactless approach minimizes installation risk while still providing access to valuable operational data.

Marine Electronics and NMEA 2000

Marine systems based on NMEA 2000 use CAN technology as their physical layer.

The CANCrocodile can be used in applications where temporary monitoring or data collection is required without modifying existing marine wiring.

Engineering and Diagnostic Work

Engineers and service technicians often need temporary access to CAN traffic for:

• Debugging
• Reverse engineering
• Performance analysis
• Data logging

The contactless design allows quick deployment and removal without affecting the original system.

What the CANCrocodile Does Not Do

The contactless concept offers tremendous advantages, but it is important to understand its intended purpose.

The CANCrocodile is designed for passive monitoring and data acquisition.

Because it does not establish an electrical connection to the CAN bus, it cannot transmit messages onto the network. As a result, it is not suitable for applications that require:

• ECU programming
• Diagnostic requests
• Active control functions
• Sending J1939 request messages
• CAN message injection

For those applications, a traditional CAN interface with a direct electrical connection remains necessary.

Supported CAN Networks

The CANCrocodile supports standard high-speed CAN networks, including:

• SAE J1939
• CANopen
• DeviceNet
• NMEA 2000
• OBD-II CAN-based systems
• Industrial CAN applications

Supported data rates typically range from 5 kbps to 1 Mbps.

A Smart Solution for Modern Vehicle Data Acquisition

As vehicles and machines become increasingly connected, access to CAN bus data becomes more valuable than ever.

Yet many organizations remain hesitant to modify factory wiring or install intrusive monitoring equipment.

The CANCrocodile Contactless CAN Bus Reader offers an elegant alternative:

• No wire cutting
• No insulation piercing
• No electrical connection
• No impact on bus operation
• Fast installation
• Reliable passive monitoring

For telematics providers, fleet operators, engineers, researchers, and system integrators, it represents one of the simplest and safest ways to access valuable CAN bus information.

If your application requires listening to CAN traffic while preserving the integrity of the original system, the CANCrocodile may be the ideal solution.

Automotive CAN Bus and In-Vehicle Networks

Today’s vehicles are more computerized than ever before. From engine management and electric drive systems to lighting, braking, infotainment, and advanced safety features, nearly every function relies on electronic communication. At the center of this digital ecosystem is the CAN Bus (Controller Area Network), a robust communication network that enables electronic control units (ECUs), sensors, and other devices to exchange information quickly, efficiently, and reliably.

As vehicle technology continues to evolve, so do the challenges faced by technicians. Modern vehicle networks have significantly reduced wiring complexity, making vehicles lighter, more efficient, and easier to manufacture. However, this increased reliance on data communication has also made fault diagnosis more demanding. Identifying a network-related problem often requires a different skill set than traditional electrical troubleshooting—particularly for independent repair shops and technicians who may not have access to expensive manufacturer-specific diagnostic tools.

This book is written for automotive technicians, students, educators, and anyone seeking a practical understanding of vehicle communication networks. Whether you are new to automotive electronics or looking to expand your diagnostic capabilities, this guide explains how CAN Bus and other in-vehicle networks are structured, how they operate, and how to diagnose network-related issues using tools that are readily available and affordable.

Inside, you will learn:

• How CAN Bus and other vehicle networks are organized and operate
• The role of ECUs, sensors, gateways, and communication protocols
• Practical techniques for diagnosing network and communication faults
• Step-by-step testing procedures using commonly available tools
• Real-world troubleshooting examples that build confidence and diagnostic skills

By the end of this book, you will have a solid foundation in vehicle network technology and a practical approach to diagnosing the communication systems that power today’s automobiles. More information...

Engineers working with SAE J1939 networks often face the same challenges:

• “I can see CAN traffic, but I don’t know what it means.”
• “I need to test my software without having access to a vehicle.”
• “I need to simulate an ECU.”
• “I need to record data and analyze it later.”
• “I need to verify that my PGNs are transmitted correctly.”
• “I need a J1939 interface that handles the protocol details for me.”

The combination of the JCOM1939 Monitor software and the JCOM.J1939 gateway series was designed specifically to solve these problems. Instead of forcing engineers to build custom software, decode raw CAN frames, or implement complex J1939 protocol layers, the system provides a ready-to-use platform for monitoring, recording, analyzing, simulating, and developing SAE J1939 applications.

The Engineering Challenge

SAE J1939 is not simply CAN Bus.

While CAN analyzers display message identifiers and data bytes, SAE J1939 adds:

• Parameter Group Numbers (PGNs)
• Source and destination addresses
• Network management
• Address claiming
• Transport Protocol (TP)
• Request/response mechanisms
• Diagnostic messages
• Multi-packet transfers

For many development projects, engineers spend more time building test tools than developing the actual application.

The result is often:

• Delayed projects
• Incomplete testing
• Difficult troubleshooting
• Expensive field testing
• Dependence on vehicle availability

The JCOM1939 platform eliminates these obstacles by providing both the hardware interface and the software tools needed for J1939 development and diagnostics.

Solution Overview

The system consists of two major components:

JCOM.J1939 Gateway

A dedicated hardware interface that connects:

• Heavy-duty vehicle networks
• Diesel engines
• ECUs
• Agricultural equipment
• Marine systems
• Industrial machinery

to:

• Windows PCs
• Embedded computers
• Raspberry Pi systems
• Linux systems
• Custom applications

The gateway handles critical SAE J1939 protocol functions internally, including:

• Address claiming
• Network management
• Transport Protocol processing
• Automatic baud rate detection

This removes substantial software complexity from the host system.

JCOM1939 Monitor

A Windows application that transforms the gateway into:

• J1939 monitor
• Data recorder
• ECU simulator
• Network scanner
• Test platform
• Development environment

without requiring custom programming.

Problem #1: “I Need to See What’s Happening on the Network”

Solution: Real-Time J1939 Monitoring

One of the biggest challenges in J1939 development is understanding network activity.

Instead of displaying raw CAN frames, the JCOM1939 Monitor presents information in terms that J1939 engineers actually use:

• PGN
• Source Address
• Destination Address
• Priority
• Message Length
• User-defined descriptions

This dramatically reduces the time required to identify:

• Missing messages
• Incorrect source addresses
• Communication failures
• Unexpected network traffic

Engineers can focus on the application instead of decoding raw CAN identifiers.

Problem #2: “The Network Is Too Busy”

Solution: Intelligent PGN Filtering

Modern vehicles can generate thousands of messages per minute.

Without filtering, valuable information becomes buried in irrelevant traffic.

The JCOM1939 Monitor allows engineers to:

• Display only selected PGNs
• Create custom PGN lists
• Focus on specific subsystems
• Isolate problem areas

Whether monitoring engine speed, fuel consumption, transmission data, or diagnostics, only the relevant information appears on screen.

Problem #3: “I Need to Simulate an ECU”

Solution: Full ECU Emulation

Many projects require more than passive monitoring.

Examples include:

• Dashboard development
• Telematics systems
• Gateway testing
• Fleet management software
• Instrument clusters
• Diagnostic tools

The JCOM1939 Monitor allows users to create a complete virtual ECU with:

• Preferred address
• Address range
• NAME configuration
• Address claiming support

The software participates in network management just like a real ECU.

Problem #4: “I Don’t Have Access to a Vehicle”

Solution: Vehicle-Free Development

One of the most expensive aspects of J1939 development is vehicle access.

Vehicles may be:

• Located off-site
• In active service
• Under customer control
• Available only during limited time windows

Using the JCOM1939 Monitor, engineers can generate realistic SAE J1939 traffic without requiring:

• Trucks
• Buses
• Agricultural equipment
• Construction machinery
• Marine engines

Development can continue in the office, laboratory, or home environment.

Problem #5: “I Need Realistic Sensor Data”

Solution: Analog and Digital Signal Simulation

The software includes dedicated tools for simulating:

Analog Signals

Examples:

• Engine speed
• Oil pressure
• Fuel level
• Coolant temperature
• Vehicle speed

Values can be adjusted dynamically and transmitted at user-defined rates.

Digital Signals

Examples:

• Switch states
• Status indicators
• Warning lamps
• Binary control signals

Digital parameters can be manipulated through a simple graphical interface.

Problem #6: “I Need to Test Request/Response Messages”

Solution: Automated Request Handling

Many J1939 functions rely on requests rather than periodic broadcasts.

Examples include:

• VIN retrieval
• Software identification
• Component identification
• Configuration data

The JCOM1939 Monitor allows engineers to:

• Create request messages
• Define responses
• Verify application behavior
• Simulate real-world ECU interactions

This is especially valuable for application validation and interoperability testing.

Problem #7: “I Need to Know What Devices Are on the Network”

Solution: Network Scanner

Discovering network topology can be difficult, especially on large machines.

The built-in network scanner automatically identifies:

• Active ECUs
• Source addresses
• Device NAMEs
• Network participants

Instead of manually analyzing address-claim traffic, engineers receive a clear overview of the network structure.

Problem #8: “I Need Data for Reports and Analysis”

Solution: Data Recording

The recorder function allows users to store filtered J1939 traffic in CSV format.

Applications include:

• Vehicle validation
• Long-term testing
• Performance analysis
• Failure investigation
• Customer support
• Documentation

Because the output is CSV-based, data can be imported directly into:

• Microsoft Excel
• MATLAB
• Python
• Database systems
• Reporting tools

for further analysis.

Problem #9: “I Need to Build My Own Software”

Solution: Open Programming Interface

Many engineers eventually move beyond monitoring and need custom applications.

The JCOM.J1939 gateways provide a documented serial protocol and programming interface with sample source code for Windows and Linux environments. This enables developers to create:

• Telematics systems
• Embedded controllers
• Data loggers
• Raspberry Pi applications
• Cloud gateways
• Fleet management systems

without having to implement the lower-level J1939 protocol themselves.

Typical Applications

The JCOM1939 platform is particularly valuable for:

Product Development

• New ECU development
• Dashboard design
• Display systems
• Embedded applications

Diagnostics

• Troubleshooting communication issues
• Validating ECU operation
• Network verification

Education

• Learning SAE J1939
• University projects
• Technical training

Fleet Solutions

• Data collection
• Vehicle monitoring
• Telematics development

Prototype Development

• Rapid proof-of-concept creation
• Bench-top testing
• Software validation

Why Engineers Choose the JCOM1939 Platform

Most J1939 tools focus on either:

• Monitoring only
• Simulation only
• Hardware only

The JCOM1939 Monitor and JCOM.J1939 gateways combine:

• Monitoring
• Recording
• Network scanning
• ECU simulation
• Request/response testing
• Analog signal simulation
• Digital signal simulation
• Application development support

into a single integrated environment. The gateway performs the heavy lifting of SAE J1939 protocol processing while the software provides a practical engineering interface for testing, troubleshooting, and development.

More Than a Product Website: A Complete SAE J1939 Resource Center

To better serve the SAE J1939 community, we have created a dedicated website focused exclusively on the JCOM1939 Monitor software and the JCOM.J1939 gateway product family. While the site provides comprehensive information about the software, hardware, features, and applications, it is much more than a product catalog. Our goal is to make it a valuable resource for engineers, developers, students, and anyone working with SAE J1939 networks.

In addition to detailed product documentation, the website contains a growing collection of educational material covering SAE J1939 fundamentals, network architecture, PGNs, diagnostics, ECU communication, software development, and practical implementation techniques. Whether you are evaluating a J1939 solution, troubleshooting an existing system, or simply looking to expand your understanding of the protocol, the site offers a wealth of information designed to help you succeed in your J1939 projects.

Conclusion

The true value of the JCOM1939 Monitor is not that it displays J1939 traffic. Many tools can do that.

Its value lies in reducing development time, eliminating the need for vehicle access during much of the development cycle, simplifying troubleshooting, and providing a complete environment for monitoring, recording, simulation, and testing.

For engineers developing J1939-based products, the combination of the JCOM1939 Monitor and JCOM.J1939 gateways functions as a complete J1939 laboratory on the desktop, enabling faster development, faster debugging, and faster time-to-market. More information...

SAE J1939 Starter Kit And Network Simulator

Our JCOM.J1939 Starter Kit and Network Simulator is built for both seasoned engineers and beginners who want to explore SAE J1939 data communication without relying on a real-world vehicle network such as a diesel engine.

To create a functioning network, you always need at least two nodes. This requirement is particularly important with CAN/J1939, where a single CAN controller will shut down if it transmits data but receives no response.

That’s why our Starter Kit includes two fully functional J1939 nodes. At its core is the JCOM.J1939.USB, an SAE J1939 ECU Simulator Board with a USB interface. Together, these nodes provide a self-contained test environment where you can send, receive, and analyze J1939 messages, experiment with network traffic, and develop applications — all without connecting to an actual engine or vehicle system. More information...

All of this information travels across the vessel’s NMEA 2000 network.

For years, accessing that data meant purchasing expensive marine displays or proprietary software. But what if you could capture the data directly using a small ESP32-based device and send it to a computer, tablet, smartphone, or custom application via USB or Bluetooth?

The possibilities are surprisingly extensive.

Turning Your Boat into a Data Platform

Think of an NMEA 2000 network as the boat’s nervous system. Every device contributes information, and every device can potentially benefit from information provided by others.

By extracting that data and making it available to external applications, you gain access to capabilities that traditional chartplotters often don’t provide.

Instead of simply viewing data, you can analyze it, store it, visualize it, automate actions, and combine it with information from other sources.

Engine Monitoring and Diagnostics

One of the most popular uses is monitoring engine performance.

Applications can display:

• Engine RPM
• Coolant temperature
• Oil pressure
• Fuel rate
• Fuel economy
• Engine hours
• Alternator voltage
• Diagnostic information

Data can be logged continuously and reviewed later. Trends that would otherwise go unnoticed can become obvious.

For example:

• Is fuel consumption gradually increasing?
• Is coolant temperature creeping upward over time?
• Is one engine behaving differently from another?

Historical data often reveals problems long before they become expensive repairs.

Long-Term Voyage Logging

Most chartplotters provide limited logging capabilities.

With direct access to NMEA 2000 data, you can create complete voyage records that include:

• GPS position
• Speed
• Heading
• Engine data
• Wind conditions
• Water depth
• Battery status

The data can be stored locally or uploaded to cloud services for later analysis.

Many boat owners enjoy reviewing trips after returning to port. Others use the information for maintenance planning or fuel management.

Fuel Management and Cost Analysis

Fuel is one of the largest operating expenses for many vessels.

By recording fuel flow and vessel speed, software can calculate:

• Fuel economy
• Cost per nautical mile
• Optimal cruising speeds
• Fuel efficiency versus sea conditions
• Long-term fuel consumption trends

A few percent improvement in fuel efficiency can result in significant savings over a season.

Custom Dashboards

Not everyone likes the layout provided by commercial displays.

With access to raw NMEA 2000 data, developers can build custom dashboards for:

• Windows PCs
• Mac computers
• Android tablets
• iPads
• Smartphones

You decide exactly what information appears on the screen and how it is presented.

Some users prefer large engine gauges. Others want detailed numerical data or graphical trend displays.

Remote Monitoring

Imagine sitting in your cabin, at home, or in a marina office while monitoring key vessel parameters.

Applications can forward NMEA 2000 data through Wi-Fi, cellular networks, or satellite connections.

Possible uses include:

• Monitoring battery banks
• Checking bilge status
• Watching tank levels
• Tracking vessel position
• Receiving alarms

This capability is becoming increasingly popular among boat owners and fleet operators.

Data Logging for Maintenance

Maintenance decisions are often based on operating hours.

However, operating conditions can be just as important.

By recording NMEA 2000 data, you can answer questions such as:

• How many hours did the engine spend above 80% load?
• How often did coolant temperature approach warning levels?
• How many charging cycles did the battery bank experience?

This information can support predictive maintenance strategies rather than relying solely on fixed service intervals.

Research and Product Development

Marine equipment manufacturers and developers frequently need access to real-world vessel data.

An ESP32-based NMEA 2000 interface can become a powerful development tool for:

• Sensor testing
• Product validation
• Performance studies
• Data collection projects
• Academic research

Instead of investing in expensive proprietary monitoring systems, developers can collect data directly from the network.

Home Automation and IoT Integration

One of the more interesting applications involves integrating vessel data with modern IoT systems.

Examples include:

• Automatically activating cabin ventilation when temperatures rise.
• Sending text alerts when batteries reach critical levels.
• Triggering maintenance reminders.
• Uploading voyage statistics to cloud dashboards.
• Integrating boat data with home automation systems.

The ESP32 is particularly attractive for these projects because it already includes Wi-Fi and Bluetooth connectivity.

Building Your Own Marine Applications

Perhaps the most exciting possibility is the ability to create entirely new applications.

Developers can combine NMEA 2000 data with:

• Weather services
• Cloud databases
• Artificial intelligence
• Mapping software
• Fleet management systems
• Mobile applications

The result can be solutions tailored to specific boating, fishing, racing, charter, or commercial operations.

Why USB and Bluetooth Matter

USB connectivity provides a simple way to connect directly to PCs, laptops, and embedded systems.

Bluetooth adds another level of flexibility by allowing smartphones and tablets to receive data wirelessly without additional networking hardware.

Together, these interfaces make NMEA 2000 data accessible to virtually any modern computing device.

The Bottom Line

An ESP32-based NMEA 2000 data gateway is far more than a simple protocol converter.

It transforms the vessel’s network into an open data source that can power monitoring systems, maintenance tools, custom dashboards, mobile applications, cloud services, research projects, and entirely new marine technologies.

Once NMEA 2000 data is available through USB or Bluetooth, the real question is no longer “What data can I access?”

It’s “What would you like to build with it?”

ESP32S3 CAN-Bus Board with NMEA2000 Connector

The ESP32-S3 CAN-Bus Board with NMEA 2000 Connector is a powerful development platform designed for engineers, makers, and marine electronics developers who need seamless access to NMEA 2000 networks. Built around the high-performance ESP32-S3 processor, the board combines dual-core processing, integrated Wi-Fi, Bluetooth LE, 8 MB Flash, and 8 MB PSRAM with an onboard CAN transceiver and native NMEA 2000 connectivity. This unique combination allows developers to rapidly create smart marine devices, wireless gateways, data loggers, cloud-connected monitoring systems, and custom vessel instrumentation without the complexity of designing CAN hardware from scratch.

Whether you’re building the next generation of marine IoT products, collecting vessel data for remote diagnostics, or integrating sensors into an NMEA 2000 backbone, this board provides a fast path from concept to deployment. The integrated USB-C interface simplifies programming and debugging, while the wide 7V–24V power input and I²C expansion connector support real-world marine installations and sensor integration. With extensive example code, documentation, and support for modern ESP32 development tools, the ESP32-S3 CAN-Bus Board with NMEA 2000 Connector delivers a professional-grade foundation for innovative marine networking and embedded system projects. More information...

When engineers design communication systems for vehicles, industrial machinery, agricultural equipment, marine electronics, and embedded control systems, reliability is often more important than raw speed.

A lost message in a music streaming application may go unnoticed. A lost message containing engine speed, brake status, steering angle, or hydraulic pressure can lead to equipment malfunction, downtime, or even safety hazards.

This is exactly why the Controller Area Network (CAN) Bus was developed.

More than three decades after its introduction by Bosch, CAN Bus remains one of the most reliable communication technologies ever created. It continues to serve as the backbone of modern vehicles, industrial automation systems, agricultural equipment, marine electronics, and countless embedded applications.

But what makes CAN Bus so reliable compared to technologies such as RS232 or even Ethernet?

Let's take a closer look.

The Problem with Traditional Serial Communication

Before CAN Bus became popular, many embedded systems relied on point-to-point serial interfaces such as RS232.

In an RS232 network:

• Devices communicate directly with each other.
• There is no built-in arbitration.
• Error handling is limited.
• A transmitter has no knowledge of whether another device is transmitting simultaneously.
• Message delivery is generally not acknowledged at the network level.

If electrical noise corrupts a message, the receiver may detect the error, but recovery mechanisms are usually left to the application software.

As systems become larger and more complex, these limitations become increasingly problematic.

CAN Bus Was Designed for Harsh Environments

The automotive industry presented a unique challenge.

Modern vehicles contain dozens of electronic control units (ECUs) that must exchange information continuously.

Examples include:

• Engine Controller
• Transmission Controller
• Brake Controller
• Instrument Cluster
• Body Controller
• Telematics System
• Electric Power Steering

All of these devices share the same network.

The CAN Bus protocol was specifically designed to allow multiple devices to communicate simultaneously while maintaining extremely high reliability in electrically noisy environments.

No Message Collisions Through Non-Destructive Arbitration

One of the most impressive features of CAN Bus is its arbitration mechanism.

In many communication systems, two devices transmitting simultaneously cause a collision. Both messages are destroyed and must be retransmitted later.

Ethernet networks historically suffered from this issue through a mechanism known as CSMA/CD (Carrier Sense Multiple Access with Collision Detection).

CAN Bus takes a completely different approach.

When multiple nodes begin transmitting at the same time:

1. Each node monitors the bus while transmitting.
2. Message identifiers participate in arbitration.
3. The highest-priority message automatically wins.
4. Lower-priority nodes immediately stop transmitting.
5. No data is corrupted.

This process occurs within microseconds.

The winning message continues without interruption, while losing nodes simply retry later.

As a result:

• No bandwidth is wasted.
• No message corruption occurs.
• Critical messages always get through first.

This feature alone contributes enormously to CAN Bus reliability.

Message Priorities Guarantee Deterministic Behavior

Every CAN message contains an identifier.

Unlike Ethernet packets or RS232 data streams, the identifier is not merely an address—it also determines message priority.

For example:

• Brake messages can receive higher priority.
• Steering messages can receive higher priority.
• Diagnostic messages can receive lower priority.

During bus arbitration, the highest-priority message wins.

This deterministic behavior is particularly important in:

• Automotive systems
• Agricultural equipment
• Mining trucks
• Industrial machinery
• Marine control systems

Critical information never has to wait behind less important traffic.

Built-In Error Detection

CAN Bus continuously checks message integrity.

Every transmitted frame includes multiple layers of error detection.

These include:

Bit Monitoring

Transmitters continuously compare transmitted bits against actual bus levels.

If a mismatch occurs, an error is detected immediately.

Bit Stuffing Check

Special bit-stuffing rules ensure proper synchronization.

Violations trigger automatic error detection.

CRC Verification

Every CAN frame includes a Cyclic Redundancy Check (CRC).

Receivers independently calculate the CRC and compare the result.

Any discrepancy identifies corrupted data.

Frame Format Verification

Receivers validate frame structure.

Malformed frames are rejected automatically.

Acknowledgment Checking

Receivers acknowledge successful reception.

Missing acknowledgments indicate communication problems.

Together, these mechanisms provide multiple layers of protection against corrupted data.

Automatic Retransmission

One of the strongest reliability features of CAN Bus is automatic retransmission.

Suppose electrical noise corrupts a message.

The receiving nodes detect the error and immediately generate an error frame.

The original transmitter automatically retransmits the message.

No application software intervention is required.

This process is handled entirely by the CAN controller hardware.

For software developers, this means:

• Simpler applications
• Greater reliability
• Reduced development effort

Rapid Error Recovery

CAN Bus not only detects errors—it actively manages faulty nodes.

Every controller maintains:

• Transmit Error Counter (TEC)
• Receive Error Counter (REC)

If a node repeatedly causes errors, it transitions through several states:

Error Active

Normal operation.

Error Passive

Node remains operational but becomes less disruptive to the network.

Bus Off

The faulty node disconnects itself from the network.

This self-isolation prevents one defective device from bringing down the entire bus.

Once the problem is corrected, the controller can rejoin the network.

This mechanism significantly increases overall system robustness.

Differential Signaling Improves Noise Immunity

Unlike RS232, CAN Bus uses differential signaling.

Two wires carry opposite signal levels:

• CAN_H
• CAN_L

Receivers measure the voltage difference between the two signals.

Electrical noise typically affects both wires equally.

Since the receiver only looks at the difference, most noise is automatically rejected.

Benefits include:

• Improved noise immunity
• Longer cable lengths
• Better performance in industrial environments
• Greater reliability in vehicles

This is one reason why CAN Bus works exceptionally well in environments filled with motors, alternators, relays, pumps, and switching power supplies.

CAN Bus Versus Ethernet

Ethernet dominates office and IT networks because of its speed.

However, reliability in real-time control applications involves more than bandwidth.

Ethernet Advantages

• Extremely high throughput
• Standardized infrastructure
• Easy Internet connectivity

CAN Bus Advantages

• Deterministic message priority
• Hardware-level arbitration
• Automatic retransmission
• Built-in fault confinement
• Lower implementation complexity
• Superior performance in embedded control systems

For applications requiring real-time control, CAN Bus often remains the preferred solution despite Ethernet's higher data rates.

This explains why many modern vehicles use both technologies:

• Ethernet for cameras and infotainment
• CAN Bus for real-time control and diagnostics

Why Engineers Continue to Choose CAN Bus

Even after decades of technological advancement, CAN Bus remains one of the most trusted communication technologies available.

Its success is built on several key principles:

• Non-destructive arbitration
• Deterministic message prioritization
• Multiple layers of error detection
• Automatic retransmission
• Fault confinement
• Exceptional noise immunity
• Low hardware complexity

These features combine to create a network that can operate reliably for years in some of the harshest environments imaginable.

That level of reliability is difficult to achieve with many other communication technologies.

Explore CAN Bus Development Solutions from Copperhill Technologies

If you're developing CAN Bus applications, Copperhill Technologies offers a wide range of hardware solutions for engineers, developers, researchers, and educators.

Our product line includes:

• CAN Bus interfaces for Raspberry Pi...
• CAN Bus solutions for ESP32 and ESP32-S3...
• CAN Bus interfaces for Teensy...

Whether you're building industrial automation systems, vehicle diagnostics applications, marine electronics, agricultural equipment interfaces, or embedded control systems, our hardware provides a fast path from concept to deployment.

Visit Copperhill Technologies to explore our complete range of CAN Bus development products and solutions.

Conclusion

CAN Bus earned its reputation through engineering excellence rather than marketing hype.

Its ability to prevent message collisions, detect and recover from errors, isolate faulty nodes, and operate reliably in electrically noisy environments has made it the communication backbone of millions of systems worldwide.

For engineers who value reliability, deterministic behavior, and robust operation, CAN Bus remains one of the most effective communication technologies ever developed.

ESP32S3 Board with CAN FD and Classical CAN Ports

The ESP32-S3 Board with CAN FD and Classical CAN Ports combines the processing power and wireless connectivity of Espressif’s ESP32-S3 with advanced CAN networking capabilities in a compact development platform. Based on the ESP32-S3-WROOM-1-N8R8 module, the board features a dual-core 240 MHz processor, 8 MB Flash, 8 MB PSRAM, integrated Wi-Fi, Bluetooth 5, Bluetooth Low Energy (BLE), and native Classical CAN support. For next-generation networking applications, CAN FD functionality is provided through the onboard Microchip MCP2518FD controller, allowing developers to work with both legacy CAN 2.0 and modern CAN FD systems on a single platform.

Designed for automotive, industrial, and IoT applications, the board includes high-speed CAN transceivers, a USB-C programming interface, an I²C expansion connector, RGB status LED, and a wide-range 7 V to 24 V power supply with reverse-polarity protection. The combination of wireless connectivity and CAN/CAN FD networking makes it an excellent platform for gateways, data loggers, cloud-connected monitoring systems, vehicle diagnostics, industrial automation, and embedded control applications. Whether you are bridging CAN data to Wi-Fi, implementing a CAN FD gateway, or developing connected industrial devices, the board provides a powerful and flexible foundation for rapid prototyping and product development. More information...