If you are already a user and want to check for updates, please start your current version of the JCOM1939 Monitor software and check the version number in the window’s caption (top bar):
If your version is older than the one as shown below, we strongly recommend downloading and installing the newest version.
The JCOM1939 Monitor for Windows is free software; you can redistribute it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License or (at your option) any later version. The program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. With downloading these programs, you confirm that you have read and agree with these terms and conditions.
The newest version is:
V 3.40.01
After downloading the installation program, run the .exe program and follow the instructions on the screen to install the program. This is a standard installation program for Windows; there are no special actions or settings necessary.
Version History
-
V 1.02.00
- First release
-
V 2.00.00
- Periodic messages are managed in gateway instead of Windows software
- Added application file functionality
-
V 3.00.00
- Professional version release
- Replaced Windows control modules to eliminate screen flickering
- Optimized screen update timing
-
V 3.01.00
- Added support for multiple instances of the program to allow connection of several gateways per PC
- Transport Protocol (TP) messages (data frames longer than 8 bytes) cannot be assigned a frequency anymore since that is not part of the J1939 standard
- Misc. memory optimizations
- Misc. speed optimizations
-
V 3.01.01
- Debugging: Checksum and byte stuffing errors plus HW/SW version were only displayed after first heartbeat message
-
V 3.10.00
- Added SAE J1939 Data Recording (new Recorder tab).
-
V 3.10.01
- ACK messages are disabled at program start to reduce data traffic between the gateway and the PC.
- Previous versions allowed to enter a destination address (DA) for a Broadcast PGN, which was ignored but may confuse users. The program now displays a message and sets the DA to the global address 255.
-
V 3.10.02
- Due to the previous software update, the PGN description on the data screen was suppressed.
-
V 3.11.00
- The PGN data display has been extended to indicate whether the SAE J1939 data frame was received or transmitted.
- The software now adds the selected CAN baud rate (250/500k) to the application file.
- Resolved some application file saving issues.
- Added C-tech icon (so far we’ve used the Microsoft Visual Studio default).
-
V 3.20.00
- Editing of Tx Data is now allowed without claiming ECU address first
- Added tab for editing data bytes (simulation of analog parameters)
- Added tab for editing data bits (simulation of digital parameters)
-
V 3.20.01
- Bit Data Editing: The bit sequence text (“8 7 6 5 4 3 2 1”) above the bit checkboxes was reversed.
-
V 3.30.00
- A message request required the data entry field to be filled by the user, otherwise there would be an error message. However, the data entry was not necessary, since it’s being created automatically by the software.
- Added support for new devices with RTC (real-time clock) and SD card.
- Data view table includes time stamps for devices with RTC.
- Heartbeat message was extended to include functionality information (RTC, SD Card).
-
V 3.30.01
- We took care of a bug in the data recording section. The data fields for source address (SA) and destination address (DA) were switched.
-
V 3.31.00
- There is now a new tab “Settings” that allows to individually switch PGN, Source Address (SA), Destination Address (DA), and Data between decimal and hex.
- The Recording file now includes the PGN description.
-
V 3.40.00
- Modified the J1939 data display to accomplish higher display speeds.
- Addressed a bug that prevented saving filter PGNs to the application file in certain cases.
-
V 3.40.01
- Code optimization for new ESP32-based gateways.
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 is an attempt 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 web sites 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…