Firmware Updates for OBDLink & OBDLink S

Here you will find short summaries of changes between the different firmware revisions. Developers should read the detailed changelog found inside the respective update archive. To install an update, download and extract the archive, then run StnFirmwareUpdater.exe.

Important Notes

Latest Version 4.2.0

Release Date: February 2, 2017
Level of Importance: Recommended

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This major release fixed several serious bugs including:

• CAN message loss or corruption due to CAN bus errors
• ATPB could cause auto-filtering not to be set up correctly
• Undefined behavior if reset during startup
• ATMA command cleared CAN H/W filter on exit
• ATMP commands cleared all current filters on OUT OF MEMORY error
• ATBI/STPO did not activate pending USER1 protocol configuration changes
• Automatic generation of 11-bit flow control ID pairs for segmented message transmission
• UART transmission lock ups
• ISO 9141 keep-alive messages

The major release added many new features including:

• Turn LEDs off/on
• Extra data parameter for the STPX command
• Set CAN addressing modes
• Set and read CAN timing registers
• Support for 7F xx 78 response pending messages
• Report factory calibration status
• Fail-safe clock monitor
• Complete ISO 15765 multi-frame message support
• CAN Rx multi-frame message assembly
• CAN Tx message segmentation
• Arbitrary OBD message transmission
• Set minimum time between the last OBD response and the next request
• Other stability and performance improvements

See obdlink-changelog.txt inside the archive for detailed descriptions of the changes.

Version 3.3.0

Release Date: September 26, 2012
Level of Importance: Recommended

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This major release fixes a number of serious bugs and introduces many new features.

See obdlink-changelog.txt inside the archive for more details.

Version 3.1.0

Release Date: May 16, 2012
Level of Importance: Recommended

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This major release fixed three serious bugs:

• The device would sometimes lock up while monitoring a busy CAN bus.
• Due to a race condition, heavy UART Tx traffic sometimes would generate FATAL ERROR 0x0101 [5, ...]
• KWP2000 fast init would not work reliably with vehicles that have multiple ECUs responding to StartCommunication message.

The following major new features were implemented:

• New AT and ST commands, including:
  • Set/report protocol
  • Protocol open/close
  • Enable automatic filtering mode
  • Set automatic check byte calculation/checking
  • Set CAN monitoring mode
  • J1939 header formatting, response timeout multiplier
• Ability to turn off J1850 CRC calculation and checking
• Removed length limitation for certain types of messages
• Increased CAN buffer size
• Increased UART buffer size
• Other stability and performance improvements

See obdlink-changelog.txt inside the archive for detailed descriptions of the changes.

Version 2.2.2

This release fixes a few minor bugs and introduces the following new features:

• Voltage-based PowerSave triggers
• Higher precision voltage measurement

See obdlink-changelog.txt inside the archive for more details.

Version 2.1.2

Bugfix release (see obdlink-changelog.txt inside the archive for details).

Version 2.1.0

This release changes default baud rate to 115.2 kbps.

Version 2.0.2

Bugfix release (see obdlink-changelog.txt inside the archive for details).

Version 2.0.1

This major release introduces the following new features:

• PowerSave functionality
• Support for the SAE J1939 (protocol for heavy-duty vehicles)
• Custom CAN protocols
• Support for majority of the new ELM327 v1.4 functionality
• Changes aimed at improving the stability of communication with "problem" vehicles

Previous Releases