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 via the OBDLink app, navigate to 'Settings' > 'Firmware Updates', then click 'Check For Updates'
To install an update via a Windows PC, download and extract the archive, then run StnFirmwareUpdater.exe.

Latest Version 5.6.1

Release Date: September 18, 2020
Level of Importance: Recommended

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This major release fixed a few bugs:

• Fixed 7Fxx78 message being counted when using STPTO 0
• Fixed STSLU, STSLVL, and STSLX not working

This release added a few new features and changes:

• Added command to change CAN consecutive and flow control frame reception timeouts
• Added command to specify additional STmin delay
• Added support for 4 byte header to ATSH
• Removed CAN deaf time after sending a CAN message

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

Version 5.5.3

Release Date: June 9, 2020
Level of Importance: Recommended

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This release fixed a serious bug:

• Fixed NVM not retaining settings after firmware update

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

Version 5.5.2

Release Date: June 3, 2020

This release fixed a serious bug:

• Fixed lack of ability to transmit after CAN ERROR

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

Version 5.5.1

Release Date: June 2, 2020

This release fixed a serious bug:

• Fixed FATAL ERROR when using multi-frame reception on CAN

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

Version 5.5.0

Release Date: May 28, 2020

This release fixed a bug:

• Fixed CAN OUT OF MEMORY error introduced by async CAN optimization

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

Version 5.2.0

Release Date: May 10, 2020

This release fixed a few bugs:

• Stopped premature timeout on CAN multi-frame reception
• Fixed a "BUFFER FULL" error on a busy CAN bus

This release also added a new feature and change:

• Added support for 8/7 CAN
• CAN driver improvements
• ELM 1.4b compliance
• "STOPPED" is now printed exiting all monitoring modes

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

Version 5.1.3

Release Date: January 24, 2020
Level of Importance: Recommended

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This release included several changes:

• Set max UART baudrate of EX and SX to 2000000
• Increased UART RX buffer size to accomadate large transfers @ 2Mbps baudrate
• Made default sleep functionality consistent with SX

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

Version 5.1.1

Release Date: October 10, 2019

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Initial Release

Previous Releases