PLT-OS v1.9


PLT-OS v1.9.x is a maintenance-only release track supporting PLT-200A and PLT-300A, and is no longer recommended for new projects.


PLT-OS v1.9.x introduced a new system partition sizing, to allow for supporting programming targets and other enhancements. This makes PLT-OS v1.9.x unable to revert to pre-v1.8 PLT-OS versions.

If a unit running v1.9.x needs to be downgraded to a pre-v1.8 version, it should first be downgraded to the most recent PLT-OS v1.8 release.

PLT-OS v1.9.15

Bugs fixed:

  • PLTOS-214: Fix uart send param propagation

  • webserver: title: PLT-300A, not PLT-300

New features:

  • LY11-589: measure continuity with DMM

  • PLTOS-120: continuous measurements with JouleScope js 220

  • TGT-69: Program RP2040 via SWD

PLT-OS v1.9.14

Bugs fixed:

  • LY11-542: Reset RDTP signals during fixture adapter reset

  • PLTOS-211: UART Extract Not Working in 1.9.13.

  • PLTOS-213: Programming fails when filename extracted from key

  • usb detect: interpret path as user path


  • PLTOS-15: report: Include failure error hash

  • identify: Support STM32H7

PLT-OS v1.9.13

Bugs Fixed:

  • PLTOS-193: Add support for Zebra ZD421 label printer.

  • PLTOS-198: Fix an “Error Retrieving Update” in some cases where no update was available.

  • PLTOS-202: Stop retries upon operator abort

New Features:

  • PLTOS-195: Increase UART log limit to 256KiB of data.

PLT-OS v1.9.12

New features:

  • PLTOS-4: Specify hex values directly for UART commands.

  • Add support for the Microchip/Atmel ATSAMG5x family of MCUs.

  • PLTOS-187: Support disableAutoRange for resistance measurements, improved resistance measurement speed.

Bugs fixed:

  • PLTOS-196: The uartCfg command was ignoring the interface field.

  • PLTOS-220: Improved PLT enrollment process.

  • PLTOS-189: Better error reporting for program, erase, and identify commands.

PLT-OS v1.9.11

New features:

  • PLTOS-176: Support for ACS ACR1252U NFC Reader/Writer

  • PLTOS-185: NFC NTAG Detect Command

Bugs fixed:

  • PLTOS-187: Fixed “Unknown UART” issue introduced in PLT-OS v1.9.10.

PLT-OS v1.9.10

New features:

  • PLTOS-3: Add timeout: field for all commands.

  • PLTOS-154: Support for using external FTDI adapters for programming DUTs.

  • PLTOS-167: Support for Configuring Additional UART/Serial Interfaces.

  • PLTOS-171: Support for specifying path for ST-Link, J-Link, CMSIS-DAP, and KitProg USB-attached programmers.

  • PLTOS-178: Added bytes() function to the eval command to allow creating arbitrary byte arrays.

Bug fixes:

  • PLTOS-158: Catch panic on test plan execution

  • PLTOS-160: Address intermittent errors with ADC current measurements.


  • Build system and toolchain improvements.

  • PLTOS-157: Remove ‘ftdiCfg’ command

PLT-OS v1.9.5 - 1.9.9

Not released publicly.

PLT-OS v1.9.4

New features:

  • TGT-83: Program ACG1F

PLT-OS v1.9.3

New features:

  • Program STM32G4 family MCUs.


  • PLTOS-87: Optional message parameter for the sleepms command.

  • PLTOS-119: The eval command now supports parsing hex literals.

  • PLTOS-140: Test plans can now specify test runner constraints (OS version, PPC ID, etc).

PLT-OS v1.9.2

New features:

  • Program Analog Devices MAX32690WLP.

  • Debug Mode web control interface on port 8000.

  • PLTOS-146: Support for latest PLT-300A display module revision.

  • PLTOS-132: Improved NTP server selection via DHCP.

PLT-OS v1.9.0

New features:

  • Program Analog Devices MAX32690.


  • New system partition sizing to allow room for future development. This expansion will make it possible for us to add support for more programming targets and other enhancements.

  • System library and kernel updates to pickup the latest security and reliability enhancements.

  • PLTOS-132: Set NTP servers based on dhcp response

  • PLTOS-134: Capture mac address in device shadow