Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[v1.2.0] - 2025-11-19

Features

• Colour Palette & Theme: Update dark and light colour schemes. The default theme is now Light, and the app automatically applies the user’s preferred theme on startup.
• Spectral Deconvolution:
  • Add Spectral Deconvolution feature under Advanced Settings. This allows the application of Wiener filter deconvolution to spectral data.
  • Updated file saving structure when filter is applied:
    • New Filter field in metadata, holds the name of the applied filter along with relevant function parameters.
    • Files include both unfiltered (columns Pixel[0:2047]) and filtered (columns FilteredPixel[2048:4095]) data.
    • The first three rows (wavelength, background, reference) always store unfiltered data in both sections.
    • Subsequent data rows represent unfiltered values on the left and filtered values on the right — consolidated into a single file for easier comparison and analysis.
• Add trigger slope selection, rising or falling edge, under More saving options>Time series of spectra>External trigger. Available for serial numbers where the first two digits are 24 or higher (e.g., 2400s000).
• Status Logging (available for instruments manufactured from December 2025 onward):
  • Instrument Status: Add indicator that mirrors the instrument’s LED. The indicator changes colour to reflect instrument status, and hovering over it shows detailed status information.
  • Temperature Logging: Add logging of instrument temperatures. Temperatures are saved to files and can also be monitored in the Band Monitoring tab. See the manual for details.
• Band Monitoring:
  • Add option to choose between a data count limit or a time-based limit.
  • Add option to automatically create a file when monitoring starts. When enabled, a file is created at the start of monitoring and any data will be appended to it. When disabled, no file is created - useful for viewing data on screen without saving it.
• Multi-instrument support:
  • Added support for using multiple devices simultaneously.
    • If no devices are connected, the app waits until one is connected.
    • If a single device is connected, the app automatically connects to it.
    • If multiple devices are connected, the user is prompted to choose the desired device.
  • Multiple instances of the app can be opened, each connected to a different device.
  • Note: Status logging is not available when multiple instruments are connected.

Changes

• Device reconnection:
  When a device is disconnected, the app now waits for the same serial number to reconnect, rather than automatically connecting to any available device.
• Configuration & Error Logging:
  • Update configuration file directory to config_local_dir (C:\Users\x\AppData\Local\nlir.com\nlizer).
  • Log files are now stored in C:\Users\x\AppData\Local\nlir.com\nlizer\Logs with file rotation support: each file is limited to 8 MB, up to 8 files are retained, and filenames now use a numbered format (e.g., NLIR_Logging_r00001.log) instead of datetime.

Bug fixes

• Trigger mode: Fix a bug that caused trigger mode to freeze.
• Band Monitoring:
  • Resolve an issue where .bb.csv appeared incorrectly as a selectable file format.
  • Fix bug that allowed monitoring to start with an empty filename field.
  • The Trace Mode in the saved band monitoring file is now set as “Raw, unless in Response Correction mode, where it is set as”ResponseCorrection”. Previously, it could be misclassified as “Transmission” or “Absorbance”.
• Load Data: Disable the “Reload File Settings” button when file is missing.

[v1.1.0] - 2025-05-05

Features

• Add .bb.csv file format.
• Add Response Correction functionality.
• Add a “Check for updates” button in the About tab to manually check for available updates.

Changes

• Change Y-axis autoscaling behavior to scale based on the maximum visible value, rather than the maximum of the full dataset.

Bug fixes

• Fix an issue where the capture mode field was incorrectly included in the metadata when saving a file with metadata in JSON format, even for non-multi-spectral files.
• Reset all traces (including background and reference) when switching devices to prevent confusion caused by differing x-axes.

[v1.0.2] - 2025-02-26

Changes

• Disable burst mode for AGS spectrometers.
• Fix estimated run time for burst mode.
• Add note on ui for multi-spectra, that in burst or triggered modes the number of averages is not taken into account.

Bug fix

• Fix issue in trigger mode.

[v1.0.1] - 2025-02-21

Features

• Add reset button for Gain and Offset.

Bug Fix

• Fix bug in Band Monitoring when multiple bands are selected, causing incorrect plot data for band 2 and band 3. The issue occurred due to failure in clearing band 2 and band 3 data after completing a measurement or when the maximum data capacity was reached.

[v1.0.0] - 2025-02-10

Initial Release

• First stable release of NLIzeR.