SOTACAT firmware update (for Elecraft KX2 / KX3 users)

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The SOTACAT add-on WiFi module for Elecraft KX2 / KX3 users has a new firmware available:

Version 251004:1346-R (2025-10-04 13:46 Release)

And for those who don’t know what a SOTACAT is, you can read about it here:

Changes:

  • Support for Web SDR integration: when you “click to pounce” on a spot frequency, it not only tunes your Elecraft to that spot frequency but (optionally) can also launch a new web browser tab to a WebSDR URL for that spot. This is useful for home stations that want to efficiently chase (listen to your local WebSDR, transmit from your Elecraft). (AB6D)

  • Improved developer build experience (KC6X)

  • Moved the “Launch SOTAMAT” button from SOTA/POTA pages to the CAT page (KC6X)

  • Changed service that does IP address to Lat, Long from one that uses HTTP to one that uses HTTPS to reduce browser conflicts (AB6D)

  • Moved WiFi help instructions from the page into a popup to make UI more compact (KC6X)

  • Simplified CSS stylesheet code for developers (KC6X)

  • Fixed but #71 - Elecraft wasn’t getting correct LSB/USB mode based on frequency. (AB6D)

  • Make both frequency and mode changes between the radio and the Browser UI bidirectional (KC6X)

  • Made the UI look better in many places (KC6X)

  • Fixed bug with auto-power-off (AB6D)

  • Made SOTAMAT FT8 transmission power level more resilient (read-after-write retry logic) (AB6D)

  • Other minor developer and UI changes

If you haven’t updated in a while, there were a bunch of other improvements made in the June 2025 time frame, so it’s time to update!

Let me know if you have issues…

73 de AB6D - Brian

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