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SMLIGHT
Release notes · Jun 06, 2026 · 2 min read

SLZB-OS v3.3.3.dev1

Improvements

  • Experimental support for SLZB-OS configuration backup/restore.
  • Optimized the processing speed of SSE messages.
  • Added a button to copy the device log.
  • Added autocomplete for the TIMER module.
  • SUN module redesigned — documentation.
  • OTBR on device moves from experimental to beta.
  • U-series coordinators now store a 12× larger device log in PSRAM (50KB vs 4KB).
  • (SLZB-Ultima) New "Audio" page and MP3 audio player support.
  • (SLZB-Ultima) Added new Berry audio player module — documentation.
  • (SLZB-Ultima) Added optional argument for number of repetitions when sending an IR command for the Berry IR module — documentation.
  • (SLZB-Ultima) Improved stability of the Z-Wave addon.
  • (SLZB-Ultima) Improved 4G modem processing.
  • (SLZB-Ultima) The IR receiver is disabled while the transmitter is active.
  • Added a 10s timeout for OTBR startup — if the radio module still does not respond you will see an error on the OTBR page.

Fixes

  • Fixed an OS crash that caused OTBR in some cases.
  • Fixed ZigBee network scanning not working if OTBR is running on radio module 2.
  • Fixed DNS issues for NAPT bridge mode.
  • Fixed SPAM in device log when using the SMLIGHT SLZB integration.

Zigbee Hub

  • Added experimental ZigBee Hub backup functionality.
  • Added missing subscriptions to new zHub control topics (attribute read request, system_control).
  • When creating a new random network, only channels 11, 15, 25 will be used.
  • Automatic firmware updates of the radio module are disabled if the Zigbee Hub is active.
  • Fixed a ZigBee network start error reported when the network was actually started.
  • Fixed issues with network key comparison.
  • Fixed broken Zigbee button triggers.