Release notes · Jul 04, 2026 · 1 min read
SLZB-OS v3.3.3.dev7
Developer-channel build: OTA crash-rollback, BLE proxy + Berry module for U-line/Ultima, PSRAM-by-default Berry scripts, RAM optimizations, plus crash-message and Zigbee Hub fixes.
Improvements
- Improved firmware rollback mechanics after an OTA update — the device rolls back to the previous firmware if a crash occurs within 30 seconds of the update.
- Increased TCP keep-alive timeout to prevent socket drops on unstable networks.
- New BLE page and BLE proxy for U-line and Ultima devices.
- New BLE Berry module for U-line devices.
- All Berry scripts on U-line and Ultima devices now use PSRAM by default and no longer crash when accessing the file system.
- RAM optimization for U-line and Ultima devices.
- Improved deinitialization for the "Thread + OTBR running on device" mode.
Fixes
- Fixed an issue where a user could accidentally copy the text of a crash message even if the crash did not occur.
Zigbee Hub
- Fixed JSON validation for the
system_controltopic.