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Changelog SLZB-OS

🚀 SLZB-OS v3.2.4 - Release Notes

The latest version of SLZB-OS (v3.2.4) brings improvements to MQTT integration, internal scripting (automations), Zigbee diagnostics, and overall system stability.

✨ New Features & Enhancements

  • ✅ Added MQTT module support for scripts, so internal automations can send/receive MQTT messages - View usage examples
  • ✅ Introduced MQTT API support for SLZB-Ultima - control IR receiver, Transmitter, Buzzer, WS2812 via MQTT (alongside with HTTP control method) - Read MQTT API docs
  • ✅ MQTT can now be activated independently of Zigbee Hub
  • ✅ Pinned socket tasks to dedicated core for improved performance
  • ✅ Zigbee channel scanning added for MR devices (on Z2M/ZHA page)
  • ✅ Display of USB mode added for non-U series devices
  • ✅ IEEE-related controls disabled for Thread or Zigbee Router firmware
  • ✅ Added SSE module for internal scripting

🐞 Fixes & Improvements

  • 🐞 Fixed possible web server overflows during reboot waits
  • 🐞 Fixed MQTT discovery crashes in Zigbee Hub mode
  • 🐞 Optimized overall web server performance
  • 🐞 Fixed incorrect baudrate info for radio3 on Ultima
  • 🐞 Fixed syslog-related crashes
  • 🐞 Hidden socket statuses for USB mode on U devices
  • 🐞 Fixed incorrect display of Z-W addon info on Ultima
  • 🐞 Tuned serial settings for improved communication
  • 🐞 Fixed router reconnect issue on MR4
  • 🐞 Fixed incorrect baudrate / crash during .gbl metadata parsing
  • 🐞 Fixed radio module OTA updates in USB mode (U series)
  • 🐞 Fixed IEEE read issue for MR1U
  • 🐞 Fixed bs-target display issue in addons accordion
  • 🐞 Fixed socket time/status reporting

 

🚀 SLZB-OS v3.2.0 - Release Notes

We’re happy to announce the release of SLZB-OS v3.2.0 - a stability-focused update with new device support, major improvements for U-series USB functionality, and multiple Zigbee Hub reliability enhancements.

✨ Highlights

  • ✅ FULL support of SLZB-Ultima added - SLZB‑Ultima
  • ✅ Improved USB capabilities for U series (new alternative driver)
  • ✅ Better stability during OTA updates and Zigbee Hub operation
  • ✅ Updated dashboard layout

🆕 New Features

  • ✅ Added Full support for the new SLZB-Ultima device - Learn more
  • ✅ New alternative USB driver can be selected on the "USB" page (U series)
    • Provides advanced USB capabilities
  • ✅ USB passthrough now supports 1200 baud

📡 Zigbee Hub Improvements

  • ✅ Zigbee Hub now includes a Reset option if startup fails
  • ✅ Zigbee Hub now stops automatically when an OTA update is in progress
  • ✅ Added missing Zigbee Hub device configurations after reboot
  • ✅ Added Zigbee Hub reset option for recovery when startup fails
  • ✅ Fixed a Zigbee Hub crash that could occur in some situations on the U series

🔌 USB & Passthrough

  • ✅ Added selectable new alternative USB driver on the USB settings page (U series)
  • ✅ USB passthrough now supports 1200 baud
  • ✅ Zigbee OTA now working in USB mode on U series devices

🌐 Wi‑Fi & Network

  • ✅ Wi‑Fi connection now checks hidden SSIDs when connecting
  • ✅ Fixed rare crash when using Wi‑Fi in some cases

⚙️ OTA & System Stability

  • ✅ Reboot confirmation modal is now shown only when reboot is actually required
  • ✅ Dashboard layout updated for improved usability
  • ✅ Fixed WDT (watchdog timer) triggering during OTA updates in some cases

🛠️ Other Fixes and Improvements

  • ✅ Fixed Berry VM manager free logic
  • ✅ Fixed language cache issues
  • ✅ Fixed MR3U EFR32 bootloader issues
  • ✅ Fixed wrong IEEE writes after reboot for CC radio modules
  • ✅ SLZB‑06Mg26U now uses a separate Zigbee OTA firmware

 

SLZB-OS v3.0.9

We’re excited to release SLZB-OS v3.0.9, bringing major improvements to Zigbee Hub, Thread, and network stability, along with performance boosts, script engine fixes, and a few critical updates.

⚠️ BREAKING CHANGES - ONLY FOR ZIGBEE HUB MODE USERS - NO EFFECT ON ZIGBEE2MQTT OR ZHA USERS!!!

If you use device as Zigbee coordinator (with Zigbee2MQTT or ZHA) / Thread router - it does not affect you. Again, this change is only for those who use device in a Zigbee Hub Mode.

  • ❗ Zigbee Hub Users: All Zigbee devices must be re-paired after this update due to core changes in the Zigbee stack and API.
  • ❗ MQTT Broker Format Changed:
    • Old format: 'mqtt://example.com'
    • New format: 'example.com' (or, IP format: '127.0.0.1')

    You can now use DNS and DDNS hostnames for your MQTT broker.

  • 📘 Updated MQTT API for Zigbee Hub: View the new MQTT API documentation

📡 Zigbee Hub Improvements

  • ✅ Redesigned Zigbee Hub network startup - now significantly faster
  • ✅ Hub now responds to Time attribute and Identify queries
  • 🐞 Fixed: Some Zigbee devices not sending reports in Hub mode
  • 🐞 Fixed: Zigbee Hub mistakenly available for EFR32 on MRx devices

🌐 MQTT & DDNS Enhancements

  • ✅ MQTT Broker now accepts plain domain names, not only IP addresses
  • ✅ "IP Provider" setting for DDNS is now optional
  • 🐞 Fixed DDNS update interval and max value behavior
  • 🐞 Fixed excessive DNS requests from NTP client

⚡ Performance & System Stability

  • 🔧 Increased socket task priority for better responsiveness
  • 🔧 Moved secondary tasks on U series to PSRAM for improved memory usage
  • 🔧 Improved Thread stability for U series devices
  • 🔧 Enhanced EFR32x bootloader activation routine
  • 🔧 Improved USB power switch logic on U series
  • 🐞 Fixed second radio status display in web interface header

🧩 Berry Script Engine (zHub)

  • 🛠 Improved support for sendTuyaData()
  • 🛠 Fixed readAttr() not returning correct values

🌍 Localization

  • 📘 Updated and improved UI translations across supported languages

💡 How to Update SLZB‑OS

You can update your coordinator using one of the following methods:

  • 🔄 OTA Update (Recommended):
    Open the SLZB Web UI → Settings and Tools → Firmware updates → Check for updates (SLZB-OS)
  • 🔌 USB Update (Manual Flash):
    Go to smlight.tech/flasher, select your model, and follow the flashing instructions.
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