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Changelog SLZB-OS

📦 SLZB-OS 3.2.7 - Release Notes

Highlights

  • Integrated 30+ services for local automatiations, including WLED, Telegram, Weather, Slack, Wake-on-Lan, MS Teams, E-mail, OpenWRT, and more.
  • AI is here: Added AI Assistant to help users write automation scripts more easily. in Beta test. Requires AI credentials (so far - Anthropic only). Watch the quick 4-minute YouTube overview .
  • SLZB-xU devices can now try a new experimental mode with native OTBR app running directly on the SLZB-xU device. Mode is still experimental, and there is reported bug in some installations - the coordinator may become unavailable after some time. Pattern is unknown, that is why still experimental status.

Improvements

  • Moved Ethernet processing to Core 0 for better load balancing.
  • Optimized the scripts virtual machine for better performance.
  • For U devices, the BT Proxy option now links directly to the activation manual.
  • IPv6 has been temporarily disabled for rework.
  • All localizations except EN have been moved to a cloud server to reduce firmware size. On first opening the coordinator interface, the localization will load in the browser if internet access is available. Without internet access, EN will be used.

Fixes

  • Fixed metadata overflow crashes for older .gbl update files.
  • MRW10/10U now use the Z-Wave packet parser, improving socket stability.
  • Fixed a crash in the hard reset handler.

Zigbee Hub

  • Replaced the LQI unit with "none".
  • Fixed logging of values for Tuya DP.
  • MQTT now sends correct values even for unsupported devices, allowing them to be used in automations.
  • Added support for new Zigbee devices.

 

📦 SLZB-OS 3.2.6.dev3 - Release Notes (dev)

🛠️ Improvements

  • SLZB-MRW10 and MRW10U: rewritten socket handling for ZWave to improve stability
  • Add Window Covering cluster (0x0102) support to Zigbee Hub mode
  • Add Occupancy Sensing cluster (0x0406) support to Zigbee Hub mode
  • Added speed 2400 for USB page
  • Updated localizations
  • Updated datapoint /ha_sensors
  • Added presets for the SLZB-Ultima3 buzzer

🐛 Fixes

  • ✅ Fixed logging and sending Tuya DP data for Zigbee Hub mode
  • ✅ Fixed running multiple berry scripts
  • ✅ Fixed Wireguard (which was broken in a previous build)

📦 SLZB-OS 3.2.6.dev2 - Release Notes (dev)

✨ Thread + OTBR running on the device - update

Many users have asked for the ability to set TLVs for this mode via SLZB-OS and now you can do this on /otbr page!

🛠️ Improvements

🐛 Fixes

  • ✅ Fixed Zigbee automatic update ignores speed change in new firmware
  • ✅ Fixed a crash in Berry error handler

📦 SLZB-OS 3.2.6.dev0 - Release Notes (dev)

✨ New: Thread + OTBR running on the device (SLZB-xU only) - evaluation/beta mode.

You can now run OpenThread Border Router (OTBR) directly on the SLZB device, instead of running the OTBR add-on/app in Home Assistant.

✅ Why this could be a no-brainer:

  • Home Assistant connects to OTBR via network REST API, so you no longer rely on the Serial-over-IP link used in “Thread to external OTBR” mode.
  • This aims to improve reliability of Thread connectivity between Home Assistant and SLZB devices fpr those, who experiences issues with connectivity.

🏠 Home Assistant setup:

  • OTBR REST API is available at http://device-ip:8080

⚠️ Important notes / limitations:

  • 🧪 Initial (beta) integration — may have limitations or unexpected behavior.
  • 🌐 IPv6 is required and will be force-enabled when this mode is activated.
  • 🧠 "Thread + OTBR running on the device" mode can't work with "router (standard)" mode for Ethernet ↔ WiFi bridge and Zigbee Hub mode. To activate back these features, device mode should be othar than "Thread + OTBR running on the device".
  • "Transparent" mode for WiFi ↔ Ethernet bridge is incompatible with "Thread + OTBR running on the device". If you need "Transparent" mode for WiFi ↔ Ethernet bridge - please use any of the previous versions of the SLZB-OS.
  • 🔒 Availability: only on SLZB-xU series.
  • 🔁 Alternative: you can still use Thread + remote OTBR mode (USB/Ethernet) if you prefer OTBR running elsewhere.

🛠️ Improvements

  • ⏱️ Added uptime info for Socket2 and Socket3 in /ha_sensors

🐛 Fixes

  • ✅ Fixed a crash in Zigbee Hub mode when a received value is larger than expected

🚀 SLZB-OS v3.2.5.dev1 - Release Notes

✨ New Features & Enhancements

  • ✅ Zigbee Hub mode: support for Tuya datapoint data writes.
    !BREACKING CHANGE! Changed the format of the write topic Zigbee Hub for Tuya Zigbee Hub MQTT API
  • ✅ Zigbee Hub mode: Added support for MOES Star Feather (2-key models)
  • ✅ Berry: New BUZZER module for Ultima3 documentation
  • ✅ Berry: New BUTTON module documentation
  • ✅ Increased the web server authentication password limit length from 63 to 64 characters

🐞 Fixes & Improvements

  • 🐞 Fixed corrupted date/time in time settings
  • 🐞 Fixed script list reload on error
  • 🐞 Fixed crash when parsing metadata in .gbl files
  • 🐞 Fixed random ISR crash on startup
  • 🐞 Fixed wrong baudrate for CC26XX radio after factory IEEE read
  • 🐞 fixed EFR32 custom firmware flashing issues
  • 🐞 Fixed LTE addon start on Ultima3
  • 🐞 Fixed Blue LED logic on Ultima3
  • 🐞 Fixed AP delay if SSID and password are empty
  • 🐞 Fixed memory leak in usb_list API
  • 🐞 Fixed web server lockup when option "Disable web server when socket is connected" is active

🚀 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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