Bluetooth Low Energy
Please note!
To use this functionality, you need to update your Home Assistant to 2026.8 or higher and update SLZB-OS to v3.3.3.dev7 or higher.
General information
SLZB-OS supports receiving BLE advertisements for U series and Ultima devices (ESP32-S3 devices).
Active BLE connections are not supported.
Only support passive/active scanning.
The system consists of two parts:
- SLZB-OS with "Proxy advertisements" enabled. Responsible for physically receiving BLE packets and sending them to HA.
- SMLIGHT SLZB Home Assistant integration. Manages scanning on the SLZB-OS side, receives raw BLE and forwards them to the HA core.

BLE proxy
BLE proxy uses port 5050 so please make sure it is not blocked on your network!
SLZB-OS supports proxying BLE packets to Home Assistant using optimized UDP protocol.
To use BLE proxy you need:
- Have SLZB-OS v3.3.3.dev7 or later
- Have Home Assistant 2026.8 or later
- Have active SMLIGHT SLZB integration
- Have "BLE" and "Proxy advertisements" enabled in SLZB-OS
