You can use this SoC as Zigbee Coordinator, Zigbee Router or Open Thread Border Router

High-performance Zigbee coordinator for Home Assistant

Dedicated Thread network for Matter devices

Zigbee router for range extension and mesh stability

You can use this SoC as Zigbee Coordinator, Zigbee Router or Open Thread Border Router

Parallel Zigbee or Thread network

Vendor-specific testing or migration scenarios

Redundant or isolated smart-home environments

Z-Wave 800 add-on allows you to run a full Z-Wave network over Ethernet using Home Assistant Z-Wave JS.

High-performance Z-Wave controller

Different Z-Wave regions are supported

Centralized Z-Wave over Ethernet or USB.

ESP32-S3 Wi-Fi 2.4Ghz provides the primary network backbone for SLZB-Ultima, enabling wireless operation, Ethernet-backed bridging, and internet access for all internal and external radios.

Standalone smart-home gateway over Wi-Fi

Backup or secondary connectivity when Ethernet is unavailable

Internet access for remote or mobile installations

ESP32-S3 Bluetooth enables Bluetooth Proxy functionality when running ESPHome firmware, allowing Home Assistant to discover, connect to, and communicate with BLE devices over the network

Bluetooth Proxy for Home Assistant

Integrate BLE sensors, locks, and trackers

Presence detection and room-based monitoring

The built-in IR receiver allows SLZB-Ultima to capture and expose infrared commands from standard remote controls. Received IR signals can be displayed, logged, and used as triggers for automations in Home Assistant.

Capture and analyze IR commands from TV, AC, or AV remotes

Learn legacy IR protocols for later retransmission

Integrate non-smart IR devices into a modern smart-home setup

The built-in IR transmitter allows SLZB-Ultima to send infrared commands to TVs, air conditioners, and other IR-controlled devices. It can transmit predefined codes, triggered by Home Assistant or other automations logic.

Control TVs, AC units, projectors, and AV equipment

Automate climate or media devices without cloud services

Replace multiple IR remotes with a single smart controller

The optional PoE add-on allows SLZB-Ultima to be powered directly via Power over Ethernet, delivering both power and data over a single cable. This enables cleaner installations and easy integration into professional or rack-mounted

Single-cable power and network connectivity

Centralized power via PoE switches or UPS-backed infrastructure

Professional smart-home and commercial deployments

The optional 4G / LTE add-on turns SLZB-Ultima into a self-contained internet gateway, providing mobile data connectivity without relying on wired or local Wi-Fi networks. It can operate as a primary or backup WAN.

Internet access in remote or hard-to-reach locations

Autonomous smart-home or IoT deployments

Temporary installations, mobile setups, or field testing

The dedicated USB host port allows SLZB-Ultima to connect additional radios and peripherals, extending the device beyond its built-in hardware. This enables support for external Zigbee, Thread, Z-Wave USB adapters, as well as experimental or custom USB devices, depending on firmware and driver support.

Add extra Zigbee, Thread, or Z-Wave radios

Run parallel or isolated networks for testing or migration

Extend functionality without replacing the core device

The built-in buzzer provides audible feedback and notifications directly from the device. It can generate beeps, alerts, and simple melodies triggered by system events, user actions, or automations.

Confirmation, warning, and error sounds

Local status notifications and alerts

Audible signaling in remote installations

The optional microphone add-on provides audio input when running ESPHome-based firmware, enabling audio streaming and processing in Home Assistant (for example, in Voice Assistant) or custom DIY projects.

Audio streaming to Home Assistant via ESPHome

Voice- or sound-triggered DIY automations

Prototyping custom audio-based integrations

SLZB-Ultima features 12 on-board WS2812B RGB LEDs that provide rich, fully addressable visual feedback. The LEDs can display colors, patterns, and animations to reflect system states, network activity, alerts, or custom logic.

Visual indication of system, network, or radio status

Confirmation, warning, and error animations

Custom LED effects for automations and scenes

SLZB-Ultima includes 3 physical buttons and 4 service LEDs for direct, local interaction with the device. They allow users to trigger actions, change modes, initiate pairing, perform resets, and visually monitor system states—without requiring web or network access.

Manual actions and quick local control

Mode switching or reset operations

Visual indication of system and network states

With Dynamic DNS (DDNS) support, SLZB-Ultima remains reachable even when your internet connection uses a changing public IP address. The device automatically updates its address, enabling reliable remote access without manual router reconfiguration.

Remote access to SLZB-Ultima from anywhere

Managing installations behind consumer ISPs

Reliable access without purchasing a static IP

With built-in WireGuard VPN support, SLZB-Ultima can establish secure, encrypted connections to remote Home Assistant or other systems. WireGuard provides modern cryptography, high performance, and low overhead, making it suitable for permanent connections, mobile access, and site-to-site smart-home setups.

Secure remote access without exposing ports

Encrypted connection to Home Assistant or internal services

Safe management of remote or mobile installations

SLZB-Ultima can run a lightweight built-in Zigbee hub, acting as a micro alternative to Zigbee2MQTT or ZHA for small, local setups - without Home Assistant or external services. It allows you to pair, monitor, and control Zigbee devices directly on the SLZB-Ultima.

Small Zigbee networks without ZHA or Zigbee2MQTT

Simple lighting, switching, or sensor monitoring

Remote or offline installations with minimal infrastructure

SLZB-Ultima can execute local automations directly on the device, allowing logic and actions to run independently of the internet or external controllers. This ensures low latency, high reliability, and continued operation even when Home Assistant or network connectivity is unavailable.

Turn on a light when a door Zigbee sensor is triggered

Reboot the device on socket failure

Parse online data and trigger GPIO or outputs

SLZB-Ultima supports over-the-air (OTA) firmware updates, allowing both core and radio firmware to be updated remotely through a simple, controlled update process - no physical access required.

Update devices deployed in remote locations

Roll out fixes and improvements safely

Maintain and manage multiple devices at scale