SMLIGHT USB-LAN Adapter SLZB-U2L

SMLIGHT USB-to-LAN Adapter SLZB-U2L

SMLIGHT's SLZB-U2L is a compact USB-to-network gateway that makes your USB smart-home radio adapter reachable by any server on your LAN. It does so wirelessly over 2.4 GHz Wi-Fi, but it can also be wired over Ethernet (with the use of this add-on). This lets you place the radio where it performs best, without having to move the server that controls it.

Key Features

All Your Dongles in One Place

Connect several USB sticks, but only one passes through to your server at a time, and you choose which one in the web interface. Two CP2102-based dongles can run simultaneously, with more combinations coming in firmware updates.

2.4 GHz Wi-Fi

Built-in, for a fully wireless install straight out of the box.

Optional Add-on Modules

• Ethernet (W5500): Adds a wired 10/100 RJ45 network port for a stable, interference-free connection.
• PoE: Power and network over a single Ethernet cable; perfect for ceiling or wall installs with no power socket nearby.
  
• 4G / LTE: A mobile-internet uplink for sites with no wired or Wi-Fi internet. It works great when paired with WireGuard for remote deployments.
  

WireGuard VPN

A fast, encrypted tunnel to reach the bridge and its radio securely from anywhere, or to place a bridge at a remote location.

DDNS

A built-in dynamic DNS keeps the device reachable even when your ISP changes your IP address.

Scripts & Automations

Run logic directly on the device, such as scheduling tasks, reacting to events, and automating housekeeping.

OTA Updates

Perform one-click over-the-air updates on both SLZB-OS and ESPHome.

ESPHome Supported

If you prefer open source end-to-end, then you can flash ESPHome for USB host, USB-UART passthrough, and Bluetooth Proxy.

Compatibility

Specifications

• USB: 3 x USB-A host | 1 x USB-C host | 1 x USB-C device
• Passthrough Chipsets: CH34X | CH340 | ESP_JTAG | STM32_VCP | CDC_ACM | CP210X
• Networking: Wi-Fi 2.4 GHz | Ethernet 10/100 (RJ45) via add-on | PoE via add-on
• USB Passthrough: 1 active device | 2 simultaneously on CP2102
• Firmware: SLZB-OS (default) | ESPHome supported
  
• System Features: WireGuard | OTA updates | DDNS | LED control | multilanguage
  
• Works With: Home Assistant | Zigbee2MQTT | Z-Wave JS | ESPHome | Any networked-serial-port server
• Power: USB-C | Ethernet (PoE add-on)
• Add-ons: Ethernet (W5500) | PoE | 4G / LTE

How it Works

1. Plug your stick into the box. The USB stick that runs your smart lights, plugs and sensors goes straight into the box. There's room for a spare stick too. Just choose which stick is the active one on the box's web page.
2. Connect the box to your home network. Join your Wi-Fi, or run a regular network cable to your router using the Ethernet add-on, whichever you prefer. That's the whole installation.
3. Everything works like before, only better. Your smart-home system finds the stick over the network and carries on as usual. The box can sit anywhere in the house, so put it where the signal is best.

Notes

• Ethernet, PoE, and 4G are optional modules. The base unit only connects over Wi-Fi and USB.
• Only one USB device works at a time, two if both dongles use CP2102 chipset. You can connect several USB dongles at once, but only one is passed through to your server at a time; you have to select the active device in the web interface. Two dongles can work simultaneously only when both are based on the CP2102 chip. Support for more combinations is being expanded through firmware updates.
  
• The optional 4G/LTE module works in USB-modem mode and shares the USB channel. It can be installed together with a USB stick, but only one of the two can work at a time. You choose which in the web interface.

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