PART · SLZB-U2LUSB-to-Ethernet bridge · SLZB-OS · SMLIGHTr1.03 · 2026·08
New product · USB-to-Ethernet bridge
SLZB-U2L.
Finally in range.
The USB stick that runs your Zigbee or Z-Wave devices normally has to sit next to your computer — often in the worst spot of the house. The SLZB-U2L sets it free: plug the stick in, connect the box to your home network, and put it wherever the signal is best. Everything keeps working as before. Just better.
01 · Gallery
See it up close.
02
How it works. In plain words.
STEP 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 — you choose the active one on the box's web page.
STEP 2
Connect the box to your home network
Join your Wi-Fi, or run a regular network cable to your router — whichever you prefer. That's the whole installation.
STEP 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.
If you can plug in a USB stick and join a Wi-Fi network, you can set this up. Guided setup runs in the browser — no apps, no accounts, no cloud.
03
Sounds familiar? It's for you.
“The signal doesn't reach upstairs”
Move the stick, not the computer
Your computer can stay in the basement or the closet. The box carries your stick to the middle of the house — and suddenly every room is in range.
“I have two kinds of devices”
One box, both kinds of sticks
Zigbee lights and Z-Wave locks? Plug both sticks into the same box and switch the active one on its web page — no extra hardware, no second setup. If both sticks are CP2102-based, they can even run at the same time.
“I want less cable clutter”
One small box, one wire
No more USB extension cords snaking across the floor. On Wi-Fi the box needs only a power cable — and there's even an option that runs on a single network cable, power included.
“I have a summer house”
Check in from anywhere
Set a box up at the cottage and it appears on your home network — over a secure, encrypted connection that's built in. A mobile-internet add-on is in the works for places with no internet line at all.
“I don't want a cloud”
Private, like all our gear
Everything stays inside your home network. No account, no subscription, no company server sitting between you and your light switch.
“I'm the technical type”
There's a datasheet below
Open firmware, a printable enclosure, and support for a long list of hobby radios. Skip to the technical half →
04
Quick questions.
Q-01
Do I need a network cable?
No — Wi-Fi alone works fine. The cable is there for people who prefer a wired connection.
Q-02
Will it work with my smart-home system?
If your smart home runs on a computer in your house — Home Assistant and all the popular companions — then yes.
Q-03
Which USB sticks fit?
All SMLIGHT sticks and nearly every common Zigbee or Z-Wave stick from recent years. The exact compatibility list is in the technical section below.
Q-04
What if I get stuck?
Setup is guided, step by step, in your web browser. And if anything is unclear, the manual and our support team are one click away.
05
For the tech-savvy.
Everything from here down is the datasheet — for readers who enjoy that sort of thing. You don't need any of it to set up or use the SLZB-U2L.
USB
- 3 × USB-A host
- 1 × USB-C host
- 1 × USB-C device
- 1 active passthrough device
- 2 simultaneous · CP2102-based
Network
- Ethernet 10/100 · RJ45
- Wi-Fi 2.4 GHz
- PoE · optional module
- Ethernet-to-Wi-Fi bridge
- 4G/LTE module · in development
Firmware
- SLZB-OS · pre-flashed
- WireGuard VPN · DDNS
- OTA updates
- LED control · incl. RJ45 LEDs
- ESPHome supported
Radios it carries
- Zigbee · Thread (SLZB-07 series)
- Z-Wave · Long Range sticks
- LoRa · 433 MHz receivers
- CH34x · CP210x · CDC-ACM …
- Multilanguage web UI
06
Open what interests you.
How the signal travelsOne picture: your sticks → the box → your network → your smart home.Fig. 1
USB radios plug into the bridge → SLZB-U2L exposes them over Ethernet, Wi-Fi or PoE → Home Assistant, Zigbee2MQTT, Z-Wave JS or any server sees them as if they were local. Optional 4G/LTE uplink is in development.
Ways to connect itWi-Fi, network cable, single-cable power, or straight into a computer — compared.Tab. 1
| Mode | Link | Power | Notes |
|---|---|---|---|
| Wi-Fi | 2.4 GHz | USB-C | Fully wireless — no Ethernet addon needed |
| Ethernet | RJ45 · 10/100 | USB-C | Wired stability |
| PoE | RJ45 · 10/100 | Over the same cable | Optional add-on module — one cable for all |
| USB aggregation | USB-C device port | Host-powered | Two CP2102-based dongles through one physical USB port |
Compatible sticks & chipsExactly which USB devices we've tested and verified.Tab. 2
| Category | Verified devices | Notes |
|---|---|---|
| Zigbee / Thread | SLZB-07 · SLZB-07p7 · SLZB-07p10 · SLZB-07Mg24 | SLZB-07 series → |
| Z-Wave / Long Range | Popular Z-Wave USB controllers | Z-Wave JS over the network |
| Other radios | Any dongle on a supported chipset | CH34X · CH340 · ESP_JTAG · STM32_VCP · CDC_ACM · CP210X |
Software featuresWhat the built-in SLZB-OS can do — and how ESPHome compares.Tab. 3
| Feature | SLZB-OS (default) | ESPHome |
|---|---|---|
| USB passthrough over network | ● | ● |
| WireGuard VPN | ● | — |
| DDNS service | ● | — |
| OTA updates | ● | ● |
| LED control (incl. RJ45 port LEDs) | ● | — |
| Ethernet-to-Wi-Fi bridge | ● | — |
| Multilanguage web UI | ● | — |
| USB UART passthrough for dongles | ● | ● |
| Bluetooth Proxy | — | ● |
Full specificationsEvery number we can publish, in one table.Tab. 4
TABLE 4. Technical specifications — r1.032026·08
| Parameter | Value | Notes |
|---|---|---|
| USB ports | 3 × USB-A host · 1 × USB-C host · 1 × USB-C device | Device port = aggregation output |
| Passthrough chipsets | CH34X · CH340 · ESP_JTAG · STM32_VCP · CDC_ACM · CP210X | Covers nearly every hobbyist dongle |
| Networking | Wi-Fi 2.4 GHz · Ethernet 10/100 · PoE optional | PoE via add-on module |
| USB passthrough | 1 active device · 2 simultaneous on CP2102 | Active device selected in the web UI |
| Firmware | SLZB-OS (default) · ESPHome supported | OTA on both |
| System features | WireGuard · OTA · DDNS · LED control · multilanguage | SLZB-OS |
| Power | USB-C · Ethernet (PoE option) | — |
| Modules | PoE (optional) · LTE (optional, in development) | — |
| Size | PCB ~131 × 49 mm | Enclosure dimensions TBD |
07
Downloads & pairings.
Downloads
- User manual
- Software updater · runs in the browser
08
Where to get it.
The SLZB-U2L is shipping now from the two stores below — both deliver worldwide. It reaches the wider distributor network shortly. Want the version powered through the network cable, or ordering for a business? Our sales team is one email away.
Please read before ordering
N-01
Ethernet, PoE and 4G are optional modules
The base unit connects over Wi-Fi and USB. If you want the wired network port, PoE power or the 4G/LTE uplink (in development), choose the variant that includes that module.
N-02
One USB device is active at a time
You can plug in several sticks, but the bridge passes one of them through to your server at a time — you pick the active device in the web interface. Two dongles can run simultaneously only when both are CP2102-based; support for more combinations is expanding through firmware updates.
N-03
4G and USB share one channel
The optional 4G/LTE module works in USB-modem mode on the same USB channel. It can be installed alongside a USB stick, but only one of the two is active at a time — you choose which in the web interface.
SLZB-U2L · Datasheet r1.03 · 2026·08smlight.tech/products/slzb-u2l · SMLIGHT