§ Series · USB single-radio · Zigbee + Thread

SLZB-07.
Zigbee in a USB stick.

Name: SLZB-07
Brand: SMLIGHT

Plug-and-play USB Zigbee coordinator. Five radio SoCs across Silicon Labs and Texas Instruments. CP2102N USB-to-UART bridge, +20 dB radio amp, rotatable +3 dB antenna. 18 × 54 × 10 mm — the smallest USB Zigbee stick with an external antenna.

Current model

SLZB-07

Radio SoC

EFR32MG21

Availability

In stock — ships in 48h

Where to buy Compare all five →

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18 × 54 × 10 mm · 14 gMADE · UKRAINE

§ SELECT MODELEverything identical except the radio SoC

§ 01 / Why SLZB-07

Five variants. One USB stick.

Same body.
Same firmware. Radio changes.

The tiny one

18 × 54 × 10 mm. The smallest USB Zigbee stick with an external antenna. Slots into adjacent ports without blocking them.

Pre-flashed, plug-and-play

Works with Home Assistant ZHA and Zigbee2MQTT out of the box. No cables, no toolchain, no flashing. Connect USB → done.

+20 dB amp · +3 dB antenna

On-board +20 dB amplifier and a 3-axis rotatable +3 dB external antenna. Covers the farthest corners without an extension cable.

§ 02 / Chipsets

The only thing that changes between variants.

Radio SoC.
Everything else is shared.

RADIO SOC

EFR32MG21

Silicon Labs

Zigbee / Thread

ANTENNA · +3 dB · rotatable

SERIAL BRIDGE

CP2102N

Silicon Labs · USB / UART

Best-in-class throughput · supports EFR32 autoflash

SHARED ACROSS ALL 07 VARIANTS

Radio SoC

Vendor

Capabilities

Year

Current pick?

EFR32MG21

Silicon Labs

Zigbee 3.0 · Thread · proven baseline

2019

● IN SLZB-07

EFR32MG24

Silicon Labs

Zigbee 3.0 · Thread 1.3 · AI/ML accelerator

2022

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EFR32MG26

Silicon Labs

Zigbee 3.0 · Thread 1.4 · 2× RAM vs MG24

2025

—

CC2652P7

Zigbee 3.0 · Thread 1.3 · +20 dBm · extended

2023

—

CC2674P10

Zigbee 3.0 · Thread 1.3 · +20 dBm · extra RAM

2024

—

Shared across every variant

CP2102N

USB ↔ UART bridge

Silicon Labs' best-in-class USB-to-serial converter. Hardware flow control. Supports EFR32 autoflash — flashing over USB with no extra cables.

+20 dB amp

On-board RF

Integrated radio amplifier. Combined with the external +3 dB antenna, reaches the farthest corners without extension cables.

4-layer PCB

RF isolation

Four-layer board isolates the radio from USB and host miniPC interference. The reason SLZB-07 holds link in cramped server racks.

§ 03 / Functions

What this stick actually does.

12 capabilities
organized by layer

CORE

Zigbee 3.0 coordinator

Works with Zigbee2MQTT and ZHA out of the box. Pre-flashed. Multi-coordinator setups supported.

CORE

Thread / Matter ready

MultiPAN firmware available. Switch to Thread/Matter on the same hardware.

CORE

DIY pinouts

Pinouts exposed for the radio SoC — for DIY flashing, debugging, and custom firmware.

I/O

USB-A plug

Plugs directly into any USB-A port. Tested with server racks, miniPCs, Synology NAS, Raspberry Pi.

I/O

No extension cable needed

Board layout cancels host-side USB interference — extension cables are optional, not required.

I/O

Rotatable +3 dB antenna

3-axis-rotatable external antenna. Point it where coverage is weakest.

FIRMWARE

Pre-flashed

Ships ready. Plug and play with ZHA / Zigbee2MQTT. No tools required.

FIRMWARE

Remote firmware update

Update the radio firmware remotely — just need access to the host server. Ideal for rare-visited installations.

FIRMWARE

EFR32 autoflash

Native autoflash mode on Silabs variants — flashing over USB with no toolchain.

FIRMWARE

Community firmwares

Supports all major community Zigbee firmwares — Z2M coordinator, Thread/Matter, multi-PAN.

HARDWARE

CP2102N serial bridge

Silicon Labs USB ↔ UART with hardware flow control. No compromise on speed or reliability.

HARDWARE

Made in Ukraine

Designed, developed, and tested in Ukraine. Ukrainian quality guaranteed.

§ 04 / Why SLZB-07

vs. other USB Zigbee sticks.

8 engineering choices
that set 07 apart

Engineering choice

SLZB-07

Other A

Other B

Based on fast CP2102N USB/UART SoC

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External antenna for better coverage

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Small & tiny — won't block adjacent USB ports

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Hardware flow control supported

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4-layer PCB — RF isolated from USB & miniPC

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Radio SoC integrated on a single board (not modular)

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EFR32 autoflash for flashing over USB

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Pairs with SLZB-06 Ethernet adapter for multi-site setups

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§ 05 / Compare

Five variants. Side by side.

Click a column
to switch variant

Radio SoC

EFR32MG21

EFR32MG24

EFR32MG26

CC2652P7

CC2674P10

Radio vendor

Silicon Labs

Texas Instruments

Positioning

MAINSTREAM

MG24

PREMIUM

TI EXTENDED

TI RECOMMENDED

Availability

In stock — ships in 48h

In stock

Pre-order — ships Apr 2026

In stock

Everything else

CP2102N USB/UART · +20 dB radio amp · +3 dB rotatable antenna · 4-layer PCB · EFR32 autoflash · DIY pinouts · USB-A plug · 18 × 54 × 10 mm · +5 to +35 °C

Not sure which to pick?

Default mainstream pick — the original SLZB-07

Silabs with on-chip AI/ML accelerator

Top-shelf Silabs, future-proof for years

Extended TI range with Thread 1.3

Latest TI chip, maximum headroom

§ 06 / In the box

What you actually unbox.

Small box.
Small device. Small footprint.

SLZB-07 USB stick

18 × 54 × 10 mm

External antenna

+3 dB · rotatable · 3-axis

QR-code manual card

Scan for the complete online manual.

§ 07 / Full specifications

Every number. Every port.

Same body.
Radio changes per variant.

Main Zigbee 3.0 chip

EFR32MG21 (Silicon Labs)

Serial chip

CP2102N (Silicon Labs)

Radio SoC output gain

+20 dB

External antenna

+3 dB, rotatable (3-axis)

PCB

4-layer, RF-isolated

Autoflash mode

Yes (EFR32 variants)

§ 08 / Useful resources

Manuals. Guides. Reviews.

10 resources
cross-applicable to all 07 variants

§ 09 / FAQ

12 questions. Straight answers.

From SMLIGHT docs
+ community forums

Yes. Plug it into the USB port of your server and start ZHA in Home Assistant, or Zigbee2MQTT. It ships pre-flashed and is auto-detected by Home Assistant.

§ 13 / Video reviews

Independent reviewers. Actual installs.

12 videos
Page 1/4 · auto-rotate

14:22

SLZB-MR1U Review — the new mainstream Zigbee coordinator

Digiblur·38k subs

89k views·Mar 2026

22:08

I replaced 3 Zigbee dongles with one SLZB-MR3U — here's what happened

SmartHomeScene·72k subs

156k views·Feb 2026

31:47

Multi-radio deep dive: MR1U vs MR3U vs MR5U side-by-side

ModernHouse·24k subs

62k views·Apr 2026

Refreshes every 8s · See all on YouTube →

§ 14 / Owner feedback

12 owners. In their own words.

Rotating
every 9s

🇺🇸MR1U★★★★★

Swapped from a CC2652P dongle to the MR1U for the Ethernet + PoE combo. Put it in the basement wiring closet where my mesh was weakest — and suddenly the whole top floor came alive again.

u/basement_rack_robr/homeassistant·Apr 2026

🇺🇸MR3U★★★★★

Running MR3U as a dedicated Matter-over-Thread border router alongside my existing Zigbee coordinator. The dual-radio split lets me keep both networks on their optimal channels. Setup took 10 minutes.

matter_mesh_miker/MatterProtocol·Mar 2026

🇩🇪MR5U★★★★★

MR5U with twin MG24s is a dream for my standardization — one toolchain, one set of firmware builds, one debugging workflow. Silicon Labs only. Beautiful.

@embedded_ericSMLIGHT #developers·Feb 2026

12 quotes · Submit yours →

§ 15 / Useful links