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!!! Hardware version change notice (from 08.01.2026)
As of August 1, 2026, the A1-SLWF-09 device has been updated to a new hardware version (A1-SLWF-09U). Key changes:
Microcontroller: ESP32-S3 (previously ESP32-D0WD-V3)
Ethernet module: W5500 SPI (previously LAN8720 RMII)
The new W5500 Ethernet module is incompatible with the old LAN8720 module. Make sure you order the correct module for your board version. If you're not sure which version you have — check the markings on the board.
All other specifications, dimensions, and firmware compatibility remain unchanged.
Addressable LED Controller · WLED · ESP32-S3 · SMLIGHT
SMLIGHT A1-SLWF‑09U
Modular addressable LED strip controller — ESP32-S3 based, WLED-compatible, expandable
The A1-SLWF‑09U is a next-generation controller from SMLIGHT, built for maximum flexibility and integration with modern smart home systems. Powered by the capable ESP32-S3 with WLED firmware pre-installed, it drives addressable LED strips with extended capabilities and support for modular expansions: Ethernet, PoE, and a digital microphone.
What you can do with A1-SLWF-09U, in short
The base device has the following characteristics:
| Modularity: the user can install Ethernet, PoE, and digital microphone modules. |
| Slim and unobtrusive design. We deliberately left no markings on the top of the enclosure, so the device can be mounted on a white wall without drawing attention. |
| Fast wired connection — one click and your LED strip is connected, no screws. |
| Power from Type-C PD/QC (PD/QC technology only) — the device has a switch between 5V and 12V! Yes, you can power a 12V strip through Type-C (a PD/QC power supply is required). Convenient, isn't it? |
| PoE power. Recommended continuous current: 0.8A. Peak up to 2A. For 5V strips only (WS2812, etc.). |
| Relay: a physical MOSFET relay (GPIO33). A wired terminal can also be used to bypass the relay. |
| Two outputs for addressable LED strips (with signal level boosters). |
| Two device control buttons. |
| DIY screw terminal. |
Key Features
|
Modular support
Optional Ethernet, PoE, and digital microphone modules — install only what you need.
|
ESP32-S3 power
Built on ESP32-S3 with 16 MB of flash memory.
|
WLED ready
Pre-installed WLED firmware for easy setup, vivid effects, and sound-reactive modes.
|
|
Strip compatibility
Supports WS2812B, SK6812, APA102, and other addressable strips (5V–24V).
|
Multi-channel control
Two hardware LED channels (expandable to 6 via GPIO).
|
Smart home integration
Wireless connection to Home Assistant and other systems via Wi‑Fi, or Ethernet with the module.
|
|
Power options
USB-C with PD support, screw terminal (VIN), or optional PoE via module.
|
Sound reactivity
Optional ICS‑43432 I²S MEMS digital microphone via module to sync lighting with music.
|
Reliable connectivity
Optional Ethernet port (W5500 SPI) via module. Compatible only with A1-SLWF-09U.
|
|
Developer-friendly
UART auto-flashing via USB-C, exposed GPIO for expansion, labeled connectors for all modules.
|
Modular Expansions (sold separately)
|
Ethernet module
Adds 10/100 Mbps LAN via W5500 SPI (RJ45). Compatible only with the A1-SLWF-09U (ESP32-S3) version. Incompatible with older LAN8720 boards.
|
PoE module
IEEE 802.3af PoE support, provides 5V 2A power.
|
Microphone module
High-quality ICS-43432 MEMS digital microphone with I²S output for sound-reactive WLED effects.
|
Each module connects to dedicated keyed JST connectors for safety and convenience.
Connectivity & Interfaces
— Wi‑Fi 2.4 GHz (built-in)
— 10/100 Mbps Ethernet via W5500 module
— IR receiver and buttons via DIY screw interface
— USB-C with UART auto-flashing
— GPIO expansion for additional LED outputs, sensors, and DIY projects
Technical Specifications
| Dimensions | 57 × 30 × 23 mm |
| Supply voltage | 5V–24V DC (via VIN or USB-C) |
| LED output power | Powered directly from an external source via a MOSFET switch |
| Enclosure | Open PCB or optional enclosure (coming soon) |
Ideal For
|
DIY LED projects
|
Music-reactive ambient lighting
|
Smart home automation
|
|
Wall panels, signage, and holiday decor
|
Professional installations with Ethernet or PoE
|
Firmware & OTA
|
Default firmware
SMLIGHT WLED fork (pre-installed)
|
Compatible alternatives
ESPHome, Tasmota, custom firmware
|
OTA updates
Supported via the WLED interface
|
!!! Important (A1-SLWF-09U only)
The W5500 Ethernet chip is not supported by the official WLED firmware (github.com/wled/WLED). The A1-SLWF-09U runs on the SMLIGHT WLED fork, which adds W5500 support. Flashing the official WLED release will break Ethernet. Always use SMLIGHT's firmware for this device.
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A1-SLWF-03-Manual-v1.1.pdf 400.93 KB
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