Hardware Overview

The SMLIGHT SLWF-09 is designed as a modular, ESP32-based LED controller with optional add-on boards for Ethernet, Power over Ethernet (PoE), and digital microphone functionality. This section describes the main components and interfaces of the SLWF-09 and its supported add-ons. 

 

 2.1 Main Board Features 

 

 

 ESP32-D0WD-V3 microcontroller with 16 MB flash memory 

 

 

 Pre-installed WLED firmware for plug-and-play operation 

 

 

 Two LED control channels by default (expandable to six via GPIO) 

 

 

 USB-C port with UART auto-flash for firmware updates 

 

 

 Power input options : 

 

 

 USB-C (supports PD negotiation - can drive either 5V ortr 12V LED strips) 

 

 

 VIN screw terminal (5–12V) 

 

 DC plug in (5-12V) 

 Wire terminal (5-12V) 

 

 PoE module (optional, 5V 800mA output) 

 

 

 

 

 Two on-board buttons for mode selection and reset 

 

 

 Expansion headers for add-on modules (Ethernet, PoE, Microphone, future expansions) 

 

 

 Level-shifted LED outputs for wide LED voltage compatibility (level shifting 5V) 

 

 DIY Terminal - for external buttons sensors or relays. 

 

 

 2.2 Add-on Modules 

 2.2.1 Ethernet Module (Optional) 

 

 

 Based on LAN8720 Ethernet PHY 

 

 

 Standard RJ45 connector with integrated magnetics and status LEDs 

 

 

 10/100 Mbps full-duplex operation 

 

 

 Connects directly to the SLWF-09 via dedicated header 

 

 

 Can be used standalone or with the PoE module 

 

 

 Benefits: 

 

 

 Reliable, low-latency connection for installations where Wi-Fi is unstable or not preferred 

 

 

 Full Home Assistant and WLED Ethernet support 

 

 

 

 2.2.2 PoE Module (Optional) 

 

 

 IEEE 802.3af compliant (PoE Class 0) 

 

 

 Integrated DC/DC converter provides regulated 5V (up to 800mA) power to the SLWF-09 

 

 

 Connects between Ethernet add-on and network cable 

 

 

 Eliminates the need for a separate power adapter 

 

 

 Benefits: 

 

 

 Single-cable solution for both data and power 

 

 

 Ideal for ceiling, wall, or inaccessible installations 

 

 

 

 2.2.3 Microphone Module (Optional) 

 

 

 ICS-43432 digital MEMS microphone 

 

 

 Connects via dedicated header to ESP32 I²S pins 

 

 

 Used by WLED to enable sound-reactive LED effects 

 

 

 No additional power supply required (powered from main board) 

 

 

 Benefits: 

 

 

 Real-time music synchronization without external sound sensors 

 

 

 High-quality digital audio sampling 

 

 

 

 2.3 Physical Dimensions 

 

 

 Main Board: approx. 57 × 30 × 23 mm 

 

 

 Ethernet Module: approx. 60 × 18 × 15 mm 

 

 

 PoE Module: approx. 31.5 × 28.7 × 16 mm 

 

 

 Microphone Module: approx. 15 × 12 mm 

 

 

 

 2.4 Connectivity Summary 

 

 

 

 

 

 Interface 

 Description 

 

 

 

 

 USB-C 

 

 Power input (5V or 12V - based on switch selector) and UART programming 

 

 

 

 VIN 

 Screw terminal power input (5–12V) 

 

 

 LED OUT 1/2 

 Two independent addressable LED channels 

 

 

 Add-on Ports 

 Headers for Ethernet, PoE, and Microphone modules 

 

 

 Buttons 

 Boot/flash and reset/mode selection