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 (5–24 V)

  • DC plug in (5-24V)
  • Wire terminal (5-24V)

  • PoE module (optional, 5V 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 5 V 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