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Frequently Asked Questions (FAQ)

Q1: What is the difference between SLWF-09 and SLWF-03?

A: The SLWF-09 is modular — you can add or remove Ethernet, PoE, and Microphone modules. The SLWF-03 has these features built in and is not designed for add-on modules.

Q2: Can I use the SLWF-09 without any add-on modules?

A: Yes. The controller works fully via Wi-Fi without any add-ons. Modules are optional and can be installed later.

Q3: Which LED strips are supported?

A: Most 3-wire (Data, V+, GND) and 4-wire (Data, Clock, V+, GND) addressable LEDs including WS2812B, SK6812, APA102, and similar. Supply voltage can be 5 V, 12 V, or 24 V.

Q4: How many LEDs can I connect?

A: It depends on the LED voltage, power supply capacity, and cooling. The SLWF-09 is rated for up to 10 A total LED current with proper heat dissipation.

Q5: How do I power the device?

A: You can use:

    USB-C (5 V only, suitable for testing or small LED loads)

    VIN terminal (5 V–24 V)

    PoE module with IEEE 802.3af PoE switch/injector

    Q6: How do I update the firmware?

    A:

      OTA: via WLED web interface → Config → Security & Updates

      Web-based flasher: smlight.tech/flasher/#SLWF-09

      USB-C: using esptool.py or similar

      Q7: The Ethernet connection is not working, what should I check?

      A:

      • Ensure the Ethernet module is fully seated in its connector.

      • Verify the cable and router/switch port are working.

      • Check that your router’s DHCP is enabled.

      Q8: Does the PoE module support passive PoE?

      A: No, only IEEE 802.3af active PoE is supported.

      Q9: How do I enable sound-reactive effects?

      A: Install the Microphone add-on, then enable “Sound Reactive” mode in WLED settings.

      Q10: Can I use SLWF-09 with ESPHome?

      A: Yes, you can flash ESPHome firmware using the web flasher or USB-C. Make sure to configure GPIO mapping according to the “GPIO Allocation” chapter.

      Q11: Can I run the SLWF-09 in both Wi-Fi and Ethernet modes at the same time?

      A: Yes, the ESP32 can maintain Wi-Fi and Ethernet simultaneously. However, WLED will usually prioritize Ethernet for control traffic.

      Q12: How do I reset the device to factory defaults?

      A: HoldReflash device using this tool https://smlight.tech/flasher/#SLWF-09

       

      Can I power the BOOT/Flashcontroller buttonby POE and use 24V input for the LEDs?

      5+ secondsA: untilYou can only use one power source at a time: either PoE or external DC power.
      It is STRICTLY FORBIDDEN to power the device simultaneously from different power sources.

       

      Is it normal that powering the unit to I don't see any status led visible?

      A: Yes it is normal, by default the indicators are not on but you can press one of the buttons and you will see the LED blinks rapidly. The SLWF-09 will reboot into AP mode.indication.