Sy

Light system | SynLight + WLED

(2025)

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1. Presentation

Mixing together the SynLight project with a WLED controller.

I wasn't about to dive into the WLED's source code to add my (as of yet) vaguelly defined fonctionalities. I instead use some TS5A3159 analog switches to select which one of three ESP32 controllers should drive the LEDs. One ESP32 controller runs SynLight, one runs WLED, and another one is the conductor.

2. Parts

• XIAO ESP32C6 with USB-C (for signal selection)
• XIAO ESP32C6 with USB-C (for SynLight)
• ESP32 NodeMCU with USB-C (for WLED and I2S audio support)
• INMP441 I2S microphone (so that WLED can react to the sound)
• TS5A3159 analog switches (to select which of the three ESP32 drives the LEDs)
• VL53L0X distance sensor, in the form of the TOF200C-VL53L0X (so that the conductor can circle the modes)
• Cherry MX style slim mechanical switch (so that the controller can cycle through the modes)

3. Schematic and board

Schematic
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Board
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4. How

The ESP32 running the SynLight code acts as a secondary controller in this system. It simply runs SynLight while holding a signal pin high for the main controller. Same story for the WLED controller, minus the signal pin. The master waits for either a button press or a distance sensor detection to cycle through the modes. A rising edge on the UDP signal pin also has the master changing the mode to 0:

5. Result

Top and bottom view of the PCB

Setup in place behind my TV