Note: PCB is still very much work in progress
PCB files for a for ESP32 board that can attach an INMP441 or ICS-43434 I²S microphone. It is intended to use together with SR-WLED for mixing sound reactive and addressable LEDs together.
The INMP441 is an omnidirectional digital microphone which communicates via I²S. It can be bought from a number of places, for example Aliexpress.
Hookup instructions is taken from the SR-WLED wiki.
| from INMP441, ICS-43434 | to ESP32 GPIO | |
|---|---|---|
| L/R | Gnd | ground => left channel. Don't leave this pin unconnected! |
| SD | 32 | serial data |
| WS | 15 | left right clock |
| SCK | 14 | serial clock |
| VDD | 3.3V | power don't use 5V! |
| GND | Gnd | ground, 0V |
- Fetch the binary from SR-WLED and flash to ESP32 board
- Boot up WLED device and go to the "Sound setting" menu
- Select
Generic I2S - Reboot device
- Have fun with sound reactive LEDs