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1.8 KiB
1.8 KiB
ESP32 Soundboard
Soundboard (computer program), a web application or computer program with buttons that play short, often humorous sound clips.
Hardware
Wiring
SD card
| SD card pin | ESP32 pin | Notes |
|---|---|---|
| CS | GPIO05 | |
| DI | GPIO23 (MOSI) | |
| SCK | GPIO18 (SCK) | |
| DO | GPIO19 (MISO) | |
| CD | GPIO17 | optional |
Touch
| ESP32 Touch pad | GPIO | Notes |
|---|---|---|
| T0 | 04 | |
| T1 | 00 | also bootloader (not usable on dev board) |
| T2 | 02 | also bootloader (not usable on dev board) |
| T3 | 15 | |
| T4 | 13 | |
| T5 | 12 | |
| T6 | 14 | |
| T7 | 27 | |
| T8 | 33 | |
| T9 | 32 |
I2S
| MAX98357A | ESP32 pin |
|---|---|
| LRC | 25 |
| BCLK | 26 |
| DIN | 22 |
| GAIN | (VCC) |
| SD | - |
Build
git clone https://dev.xd0.de/hendrik/soundboard.git
cd soundboard
virtualenv .
source bin/activate
pip install -U platformio
platformio run -t upload && platformio device monitor -b 115200
- Convert mp3 files:
sox ~/Music/input.mp3 -c 1 -r 11025 output.wav trim 0 30 - SD card is tested with one FAT16 partion
ToDo
- Prototype
- reimplement tasks with a queue, see i2s_push_sample() from esp-idf/components/driver/i2s.c
- Keypad layout
- internal DAC?
- Add-ons?
- dynamic keypad thresholds
- wav file headers
- stack size in play task