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ESP32 Soundboard
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Soundboard (computer program), a web application or computer program with buttons that play short, often humorous sound clips.
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## Hardware
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* [ESP32] µC
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* [MAX98357A] PCM Input Class D Audio Power Amplifiers
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* [SD card]
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## Wiring
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### SD card
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ESP32 pin | SD card pin | Notes
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--------------|-------------|------------
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GPIO14 (MTMS) | CLK | 10k pullup
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GPIO15 (MTDO) | CMD | 10k pullup
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GPIO2 | D0 | 10k pullup, pull low to go into download mode
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GPIO4 | D1 | 10k pullup; not used in 1-line mode
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GPIO12 (MTDI) | D2 | otherwise 10k pullup (see note below!); not used in 1-line mode
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GPIO13 (MTCK) | D3 | 10k pullup needed at card side, even in 1-line mode
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N/C | CD |
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N/C | WP |
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## Build
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```bash
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git clone https://dev.xd0.de/hendrik/soundboard.git
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cd soundboard
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virtualenv .
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source bin/activate
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pip install -U platformio
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platformio run -t upload && platformio device monitor -b 115200
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```
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## ToDo
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* Prototype
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* Keypad layout
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* internal DAC?
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* Add-ons?
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## References
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[ESP32 overview]: http://esp32.net
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[ESP32]: https://eckstein-shop.de/ESP32-Dev-Board-WiFi-Bluetooth-CP2102-USB-to-Serial-with-LiPo-charger
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[MAX98357A]: https://eckstein-shop.de/Adafruit-I2S-3W-Class-D-Amplifier-Breakout-MAX98357A
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