ESP32 Doorbell

Simple ESP32-S3 project for playing short WAV sounds (doorbell, notifications) via I2S amplifier.

Hardware

• ESP32-S3
• MAX98357A (I2S DAC + amplifier)
• 4Ω speaker (e.g. Visaton FRS 10 WP)

Features

• play WAV from flash (LittleFS)
• low-latency sound trigger
• suitable for doorbell / simple notifications

Wiring (example)

MAX98357A	ESP32
VIN	5V
GND	GND
LRC	GPIO4
BCLK	GPIO5
DIN	GPIO6

Build & upload

pio run
pio run -t upload
pio run -t uploadfs

Notes

• use mono 16-bit WAV (22.050 kHz)
• add bulk capacitor (~1000 µF) on 5V if audio is unstable

License

MIT