USB MICROPHONE AND CLOCK / ESP32 APPLICATION
Dotmic
Push-to-talk USB microphone and dot-matrix clock for the S3AI Game (ESP32-S3) handheld. Real FFT spectrum, NTP clock, UAC1 audio input.
About this project
About this project
Hold the AI key, talk, release to mute: the S3AI handheld enumerates as a standard UAC1 USB microphone — mono, 48 kHz, 16-bit — and any recorder on the host can use it, because speech-to-text happens on the computer. While you speak, a 240×240 ST7789 shows a real 1024-point Hann-window FFT split into 24 bands across roughly 94 Hz to 12 kHz; when you stop, it falls back to a clock synced over Wi-Fi against `ntp.aliyun.com`, `time.cloudflare.com` and `pool.ntp.org`, displayed in Beijing time. Install is application-only through the Launcher SD browser, never at flash offset `0x0`. Audio quality and sleep current were not measured on hardware.
From the README
From the README
- Display
- 240x240 ST7789, SPI mode 0, 40 MHz
- Input
- MSM261S I2S, BCLK 4, WS 5, DIN 6
- Feature
- 48 kHz PCM, 1024-point Hann window
- Limit
- cannot pair as an ordinary Bluetooth headset microphone
Hardware
Boards: ESP32-S3
Supported hardware: ESP32-S3. Confirm the exact board revision and pin map in the upstream repository.
What the source supports
Upstream evidence: Reviewed from public README media at commit fdfa3e69504f under MIT. Firmware was not executed.
Media credit & rights
Upstream project media · rights remain with its owner · Credit: sameclub
Screenshots decoded from the upstream README at a pinned commit. Repository code and firmware were not executed; the license texts are included in the preview package.
View original source ↗ Copyright & removal · Reviewed
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