Key points
- Distance readings jitter — layered filtering separates a person from noise, because false triggers make the product unusable.
- A cooldown after each trigger — announcing the whole time someone stands there drains the battery in a day.
- Volume survives a power cycle — a setting that resets on every reboot is a setting nobody uses.
Development record
- Sector
- Audio Hardware Manufacturing
- Target chipset
- ESP32 (ESP-ADF)
- Status
- Delivered
- Scale
- Undisclosed
- Period
- 2026-05 ~ 2026-08
- Stack
- ESP32ESP-ADFI2SModbusMQTTNVS
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