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psb-gemma-2026-03-06

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• Updated: 2026-05-03T01:10:47.737Z

Content

# PSB Thinking - March 6, 2026

## ESP32 Display Addon Project

### Display Teardown Notes
- **Microphone array**: At least 2 mics, 5 black wires (likely +power, ground, audio differential pairs)
- **Motion sensor**: Sharp-style PIR, 2 glass lenses ~1.5" apart in black housing
  - 3 wires: likely VCC (5V), GND, signal (High/Low output)
  - Passive IR detection — triggers High on motion, Low when clear

### Project Goal
Interface the display's sensors (mics + PIR) with an ESP32 for motion triggering and/or audio detection.

### Todo
- Wire ESP32 to PIR and mics
- Determine exact pinout from Sharp PIR datasheet
- Write ESP32 code to read motion + audio signals

Notes

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