Hardware Overview

Hannah's satellites run on a custom ESP32-S3 PCB (88mm round), currently at Rev. 5:

• ESP32-S3-WROOM-1U-N16R8 (external antenna)
• 4× PDM microphones via an ADAU7118 PDM→TDM converter (enables beamforming)
• WS2812B/SK6812-family LED ring
• MAX98357A speaker amp
• BME680 environmental sensor (temperature, humidity, pressure, gas/IAQ)
• LD2410 mmWave presence radar

See PCB Revisions for the full revision history, Component Decisions for why specific parts were chosen, and Enclosure for the 3D-printed case.