No design changes were made; the project remains empty because no ACUs are currently available for AI execution. Remaining work is to select the low-power Wi‑Fi/BLE MCU and digital temperature/RH sensor, design the protected USB‑C 5 V power path (reverse polarity, OVP, UVLO, and OCP for 0.5–3 A sources), create and verify the schematic, then proceed through PCB layout, RF/antenna review, and consumer-product validation.