Make me a temperature and humidity sensor node with Wifi and Bluetooth, powered by USB-C (5V) for consumer use.
It should be a low-power environmental node with a digital T/RH sensor, ultra-low-power MCU with Wi-Fi + Bluetooth (dual-radio) — 2.4 GHz 802.11 b/g/n plus BLE 5.x powered by USB-C (5 V) — USB-C receptacle 5 V default; include reverse/OVP/UVLO/OCP protection and plan for 0.5–3 A sources.
I’ll build your low‑power Wi‑Fi (802.11 b/g/n) + BLE 5.x T/RH node powered from USB‑C 5 V with full protection. Plan summary:
Add dual‑radio MCU module and digital T/RH sensor, plus passives.
Add USB‑C sink: CC pulldowns, bidirectional TVS (<1 pF on data), and eFuse power‑path (reverse/OVP/UVLO/OCP) rated to 3 A.
Add 5 V→3.3 V buck regulator sized for radio peaks with bulk/decoupling and clean grounding.
Wire I2C (with pull‑ups), rails, reset/boot/program header, and user LED; then layout with RF antenna keepout and place power/ESD near the connector; route and review.