Temperature and Humidity Sensor Node Design

kenimost

kenimost

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.

flux

I’ve prepared a plan to build your low‑power Wi‑Fi + BLE T/RH sensor node powered by USB‑C.
  • Steps:
    1. Add MCU module (dual‑radio Wi‑Fi 802.11 b/g/n + BLE 5.x), digital T/RH sensor, and USB‑C receptacle.
    2. Implement power path: CC resistors, reverse/OVP/UVLO/OCP, TVS, and a low‑IQ 3.3 V regulator with decoupling.
    3. Add RF/antenna (or certified module), programming header, status LED, and test pads.
    4. Wire USB‑C, power rails, I2C, and control nets; add pulls/filters; run ERC/DRC.
    5. Prepare PCB footprints and RF‑aware placement; run auto‑layout and review.
Click Start on the plan bar to execute. Preferences before we begin:
  • MCU: certified module (smaller/faster to certify) or chip‑down?
  • Sensor: SHT4x/SHT3x, HDC3xxx, or your preference?
  • Size constraints or enclosure?
  • Any specific protection ICs (ideal diode/OVP switch, eFuse), or should I pick proven parts?
Choose certified MCU module
Pick sensor family
Define enclosure constraints
Select protection approach
Clarify USB-C behavior
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