Temperature and Humidity Sensor Node Design

0xl0r3nz0

0xl0r3nz0

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’ll create your low‑power USB‑C Wi‑Fi + BLE temperature/humidity sensor node with robust protections.
Planned steps:
  1. Add core blocks: dual‑radio MCU (Wi‑Fi b/g/n + BLE 5.x), digital I2C T/RH sensor, USB‑C receptacle (sink), low‑Iq 5V→3.3V buck, protection IC (reverse/OVP/UVLO/OCP), TVS/EMI parts, programmer header, user LED/button.
  2. Power/protection: CC resistors for USB‑C sink; input filter + TVS; eFuse‑class protection ahead of buck; sensor/LED power gating for sub‑5 µA sleep; full decoupling per datasheets.
  3. Nets: I2C with pull‑ups, interrupts, UART/programming; test points for 5 V/3.3 V/GND.
  4. Layout: antenna keepout for 2.4 GHz; isolate sensor from heat; low‑cap USB data‑line ESD (<1 pF per line); size connector/power traces for up to 3 A.
  5. Reviews: ERC/DRC, availability, footprints; finalize BOM.
Click Start on the plan bar to proceed, or tell me changes you want (e.g., sensor accuracy, MCU vendor, size constraints).
Pick MCU family
Sensor choice details
Protection IC selection
Power budget question
Mechanical and antenna constraints
No schematic yet

Talk to Flux to get started.

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