Temperature and Humidity Sensor Node Design
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.
Thought for 5 sec
I’m blocked from executing design changes right now because AI features are unavailable due to no available ACUs. No schematic, components, wiring, PCB layout, or project documents have been created yet; the project is still empty.
What remains to do:
- Select the Wi‑Fi/BLE MCU/module, digital temperature/RH sensor, USB‑C receptacle, 5 V input protection, and 3.3 V regulator.
- Build the schematic with USB‑C default 5 V sink CC resistors, reverse/OVP/UVLO/OCP protection, regulator, MCU, sensor, decoupling, programming/debug, reset/boot, and test points.
- Create consumer-use documentation: power budget, bring-up plan, firmware starter notes, and regulatory/compliance notes for Wi‑Fi/BLE.
- Verify ERC/design review, then proceed to PCB placement/routing with RF antenna keepout and USB-C/protection layout constraints.
A strong default architecture would be: USB‑C 5 V input → protection/eFuse/load switch with OVP/UVLO/OCP → high-efficiency 3.3 V buck or low-Iq regulator → ESP32‑C6 or ESP32‑C3 module → Sensirion SHT4x/SHTC3-class I²C T/RH sensor.
Pick specific parts
Create requirements note
Low-cost BOM target
USB-C sink wiring
No schematic yet
Talk to Flux to get started.
