Temperature and Humidity Sensor Node Design
Thought for 2 sec
I’m blocked because the project has no remaining execution credits, so I can’t modify the schematic or call design tools right now.
Current project state:
- No components have been added.
- No nets or schematic wiring exist yet.
- The project is still an empty draft.
Recommended design direction when execution is available:
- MCU/radio: ultra-low-power Wi-Fi + BLE 5.x module, likely ESP32-C6 / ESP32-C3 class depending on BLE/Wi-Fi requirements.
- Sensor: digital temperature/humidity sensor over I²C, e.g. Sensirion SHT4x/SHTC3-class device.
- USB-C input: USB-C receptacle configured for 5 V sink/default current with CC pull-downs.
- Protection/power path:
- USB-C VBUS reverse-current/reverse-polarity protection
- OVP/UVLO/OCP load switch or eFuse sized for 0.5–3 A capable sources
- Input TVS/ESD protection
- 5 V to 3.3 V regulator sized from a proper power budget
- Required support:
- Decoupling on every IC power pin
- I²C pull-ups
- RF antenna keepout and layout constraints
- USB-C ESD protection and safe current handling
- Consumer-use protection margins and review checks
Next step when credits/tools are available: build the schematic from the USB-C power path through protection/regulation, MCU/radio, sensor, programming/debug, and then run review until clean before moving to PCB layout.
Choose exact parts
Save requirements note
Estimate power budget
USB-C protection circuit
Board placement strategy
No schematic yet
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