Temperature and Humidity Sensor Node Design
Thought for 5 sec
I’m blocked because this project has no execution credits available, so I can’t add components, wire the schematic, consult datasheets, run review, or create project documentation right now.
Current project state:
- Project is still empty.
- Components: 0
- Nets: 0
- No schematic or layout changes have been made.
What remains to be done once credits are available:
- Rename/project-define it as a USB-C powered Wi-Fi/BLE temperature and humidity sensor node.
- Select the core parts:
- Ultra-low-power Wi-Fi + BLE 5.x MCU/module, likely ESP32-C6 / ESP32-C3 class depending on exact power and feature targets.
- Digital temperature/humidity sensor, likely I²C.
- USB-C receptacle configured for 5 V default-source operation.
- Power-path protection: reverse protection, overvoltage protection, undervoltage lockout, overcurrent protection, and ESD protection.
- 3.3 V regulator sized from a full power budget for 0.5–3 A USB-C source compatibility.
- Build the schematic with:
- USB-C CC resistors for sink mode.
- Input fuse/current protection.
- OVP/UVLO/load-switch or eFuse stage.
- 5 V to 3.3 V regulation.
- MCU/module with required boot straps, decoupling, programming/debug access, and RF antenna keepout.
- T/RH sensor with pull-ups and decoupling.
- Verify every IC against datasheets.
- Run schematic review/ERC and fix all violations.
- Create bring-up and firmware starter notes.
- After schematic approval, proceed to PCB placement and routing.
Once credits are available, I can continue from the empty project and build the full validated schematic first.
Manual parts list
Schematic architecture
Power budget
USB-C protection parts
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