Temperature and Humidity Sensor Node Design

flux

I’m blocked because the workspace has no execution credits available, so I can’t modify the schematic or run component/datasheet/review tools right now.
Current project state:
  • Project is still empty: 0 components, 0 nets.
  • No schematic, layout, power tree, or BOM has been created yet.
  • The project still has the placeholder name “Dry Yellow R2-D2.”
What remains to be done once credits are available:
  1. Rename/document the project as a USB-C Wi-Fi/BLE temperature-humidity sensor node.
  2. Select a low-power Wi-Fi + BLE 5.x MCU/module, likely an ESP32-C6 / ESP32-C3-class module depending on availability and requirements.
  3. Select a digital temperature/RH sensor, likely I²C, low-power, consumer-grade.
  4. Design USB-C 5 V input with:
    • CC pull-downs for default 5 V sink behavior.
    • Input fuse/current protection sized for 0.5–3 A sources.
    • Reverse protection.
    • OVP, UVLO, and OCP protection.
    • TVS/ESD protection.
  5. Add regulated rails, likely 3.3 V for MCU and sensor, with datasheet-required input/output capacitors.
  6. Add MCU support circuitry:
    • Decoupling.
    • Boot/programming access.
    • Reset/enable circuitry.
    • Antenna keepout if using a wireless module.
  7. Wire the T/RH sensor over I²C with pull-ups and local decoupling.
  8. Run schematic review/ERC and fix all issues.
  9. Create bring-up and firmware starter documentation.
  10. After schematic approval, proceed to PCB placement, then pause for confirmation before routing.
Save requirements note
Find wireless modules
Find T/RH sensors
Design power input
Rename project
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Dry Yellow R2-D2

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