I’m blocked from executing design actions because this session has no remaining credits, so I could not add components, wire the schematic, run datasheet checks, or perform review validation.
Current project state remains unchanged:
- Components: 0
- Nets: 0
- Project is still the empty draft: “Interior Rose Massive Robot Spider”
- No schematic, layout, power budget, or documentation has been created yet.
Recommended next design plan when credits are available:
- Rename/project-document the design as a USB-C Wi-Fi/BLE temperature-humidity sensor node.
- Select an ultra-low-power Wi-Fi + BLE 5.x MCU/module, likely ESP32-C3/ESP32-C6-class or similar, with 2.4 GHz 802.11 b/g/n and BLE 5.x.
- Add a digital temperature/RH sensor over I²C, such as Sensirion SHT4x/SHTC3-class, with datasheet-confirmed pull-ups and decoupling.
- Design USB-C 5 V default input with CC pull-downs for sink mode.
- Add front-end protection for consumer USB-C use:
- ESD protection on USB-C pins
- Reverse-current/reverse-polarity protection where applicable
- OVP/UVLO/OCP load switch or eFuse sized for 0.5–3 A sources
- Input capacitance per protection-device datasheet
- Add 3.3 V regulation sized from a full power budget, including Wi-Fi transmit current peaks.
- Add programming/debug access, reset/boot circuitry, status LED, and optional test points.
- Verify all ICs against datasheets, add required decoupling, run ERC/review until clean.
- Create bring-up, firmware, and regulatory documentation since the product is wireless and consumer-facing.
Once credits are restored, the first executable step should be schematic creation and datasheet-grounded part selection.