USB-C Sensor Node
Worked for 4 mins 26 sec
Implemented the schematic for the USB-C powered Wi‑Fi/BLE temperature/humidity node. It uses a SiWG917 Wi‑Fi/BLE 5.4 module, SHT41 T/RH sensor, USB-C sink input, TPS25940 true reverse-blocking eFuse with OVP/UVLO/OCP/soft-start, MP28301 3.3 V buck regulator, ESD protection, reset/ISP/SWD debug, I2C pull-ups, and status LED.
Created project files:
Open items:
- PCB layout/routing is not done yet, so airwire DRC errors are expected.
- Generic passives still need final manufacturer MPNs before manufacturing export.
- Layout must enforce the SiWG917 antenna keepout and thermal isolation around the SHT41.
Suggested next steps:
- Set board size/stackup and move into PCB placement.
- Place U1 at the board edge with antenna keepout and U4 away from heat sources.
- Route power, buck, I2C, SWD/UART, and USB-C protection paths.
- Assign final passive MPNs and run full DRC/manufacturing checks.
Thought for 5 sec
The schematic is complete with 46 components and 31 nets: SiWG917 Wi‑Fi/BLE, SHT41 sensor, protected USB‑C input, TPS25940 reverse-blocking eFuse, MP28301 3.3 V buck, ESD protection, controls, and debug access. Documentation for requirements, firmware, bring-up, and regulatory planning was also created.
Remaining work:
- PCB outline, stackup, placement, and routing
- SiWG917 antenna keepout and SHT41 thermal isolation
- Final passive MPN assignment
- PCB DRC and manufacturing validation
- Review the attached text and apply any requested changes
I can’t open or process the attachment now because the account has no available ACUs; AI features will resume when ACUs are available.
Review attached requirements
Set up board placement
Finalize passive BOM
Plan critical placement
Check design issues
