USB Sensor Node
Worked for 4 mins 29 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.
Start Auto-Layout
Thought for 2 sec
I can’t analyze or run auto-layout because no ACUs are currently available, so no PCB changes were applied in this session.
Remaining work:
- Inspect the current PCB for unplaced components and unrouted nets.
- Set or verify board outline and stackup.
- Auto-place components with SiWG917 antenna keepout and SHT41 thermal isolation.
- Auto-route required nets and run DRC.
- Apply and verify the layout results once ACUs are available.
Inspect PCB status
Review layout constraints
Check DRC issues
