USB-C Sensor Node
Worked for 4 mins 28 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.
wont you placed on pcb and draw the lines
Set up the board size and stackup, then place the components for RF and thermal best practices.
Thought for 3 sec
Understood. The schematic and supporting design documents are complete, but no PCB board outline, stackup, placement, or routing has been created yet.
I can’t execute the PCB setup now because the account has no available ACUs. Remaining work is to define the board dimensions and stackup, place the SiWG917 at a board edge with its antenna keepout clear, thermally isolate the SHT41 from the regulator/MCU/USB-C area, place protection and buck components tightly, then route and run DRC.
Set board and place
Add RF keepout
Separate heat sources
Tight power placement
