ESP32 LED Board
Worked for 4 mins 32 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 9 sec
No changes were made because the account currently has no available ACUs.
Remaining work:
- Remove the existing USB-C environmental-sensor design.
- Rebuild around an ESP32, CH340 USB-to-UART programmer, and Micro-USB connector.
- Add five independently controlled LED circuits with current-limiting resistors.
- Include 3.3 V regulation, ESP32 boot/reset circuitry, USB protection, decoupling, and CH340 auto-programming connections.
- Verify the completed schematic with ERC.
Specify ESP32 module
Choose LED GPIOs
Use Micro-USB input
Set up power safely
