USB-C WiFi BLE Sensor Design
Worked for 1 min 34 sec
I captured the requirements and power budget in project files, and the regulator choice will be based on a ~560 mA 3.3 V peak load rather than a small marginal LDO.
Worked for 12 mins 8 sec
I started the USB-C WiFi/BLE temperature-humidity sensor node and made concrete project progress before tool execution stopped.
Completed:
- Renamed the project to USB-C WiFi BLE T-RH Sensor Node and updated the description.
- Created a project specification file capturing the architecture, assumptions, USB-C 5 V input, WiFi/BLE, digital T/RH sensing, protection, and layout expectations.
- Created a power-budget file. The design is sized around a ~560 mA 3.3 V peak load, so I selected a buck-regulator direction instead of a thermally marginal small LDO.
- Selected and added main schematic parts:
- ESP32-S3-WROOM-1 WiFi/BLE module
- SHT40-AD1B-R2 I2C temperature/humidity sensor
- USB-C receptacle
- TPS25210L eFuse/protection IC
- MP28301 3.3 V buck regulator
- USBLC6-2SC6 USB data ESD protection
- Boot/reset switches, status LED, inductor, and required passives
- Consulted datasheets for the ESP32-S3 module, SHT40 sensor, TPS25210 protection IC, USBLC6 ESD array, and USB-C connector.
Remaining work:
- Finish datasheet extraction for the MP28301 buck regulator.
- Wire the schematic: USB-C CC/VBUS/data, eFuse protection, 3.3 V buck, ESP32 USB/I2C/boot/reset, SHT40, LED, and all decoupling.
- Add or adjust any buck feedback/support parts required by the MP28301 datasheet.
- Run schematic review/ERC and fix all violations.
- Create firmware starter and board bring-up project files.
- Only after the schematic is clean, move to layout with user confirmation.
Finish buck design
Wire full schematic
Run ERC check
Add bring-up notes
Optimize module choice
