Wi-Fi and Bluetooth Sensor Node Design
Make me a temperature and humidity sensor node with Wifi and Bluetooth, powered by USB-C (5V) for consumer use.
It should be a low-power environmental node with a digital T/RH sensor, ultra-low-power MCU with Wi-Fi + Bluetooth (dual-radio) — 2.4 GHz 802.11 b/g/n plus BLE 5.x powered by USB-C (5 V) — USB-C receptacle 5 V default; include reverse/OVP/UVLO/OCP protection and plan for 0.5–3 A sources.
Thought for 1 sec
I’m blocked from executing design actions because this session has no remaining tool credits, so I could not modify the schematic or run validation.
Current project state:
- No components have been added.
- No nets or schematic wiring have been created.
- No datasheets, ERC, or layout checks were run.
Recommended implementation plan when credits are available:
- Use an ESP32-C6 or ESP32-S3 module for 2.4 GHz Wi-Fi 802.11 b/g/n + BLE 5.x.
- Add a digital temperature/RH sensor such as SHT4x/SHTC3 class over I²C.
- Add USB-C receptacle configured as 5 V sink with CC pull-downs for default USB-C current advertisement.
- Add input protection: USB polyfuse/eFuse with OVP, UVLO, OCP, reverse-current blocking, and ESD/TVS protection.
- Add 5 V to 3.3 V regulation sized from a proper power budget for 0.5–3 A-capable USB-C sources.
- Add all required decoupling, I²C pull-ups, boot/config straps, programming/debug header, status LED, and antenna keepout.
- Complete schematic first, run ERC/review until clean, then proceed to PCB layout with RF-aware placement and routing.
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USB-C current choice
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