Temperature and Humidity Sensor Node Design
Thought for 3 sec
Work done
- Built the USB-C powered ESP32-C3 temperature/RH sensor node schematic with USB-C CC pull-downs, TPS259530 protection, TLV75533 3.3 V regulation, SHTC3 I2C sensor, decoupling, reset/boot circuitry, UART header, and GPIO2 boot strap pull-up.
- Cleaned ERC warnings by wiring R10 and marking unused ESP32-C3 GPIOs intentional no-connects.
- Set the PCB to a 50 mm × 50 mm rounded 4-layer board and placed all components with USB-C at the edge, ESP32 antenna at the top edge, sensor away from heat, and header accessible on the right.
- Updated Design Notes and created Firmware Starter — ESP32-C3-MINI-1-N4.
- ✅ Required schematic components and power protection are present.
- ✅ Electrical support parts are included: CC resistors, I2C pull-ups, 100 nF decoupling, EN RC reset, BOOT controls, and programming header.
- ✅ ERC is clean for the checked schematic issues; footprints, invalid layers, and overlapping copper checks pass.
- ✅ Preliminary PCB layout planning is complete with board outline, stackup, and RF-aware placement.
- ⚠️ Routing is not complete yet: the board still has 43 airwire reports because traces have not been routed.
- Route the PCB next, then re-run DRC/airwire checks and prepare manufacturing exports if desired.
Route remaining airwires
Full design review
Prepare manufacturing exports
Verify antenna keepout
