Add the minimum required components needed for this Pi Pico 2 to function properly. Keep the design as simple and minimal as possible.
You may include a single humidity sensor as the primary peripheral, along with any essential supporting components such as power regulation, pull-up resistors, decoupling capacitors, or required connectors.
I’ll keep this minimal: inspect the Pico 2 shield pins, choose a simple 3.3 V I2C humidity sensor, add only required pull-ups/decoupling, wire it to the Pico 2’s existing 3V3/GND/GPIO pins, then run checks and fix any real issues.
The sensor block is wired. Review found the remaining issues are unused Pico 2 shield header pins, so I’m marking unused pins intentional and tying all ground header pins together to keep the minimal schematic clean.
Done — I added the minimal SHTC3 humidity/temperature sensor circuit with only the required 100 nF decoupling capacitor and 10 kΩ I2C pull-ups, wired to Pico 2 GPIO4/GPIO5, 3V3, and GND.
ERC is clean with zero unresolved electrical violations. I also created Minimal Pico 2 Humidity Shield Design Notes with the pin map, datasheet rationale, and power budget.
Next step is PCB placement/layout when you’re ready.