상황
A compact ESP32-based weather station PCB requires clean 3.3V power, I2C pull-ups, and two environmental sensors sharing one bus.
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01
Single 3.3V rail supplied by V1 with 100nF and 10uF decoupling to stabilize power for MCU and sensors.
02
SDA and SCL lines each have a 4.7k pull-up resistor to VDD, ensuring reliable I2C communication.
03
BME280 and SHT30 are modeled as generic ICs on the same bus, allowing the schematic to remain renderer-friendly while showing connectivity.
Reuse for any ESP32 I2C sensor board where multiple devices share power and bus lines; swap sensor labels or add additional U* devices as needed.