The scenario
A compact ESP32-based weather station PCB requires clean 3.3V power, I2C pull-ups, and two environmental sensors sharing one bus.
What is in this drawing
Read the decisions behind it.
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.
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