ESP32 Forum

Hi guys, I am planing to create my first PCB for a grow tent, I added three sensors including SCD-30, SHT30 and MLX90614. Attached two pictures of the board. Do you have any recommendation or improvements?

Feedback very welcome

Best
fri

So, you are planning to use the I2C bus over a cable. There is a possibility that clock line effects the data line. When you drive the clock line to ground strongly, it causes glitches on the data line via capacitive coupling while data is at high level through the pull up resistor. You may want to separate clock and data on the cable even if they are next ot each other on the connector.

Check section 16.3 "Wiring pattern of the bus lines" in this document.

https://www.i2c-bus.org/fileadmin/ftp/i ... n_1995.pdf