While not my first board it is only my 3rd and the 2nd was a reprint of my first because I made a stupid mistake. So learning from my mistakes I thought I would ask for some extra eyes to make sure I didn't miss anything obvious. This is, I think, pretty straight forward. I have a number of Atom M5 Lites laying around and I wanted to create a nice package that would allow me to measure T&H for my Home Assistant. With that in mind I designed the PCB. I picked the Capacitor and resistor and LED based on what were "Basic" parts so hopefully I didn't make any crazy mistakes. Since the ATOM is based off of the ESP32 and that's a 3.3V logic chip I hope I'm safe in leaving off the voltage shifter. I didn't see anything on the SHT40 which indicated that it drew more than the 100mA that the 3.3V pin on the ATOM can provide. The link to my project [https://oshwlab.com/quickstar77/m5sensorshield](https://oshwlab.com/quickstar77/m5sensorshield) One of my concerns is if having pins connected to the GPIOs that I'm not using will cause issues. Should I attach them to ground or maybe a resistor?   [SHT40](https://sensirion.com/media/documents/33FD6951/63E1087C/Datasheet_SHT4x_1.pdf) [ATOM Lite M5stack](https://docs.m5stack.com/en/core/atom_lite) [Capacitor](https://datasheet.lcsc.com/lcsc/2211101700_YAGEO-CC0603KRX7R9BB104_C14663.pdf) [Resistor](https://datasheet.lcsc.com/lcsc/2206010045_UNI-ROYAL-Uniroyal-Elec-0603WAF1002T5E_C25804.pdf) [LED](https://datasheet.lcsc.com/lcsc/1811101510_Everlight-Elec-19-217-GHC-YR1S2-3T_C72043.pdf)