Here are some examples:
1) The values for the caps in and inductor on Sparkfun's antenna subcircuit don't match Espressif's guidelines
2) The caps on the crystal oscillator (10pf for 26MHz) on Sparkfun's circuit are a tenth of what Espressif recommends (100pf for 40MHz)
I understand that some variation may be due to specific external ICs that were chosen, but I'm wondering why the designers of the ESP32 Thing would have deviated from the recommended application notes?
Please feel free to recommend better ways to ask this question! I'm new.
ESP32 Hardware Design Guidelines:
https://www.espressif.com/sites/default ... nes_en.pdf
Sparkfun ESP32 Thing schematic:
https://cdn.sparkfun.com/assets/learn_t ... ematic.pdf