There is a delay circuit there for reset, of course. If that's what you meant by an 'RC network,' yes, it's there.

Hi. I'm trying to run the FabGL VGA library on my own ESP32 system. It generates the RGB signals okay, but the synch signals (both vertical and horizontal) are scrambled; I just get a crazy oscillation there. The only perhaps significant difference between what I am doing an a LilyGO VGA32 developme...

What I'm not seeing in your schematic is a RC-network on the EN input of the ESP32; is it simply out of view or did you not put one in? No, there isn't one; there's just an open-collector RST/EN network. The reset button connected to RST/EN has a capacitor and charging resistor for delay purposes; ...

Answering my own question, I managed to 'unbrick' the ESP32 (i.e. upload new sketches) by pulling IO0 (I/O zero) down with 10K Ohm. Apparently, Q1 is not sinking current strongly enough to counter the ESP32's internal pull-up on IO0 after the ESP32 is programmed the first time. According to the spec...

Hi all, I'm building a board very similar to common ESP32 development systems (such as the LilyGO VGA32), but which uses an ESP32-PICO-D4 core, not a shielded system. It also doesn't have the SENSOR capacitors. See diagram attached. 5V, D+ and D- come from the USB port, as usual. I can program a bla...