Thanks for looking at the schematic; I don't expect I've made an egregious error. I was simply flashing a blink program using the Arduino IDE. Do you want these binary files? Is there some place to get the firmware for using the ESP32 flash tool? With no binaries I never got a proper response using ...

5V? I thought the ESP32 like the ESP8266/85 was a 3V3 MCU. I have a 500 mA 3V3 LDO that provides power through the USB cable or LiPo battery. This set up is sufficient for the ESP8266 and ESP8285. If it requires 5V no wonder it doesn't work. I am pretty sure it requires a clean 3v3 Vin and I have th...

Correct, no mac address...

I am using the Arduino IDE, but i also tried the ESP flash tool and i cannot detect a mac address even though the chip sync is OK. I don't have the firmware files though for the flash tool. Where can i find these?

Not much of the basic circuitry; I mean it pretty much conforms to the espressif reference design. I did change the board size, layout, components, component sizes, etc. I am using a four-layer board, I think Saprkfun usually uses two layers. Sparkfun uses gigantic components and I prefer smaller on...

The EAGLE design files and pcb design are open source and listed at the OSH Park shared space here:

https://www.oshpark.com/shared_projects/sHwYbfxM

I would appreciate any advice you could offer...

Thank you for taking a look.

I started with Sparkfun's ESP32 thing and modified a few things. One thing I was no sure about was whether I needed to connect ESP32 FLASH_VDD to 3V3; I left it unconnected and powered the flash with 3V3 from the board. Is this going to be a problem?

How is it possible for any ESP32 development board or module to function properly if the spurious reset on power up (I am seeing this on my board) cannot be worked around in software? Does this mean the 100 ESP32 chips i just bought are garbage? This is quite frustrating.

I have the same issue, did you ever solve this?

Hi All, I designed my own ESP32 development board following the espressif reference design and cribbing from Sparkfun's ESP32 thing, but it is a smaller (0.7 x 1.4 inch) design and uses a FTDI230XQ USB to Serial converter for programming, etc. I put the first one together, and upon power on the blue...