Thanks for the tips!

It looks like with esptool I can both write and read to/from the flash ok, from what I understand.

I've also tried other firmware such as that of micropython and nodemcu, with the same rebooting loop.

I also tried turning off the hardware brownout detection in the firmware ...

Just wondering if anyone can spot any hardware issues with the attached schematic?

When doing - picocom /dev/ttyUSB0 -b115200
I notice the esp32 keeps rebooting unfortunately.

I was able to flash the 'getting started' example, which appeared to flash fine, but unfortunately I can't seem
to get it ...

Thanks a lot for your reply.

I just measured the xtal pins and there definitely seems something weird.

I've not tried to measure an xtal frequency before, but hopefully I've done this correctly, I set AC coupling, and measured pin 3.

This should be the xtal which has been placed - https://www ...

Hi,

I just found this forum, after I made my PCB, I wish I'd seen it sooner ;)

With esptool I get the error 'Timed out waiting for packet header' when trying to connect.

I've attached a schematic and pcb photo, I have since added a 10K pull up resistor on GPIO0 to 3.3V, so that the correct logic ...