A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

PeterMenkveld
Posts: 2
Joined: Wed Oct 24, 2018 3:17 pm

Re: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

Postby PeterMenkveld » Mon Jul 22, 2019 9:06 pm

I am getting the same problem.
I have put the esp32 wrover module on my PCB.
I am trying to upload the code that worked on my dev kit using a usb to serial converter. (with a res divider to get to 3v3)
I added buttons to tie Program and Enable to ground
I have tried pressing EN down then program then letting go of en then Program then running make flash.
I have tried holding en down during the entire duration of make flash.
I added a 10uF cap between en and ground.
I have kinda run out of ideas. I am getting a solid 5V on the serial line and 3v3 on my board.

Please help,
Thanks

msysmilu
Posts: 2
Joined: Fri Sep 27, 2019 7:50 pm

Re: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

Postby msysmilu » Tue Aug 18, 2020 2:55 pm

I had a consumer (relay module) connected to the 3V3 module; disconnected it and then it worked.

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