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  VS Arduino › Visual Micro › Visual Studio 2019, 2022, 2026 › ESP32 upload fails with A fatal error occurred: Failed to connect to ESP32: Timed out waiting for pa
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Normal Topic ESP32 upload fails with A fatal error occurred: Failed to connect to ESP32: Timed out waiting for pa (Read 1410 times)
FrankP
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ESP32 upload fails with A fatal error occurred: Failed to connect to ESP32: Timed out waiting for pa
Dec 7th, 2023 at 8:07pm
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I recently started working with ESP32, but am having problems with 'blink' program.  I can upload fine as long as nothing is connected to GPIO pins.  Otherwise I get the dreaded 


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

message.  I have googled this and found numerous 'solutions', none of which worked for me. I did find there might be an issue with compile options for the ESP32 Wrover module, so I looked in vMicro options for this.   

I reduced upload speed to 115200, but this had no effect.  I'm not sure what the other options relate to, so I'm a bit reluctant to start changing them.  Has anyone else gotten this module upload reliably?

TIA,

Frank
  
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FrankP
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Re: ESP32 upload fails with A fatal error occurred: Failed to connect to ESP32: Timed out waiting for pa
Reply #1 - Dec 8th, 2023 at 2:49am
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Well, for some reason this is now working fine. I can upload programs to the ESP32 even with the same circuit connection as before (a 240-Ohm resistor and an LED in series).

No clue what I did (or didn't) do to make this work, other than the fact that I uploaded several programs with nothing connected, and then discovered it was still working with the LED/resistor circuit connected.

I have a PhD in electrical engineering and I'm stumped by the simplest of projects - Go figure.   Grin
  
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