ESP32 Course – Mod4 Unit8, ESP32 Web Server

Q&A Forum › ESP32 Course – Mod4 Unit8, ESP32 Web Server – Display Sensor Readings

Gayland Monken asked 7 years ago

I have a fatal error on the first sketch and I can’t figure it out. I’ve gone over the sketch a few times and haven’t caught anything wrong but I still keep getting the same fatal error.
“A fatal error occurred: Failed to connect to ESP32: Invalid head of packet (‘.’)”
What is a packet and which is in question? The ESP32 is connected to the computer while compiling, of course.

1 Answers

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Rui Santos Staff answered 7 years ago

Hello Gayland,

Please take a look at this Unit: https://rntlab.com/esp32-troubleshooting-guide/

Section/heading number 4: “4. A fatal error occurred: “Failed to connect to ESP32: Timed out… Connecting…”” Holding down the BOOT button during upload will solve your problem.

Regards,
Rui