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

Q&A Forum › Category: ESP32 › A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

uengel asked 3 years ago

Hi there,
I use an ESP32-CAM-MB.
Unfortunately, I cannot upload a program to this board. I've also held down the IO0 button while uploading. No success.
Many greetings

8 Answers

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Sara Santos Staff answered 3 years ago

Hi.
The ESP32-CAM that you’re using… Did it come with the MB programmer?
Or is it another ESP32-CAM that you had?
Regard,
Sara

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uengel answered 3 years ago

ESP32-CAM-MB    with MB programmer

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Sara Santos Staff answered 3 years ago

Did you try uploading the code without pressing the button?

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uengel answered 3 years ago

I try both and I also try using a FTDI board with bridge gnd – IO0

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William Lucid answered 3 years ago

Are you using a USB Data cable; not all USB cables are data cables, some are charging only. Have experienced some Arduino IDE 2.0, serial connection issues; resolved by unpluging USB from computer, then plugging USB cable back into computer.

Once the USB data cable is plugged back into computer; check Serial port configuration, make sure the port is correct. When USB data cable is unplugged, port setting reverts to serial port one or not selected at all.

William

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uengel answered 3 years ago

I use a USB Data cable. No Problem with Nano.
Arduino IDE 1.8.15

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Sara Santos Staff answered 3 years ago

Hi.
Try the following that worked for one of our readers:
“Pressing/holding IO0 and then pressing RST on the cam board was the way to go.”
You may also want to take a look at the comments at the following article, where people discuss about different ways to get it working: https://randomnerdtutorials.com/upload-code-esp32-cam-mb-usb/
Regards,
Sara

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uengel answered 3 years ago

Thanks for help.