Failed to connect to ESP32: Invalid head of packet ('w')

[chinmoyrick]

Hi
after fallowing all step of esp 32 windows installation i got this type error !

`Build options changed, rebuilding all
Sketch uses 108230 bytes (8%) of program storage space. Maximum is 1310720 bytes.
Global variables use 9552 bytes (3%) of dynamic memory, leaving 285360 bytes for local variables. Maximum is 294912 bytes.
esptool.py v2.0-beta3
Connecting.....................................................

A fatal error occurred: Failed to connect to ESP32: Invalid head of packet ('w')
A fatal error occurred: Failed to connect to ESP32: Invalid head of packet ('w')

`
plz help

[bestpika]

May be you can use esptool to erase flash.

python esptool --port com1 erase_flash

[chinmoyrick]

sir i don't understand . i have little information about esp 32 . its only esp 32 chip , i connect usb to ttl connector . and fallow all step of esp32 arduino windows installation . and i open serial monitor 115200 bd and its print board information .

i still unable upload any code ..
plz help me how to flash . i am using windows computer.

[copercini]

@chinmoyrick After it appers "Connecting.........." try press boot the button of your board for few seconds or connect the pin 0 to the ground.

[chinmoyrick]

@copercini it's nor working now it show new error
A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

[copercini]

Got same issue with a new board and a cheap USB cable, changing the cable, everything works fine

[lonerzzz]

@chinmoyrick Is there any update to this issue? Did you work through it? Can we close it?

[greanthai420]

on DOIT esp32 devkit1 i also have this issue, messing around with BOOT and EN buttons doesn't do anything.

A fatal error occurred: Failed to connect to ESP32: Invalid head of packet ('x') <---- the x is random. changes everytime i try to upload

[me-no-dev]

check and maybe resolder all pads from the module to the board. I have seen reports of bad reflow jobs

[everslick]

This issue is closed, because it looks as if it is not a bug or problem with the ESP32 Arduino core or its support libraries. For general API usage questions or help on specific coding challenges, please visit the arduino-esp32 Gitter channel. If you feel this issue was closed in error, reopen it and comment, why you think this is a bug in the Arduino-Core.

[sharatkanthi]

Press the "Boot" button on your ESP, Start uploading your code from Arduino IDE and keep "Boot" pressed till upload completes.

[roysinurat]

i press boot button but still error.. or boot+ eneble.

a fatal error occured: failed to connect to esp32: invalid head of packet (0x00)

please help me..

i tray upload with atom with PlatformIO but message is same..

my board is new.
DOIT ESP32 DEVKIT V1 (ESPRESSIF ESP32 -WROOM32)

please

[sschepis]

ya I have this problem too, @everslick maybe if you're going to close an issue maybe give a link to something that isn't a chat room (data permanence and all that...) . I will try erase_flash as per @bestpika 's suggestion

[kebner]

Hi
I stumbled upon that same issue and found that at least some GPIO pins are causing this. For me, I had a one wire temp sensor on GPIO2 with a 4.7K pullup. No way to upload until I unpluged that one first.

[beegee-tokyo]

Reserved GPIO’S