for the MD5 of file that does not match data in flash,

here is the complete command line . Just in case it could help.

C:\Users\User\Documents\Arduino\hardware\espressif\esp32/tools/esptool.exe
--chip esp32
--port COM10
--baud 921600
--before default_reset
--after hard_reset write_flash -z ...

Hello,

Thanks a lot for your answer .

Yes the boards were working when pluged it for the first time ( there is always a little demo in the screen ) .
Then i was able to upload the code .

Here is the exact board that i have : http://www.instructables.com/id/ESP32-With-Integrated-OLED-WEMOSLolin ...

Hello everyone,

i get this error when trying to upload my sketch : A fatal error occurred: MD5 of file does not match data in flash!

here is the complete log :

esptool.py v2.1
Connecting........_
Chip is ESP32D0WDQ6 (revision 0)
Uploading stub...
Running stub...
Stub running...
Changing baud ...