LilyGo Atmega32u4 clear bootloader

Other Hardware 3rd Party Boards
1

Hello my problem to find a solution which I could not.

There is such a device:

1000×1000 43.6 KB

Inside it is Atmega32u4. I tested a virtual keyboard on Windows 10, everything worked as it should. I tried to insert LilyGO into another Windows 7 PC; there was a search for drivers that never came. I started looking for how to solve the problem, they advised me to remove Bootloader so that the sketch would start right away. I did this with the following method:

  1. In Arduino IDE clicked Sketch-> Export binary

  2. Through the program 32u4_hexUploader uploaded HEX which without bootloader

I tried the sketch, everything works fine. On Windows 7, it still writes the device was not found, but it works.

But now the problem is, I can’t upload a new sketch. I tried to fill in through 32u4_hexUploader HEX which with the bootloader but the program hangs. I tried through avrdude also freezes.

Tell me what can be done? Regarding arduino, I'm just a beginner, I understand. Only this device is available and I don’t want to disassemble it. Can I do something ?? I really need your help!

P.S. Sorry for my Eng

2

Without the bootloader, you cannot upload anything anymore.

My guess you would need to take apart the LilyGo and program the 32u4 with something like this Atmel AVR Programmers

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