Dear all,

I'm trying to upload a simple arduino sketch to my mks gen L V2 board. When the compiling is done I get an error after a while. I do not know what is causing this issue. I have checked a few things:
- correct cable
- update CH340 drivers
- correct COM port (it disappears after unplugging)
- Arduino Mega board and processor selected
- hold reset button when uploading or pressing it once

Are there other things that could cause this error?
Greetings, Robin

There should be no need to use the reset button.

The CH340 DTR line is connected to avr reset, avrdude knows to assert this line to reset the controller to start upload.

This can bee seen on the last page of the circuit diagram [github.com]


You either have a hardware fault or the boot loader has been damaged,

Install stock atmega2560 boot loader, using a avrisp. see [sparkfuneducation.com] as one example on how to do this.

Edited 1 time(s). Last edit at 11/26/2024 05:51PM by Dust.