Mini does not appear on serial any more

(3 posts) (2 voices)

aliosha
Member

Hello together
I uploaded a sketch using the wrong board setting on my mini and now it is bricked. no way to get an ACM device any more. I am using ubuntu 32 bit. I can get it into perpetual bootloader mode but even then: no ttyACM appears. Do I have to re-burn the bootloader using a ftdi breakout. I have one but on which pins should I connect it?

Thanks for your help

Alexis

Posted 4 years ago #
aliosha
Member

Fixed it myself. just pressed reset after the message "searching for DFU device".

and then I could upload again. it blinks!

Posted 4 years ago #
poslathian
LeafLabs

glad its working. As a side note, the ttyACM/serial port will not appear if your code is corrupt or halted (mem fault or similar), you have disabled the USB interrupts, or you are pereptual bootloader mode.

Thankfully, reprogramming using the IDE (aka using dfu-util) should always work from perpetual bootloader mode, no serial port required.

The serial port is only used for user-side communication (SerialUSB.print) and to reset the board into bootloader mode for programming.

Posted 4 years ago #

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