Baud rate forced to 115200

[Prior99]

When trying to flash my Arduino Nano using this CLI, the CLI forces the Baud rate to 115200.

I invoked the CLI like this:

arduino-cli --debug upload -b arduino:avr:nano:cpu=atmega328 -p /dev/ttyUSB0 -t -v .

With this high Baud rate, the board can't get in sync with the CLI.

Using ps auxw, I was able to determine how arduino-cli calls avrdude:

/home/prior/.arduino15/packages/arduino/tools/avrdude/6.3.0-arduino9/bin/avrdude -C/home/prior/.arduino15/packages/arduino/tools/avrdude/6.3.0-arduino9/etc/avrdude.conf -v -patmega328p -carduino -P/dev/ttyUSB0 -b115200 -D -Uflash:w:./..arduino.avr.nano.cpu=atmega328.hex:i

Even when overriding the Baud rate in ~/.avrduderc, this has no effect.

I can successfully flash my Arduino Nano like this:

avrdude -v -patmega328p -carduino -P/dev/ttyUSB0 -b57600 -D -Uflash:w:..arduino.avr.nano.cpu=atmega328.hex:i

Could you remove the -b115200 from the commandline when invoking avrdude?
The Arduino IDE also doesn't pass that flag:

I suggest to spare the flag (as the default configuration file for avrdude already specifies the correct Baud rate).

[per1234]

The avrdude configuration file is not going to have the communication speed of the bootloader on your board.

You simply need to use the correct FQBN for your old or clone Nano:

arduino:avr:nano:cpu=atmega328old

The FQBN you're using is for the new official Nanos, which have a bootloader that communicates at 115200.

[Prior99]

Thank you for your quick response.
I will try this later and close the issue.