support to ATmega328P (Old Bootloader)

[amamory]

Bug Report

I tried to upload the blink example to an Arduino Mega and it worked. However, when I tried to do the same with Arduino nano, the upload wont work with arduino-cli. This upload works when using arduino IDE because I can set the type of bootloader with Tools > Processor > ATmega328P (Old Bootloader). As far as I know, this is not possible with arduino-cli.

Current behavior

./arduino-cli upload -v -p /dev/ttyUSB0 -b arduino:avr:nano MyFirstSketch/

avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

     System wide configuration file is "/home/lsa/.arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/etc/avrdude.conf"
     User configuration file is "/home/lsa/.avrduderc"
     User configuration file does not exist or is not a regular file, skipping

     Using Port                    : /dev/ttyUSB0
     Using Programmer              : arduino
     Overriding Baud Rate          : 115200

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00

Expected behavior

It seems that arduino-cli only uploads with baud rate 115200, but the Nano requires 57600 bps.

Environment

• CLI version (output of arduino-cli version):
  arduino-cli: arduino-cli Version: 0.7.1 Commit: 7668c46
  arduino version: arduino-1.8.10
• OS and platform: Ubuntu 18.04

[per1234]

It's already supported, you just need to specify the cpu option atmega328old in the FQBN:

./arduino-cli upload -v -p /dev/ttyUSB0 -b arduino:avr:nano:cpu=atmega328old MyFirstSketch/

More information: #138

[ericonr]

This should be documented more clearly somewhere, though. I only found out about it because I managed to find this issue.

[rustbuckett]

Agreed. I've been at this for 3 hours. I can finally go to bed.