Marc Villanueva Mir

I am working on a project involving 3 Arduino Leonardo boards that send and receive MIDI data to and from Max MSP over USB. The issue I am struggling with now is that the three boards keep appearing in the list of available MIDI inports (using midiinfo) just as "Arduino Leonardo". That makes it hard to route them or to set the ports with a message when the patch is loaded. Although I renamed them at the Arduino level so they appear as Arduino Leonardo #1, Arduino Leonardo #2 and Arduino Leonardo #3 (see the discussion in the Arduino forum 

), they still appear as "Arduino Leonardo" in Max MSP. I guess that Max is looking for the port name somewhere else, but I don't know where, or whether it is possible to rename the serial ports from within Max itself. I would appreciate any hint!

I am working on a project involving 3 Arduino Leonardo boards that send and receive MIDI data to and from Max MSP over USB. The issue I am struggling with now is that the three boards keep appearing in the list of available MIDI inports (using midiinfo) just as "Arduino Leonardo". That makes it hard to route them or to set the ports with a message when the patch is loaded. Although I renamed them at the Arduino level so they appear as Arduino Leonardo #1, Arduino Leonardo #2 and Arduino Leonardo #3 (see the discussion in the Arduino forum here), they still appear as "Arduino Leonardo" in Max MSP. I guess that Max is looking for the port name somewhere else, but I don't know where, or whether it is possible to rename the serial ports from within Max itself. I would appreciate any hint!

I am working on a project involving 3 Arduino Leonardo boards that send and receive MIDI data to and from Max MSP over USB. The issue I am s

rename-serial-ports-using-arduino

You need to either modify boards.txt file 3 times

before uploading to leonardo, or make own hardware definitions

The key is this part : (it might look a bit different, depending on IDE version used)

Screen shot 2019-12-31 at 13.22.52.png

As first You would quit Arduino IDE, compress original

boards.txt for backup, make first change and upload

Quit Arduino , modify boards.txt again, upload etc.

The vendor and product IDs are not for selling, but for own use who cares.

The second option involves making own boards.txt,

copying bootloaders, descriptors etc to arduino user library path.

This worked fine for me , renaming 4 leonardo boards which were used as HID

Maybe midi needs something more than just vendor and product ID changed.

You need to either modify boards.txt file 3 times
before uploading to leonardo, or make own hardware definitions
in user lib/hardware folder.
The key is this part : (it might look a bit different, depending on IDE version used)


Original :
leonardo.build.vid=0x2341
leonardo.build.pid=0x8036
leonardo.build.usb_product="Arduino Leonardo"
change for example to :
leonardo.build.vid=0x2342
leonardo.build.pid=0x8037
leonardo.build.usb_product="Leo-Midi-1"
----------
leonardo.build.vid=0x2343
leonardo.build.pid=0x8038
leonardo.build.usb_product="Leo-Midi-2"
----------
leonardo.build.vid=0x2344
leonardo.build.pid=0x8039
leonardo.build.usb_product="Leo-Midi-3"

------------
or something similar.
As first You would quit Arduino IDE, compress original
boards.txt for backup, make first change and upload
the code to first Leonardo.
Quit Arduino , modify boards.txt again, upload etc.
------
The vendor and product IDs are not for selling, but for own use who cares.
-------------
The second option involves making own boards.txt,
copying bootloaders, descriptors etc to arduino user library path.
-------
This worked fine for me , renaming 4 leonardo boards which were used as HID
joystick .
What OS are You using ?
Maybe midi needs something more than just vendor and product ID changed.


Thank you for your suggestions! I will go through them on the weekend and let you know what happened. I am using OS 10.15.2 (Catalina).

Last time I did so was on el capitan 10.11.6

Not sure if that can work on Catalina, but an idea would be to go to audiomidi setup

utility and delete allready created leonardo midi devices.

Not sure if that can work on Catalina, but an idea would be to go to audiomidi setup
utility and delete allready created leonardo midi devices.


P.S. I remember modifying also descriptors file

and USB headers, but that changed definitely

in Arduino version that runs on Catalina.

Maybe You could send me infos on midi library You used for the leonardo boards.

P.S.  I remember modifying also descriptors file
and USB headers, but that changed definitely
in Arduino version that runs on Catalina.
Maybe You could send me infos on midi library You used for the leonardo boards.
I could compare that to what worked here


Leo-Midi.zip

Put it into Arduino user library/Hardware.

I've just tested it using last Arduino IDE

The boards get reported separately in MidiSetup.

I could not test it on Catalina, but on Capitan all is ok.

Put it into Arduino user library/Hardware.
You will get 3 new boards in the menu :
Leo-Midi-1, Leo-Midi-2 and Leo-Midi-3
I've just tested it using last Arduino IDE
and Midi Library.
The boards get reported separately in MidiSetup.
I could not test it on Catalina, but on Capitan all is ok.

Thanks for compiling that. I get the following error though: "Invalid library found in /Users/marc/Documents/Arduino/libraries/Hardware: no headers files (.h) found in /Users/marc/Documents/Arduino/libraries/Hardware"

On the other hand I renamed the boards using the Audio MIDI setup utility and it looks that this is what Max was reading after all, because after modifying there the device names to be called "Leonardo 1", "Leonardo 2" and "Leonardo 3" they now appear in Max as "Leonardo 1 Arduino Leonardo", "Leonardo 2 Arduino Leonardo" and so on. I don't get why "Arduino Leonardo" keeps appearing but that isn't so terrible. Happy New Year to you too!

Thanks for compiling that. I get the following error though: "Invalid library found in /Users/marc/Documents/Arduino/libraries/Hardware: no headers files (.h) found in /Users/marc/Documents/Arduino/libraries/Hardware"
On the other hand I renamed the boards using the Audio MIDI setup utility and it looks that this is what Max was reading after all, because after modifying there the device names to be called "Leonardo 1", "Leonardo 2" and "Leonardo 3" they now appear in Max as "Leonardo 1 Arduino Leonardo", "Leonardo 2 Arduino Leonardo" and so on. I don't get why "Arduino Leonardo" keeps appearing but that isn't so terrible. Happy New Year to you too!

into users Documents/Arduino/Hardware and was able to

uplaoad using latest 1.8.10 IDE on el Captan.

One could maybe copy variants/Leonardo folder too.

variants.zip

Screen shot 2020-01-05 at 09.32.36.png

In case that still does not work, one could

I don't know what is missing.
Maybe something to do with Catalina ?
I have just placed the folder avr
into users Documents/Arduino/Hardware and was able to
uplaoad using latest 1.8.10 IDE on el Captan.
One could maybe copy variants/Leonardo folder too.


In case that still does not work, one could
copy more stuff from IDE


P.S. the main reason for having different names

is that midi setup assigns own #1 #2 etc to indentical midi interfaces

depending on order and USB port they get plugged in, so it is not

sure what gets send to which real interface.

P.S. the main reason for having different names
is that midi setup assigns own  #1 #2 etc to indentical midi interfaces
depending on order and USB port they get plugged in, so it is not
sure what gets send to which real interface.
At least that used to be so


I followed your instructions and now it works perfectly! In my first attempt I copied the Hardware folder into Arduino/Libraries, that was the problem. Thank you so much!

Great, You can peak in Descriptors.c file to see what
has been changed, for future.


I made that modification on "C:\Program Files (x86)\Arduino\hardware\arduino\avr\boards.txt" and did not work.

Hi, is it just works on Apple? 
I made that modification on "C:\Program Files (x86)\Arduino\hardware\arduino\avr\boards.txt" and did not work.

I made the modification on "C:\Program Files (x86)\Arduino\hardware\arduino\avr\boards.txt" and did not work.

Is it just works on Apple?
I made the modification on "C:\Program Files (x86)\Arduino\hardware\arduino\avr\boards.txt" and did not work.

user Documents folder on mac is similar to user Documents folder on win.

C:\Program Files (x86)\Arduino\ etc is definitely not user folder

user Documents folder on mac is similar to user Documents folder on win.
just look fo the right place.
C:\Program Files (x86)\Arduino\ etc is definitely not user folder


Tks Source Audio. I found the correct path:

C:\Users\{user_name}\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.3.

Tks Source Audio. I found the correct path:
C:\Users\{user_name}\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.3.

Rename serial ports using Arduino