I'm almost sure that the physical data transfer in the USB cable doesn't depend on the baudrate setting. This setting is just a parameter that the USB device can use the way it wants.
In the case the device implements a physical UART, then the setting controls the UART baudrate.
In other cases it can be used for smth else. For instance, the Raspberry pi Pico interprets a predefined baudrate value as a command to switch to bootloader.
Btw: what is your actual Arduino board?
---I'm not clear how this works. Because if I change the baud rate it definitely stops any communication between the laptop and the Arduino so baud rate must have some meaning in this case. I also tried using a python program I wrote and got the same behaviour of working up to 19200 then stopping so I don't think it's an issue with Pure Data. Maybe a cable issue?
Note that Arduino is usually (or always?) connected through an USB device
which emulates a serial device (hence the comport).
In this case the baud rate has no meaning (the baud rate is only used by
physical UARTs).
Le jeu. 26 juin 2025 à 00:06, Antoine Rousseau <antoine@metalu.net> a
écrit :
> With the latest comport 1.3 (available on Deken) you can set the baud
> rate up to 4000000, if your system allows it. See
> https://git.iem.at/pd/comport
>
> Le mer. 25 juin 2025 à 22:53, Alexandros Drymonitis <adrcki@gmail.com> a
> écrit :
>
>> How did you find such a limitation? You can use it with a 115,200 baud
>> rate just fine on any OS (including Linux).
>>
>> On 6/25/25 23:50, Jim Ruxton wrote:
>> > I'm using the comport object to speak to an Arduino. I'm finding the
>> > fastest baud rate I could use was 19200. I'm on Linux. Would anyone
>> > know if this is a limitation of the object in Linux or if there is
>> > something else going on. I'd like to send data faster if possible.
>> >
>> > ---
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