Dan for the win! Thanks Dan it was indeed a problem with the Baud variable being declared an int in the Arduino sketch. It would have been nice to get a compiler warning in this case for a dummy like me.
To double-check, are you sure the problem is not in the Arduino sketch? > Python exhibiting the same behavior tips to that IMO. A quick search yields > a similar issue due to using an int for larger baud values: > > > https://arduino.stackexchange.com/questions/67568/serial-port-fails-with-speeds-greater-than-19200 > > > On Jun 27, 2025, at 2:51 AM, Jim Ruxton <jim.rux...@gmail.com> wrote: > > > > > > 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 <anto...@metalu.net > <mailto:anto...@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 <adr...@gmail.com > <mailto:adr...@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. > > >
--- pd-list@lists.iem.at - the Pure Data mailinglist https://lists.iem.at/hyperkitty/list/pd-list@lists.iem.at/message/X32PECEOOKX2IWVG5B6PJADEGYL5JJVO/ To unsubscribe send an email to pd-list-le...@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.iem.at/
