Maybe you can try to send something to the serial line, from Arduino, whenever you send something to it, to see if it does receive the bytes you send.

On Wed, Sep 2, 2015 at 7:47 PM, <rolfm@dds.nl> wrote:

hi list,
i'm using PD as a GUI for an Arduino, controlling a number of motors, (not with Pduino).
it's difficult to debug the Arduino sketch,
but it seems that sometimes there are errors/problems in the communication.

is there a quarantee that bytes sent, are always received on the other side,
[comport] to Arduino & vice versa?

rolf

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