[PD] digital write problem in Pduino

Charles Henry czhenry at gmail.com
Wed Oct 8 16:55:43 CEST 2008

On Wed, Oct 8, 2008 at 9:38 AM, Derek Holzer <derek at umatic.nl> wrote:
> The blink interval is something in the area of 200-500 miliseconds,
> certainly slow enough for the comport. Could it be trouble with some of
> the objects in the [arduino] abstraction?

Hi, Derek,

One thought that occurred to me: it takes around 16-20 ms to send a
message to the arduino and recieve a message back (which has to do
with the FTDI chip).  This is a round-trip time--I'm not sure what the
delay time is like for data traffic going in one way.  Perhaps those
delays are adding up, when you've got 10 separate LEDs to control?

Have you considered making a test program on the arduino to blink the
LEDs at different rates and see if the problem persists?  That would
isolate the communications from the actions performed.


> Any and all suggestions appreciated, as this project needs to go out the
> door tomorrow morning!
> best,
> Derek
> --
> derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
> ---Oblique Strategy # 95:
> "Is something missing?"
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