On Mon, 8 Sep 2008, Adityo Pratomo wrote:

Hi there everyone. Lately i've been working with an arduino board loaded with the firmata firmware and then i use the [arduino] object to read the input from the sensor that connected to the board's input port. For the firmware, i choose to upload the simple_digital_firmata code from the Library-Firmata example. And everything just went well. After some examination, i made an assumption that this code is actually doing the almost same thing done by the [arduino] object.

So my questions are is my my assumption true? if so, is the firmata code is used by the arduino board so that it can communicate with the computer, and the [arduino] object will maps those I/Os from the board to the pd?

That is correct.

Actually what does the [arduino] object does when it's started up for the first time?

Nothing really, until you send an "open" message. The [arduino] object just handles communications with Firmata on the Arduino.

The last question is Why can't i get the [arduino] board to respond when i upload the standard_firmata code?

My guess is that you did not enable the digital/analog input reporting. With the simple examples, the data is always sent from the Arduino. With StandardFirmata, you can turn the sending of data on and off, so that you only get the data that you want. Check out the right side of arduino-test.pd to see what I am talking about.

.hc

Thank you so much every body, sorry for the long questions, i'm so curious here :)

zen
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