[PD] Retrieving data directly into PD from HC-SR04 sensors connected to Arduino
Emin Durak
e10durak at gmail.com
Tue Apr 24 21:38:57 CEST 2012
Thanks Martin. Hmm, do you think it really matters Martin? I already only
get numbers from Arduino each sensor separately, which should just work
fine, right? I mean so long as I get them in a number box each at PD.
You have any idea how to change the byte rate to 9600 at PD?
On Tue, Apr 24, 2012 at 6:08 PM, <martin.peach at sympatico.ca> wrote:
> It would be easier if you sent only the integer value:
>
> #include <Ultrasonic.h>
> {
> Ultrasonic ultrasonic(10, 11 );
> long microsec = ultrasonic.timing();
> Serial.write(microsec, sizeof(long));
> delay(400);
> }
>
> And in Pd collect groups of four characters from [comport] and reassemble
> them into long integers...
> Easiest is to send only a single byte per sensor. But you'll also need a
> way to determine which is the first character in the packet.
>
> Martin
>
> ------------------------------
> From: e10durak at gmail.com
> Date: Tue, 24 Apr 2012 17:00:16 +0200
> To: pimassat at gmail.com
> CC: pd-list at iem.at
> Subject: Re: [PD] Retrieving data directly into PD from HC-SR04 sensors
> connected to Arduino
>
>
> Nop! Another sensor - HC-SR04 which uses 2 pins: *Echo and Trigger - *input
> and output. I use this code at Arduino to get it working. For each pin, I
> rewrite the same code only changing the (10, 11) at the third line. It
> gives me inch as distance:
>
> #include <Ultrasonic.h>
> {
> Ultrasonic ultrasonic(10, 11 );
> float inMsec;
> long microsec = ultrasonic.timing();
> inMsec = ultrasonic.convert(microsec, Ultrasonic::IN);
> Serial.println(inMsec);
> delay(400);
> }
>
> What do you think? Maybe we just try with one sensor and try to change the
> frequency of a song played at PD with it??
>
>
>
>
>
> On Tue, Apr 24, 2012 at 4:49 PM, Pierre Massat <pimassat at gmail.com> wrote:
>
> Are you using this code :
> http://www.arduino.cc/en/Tutorial/UltrasoundSensor
> ?
>
> Apparently Ultrasound sensors need to use a single pin as both input and
> output (to send a pulse and to receive the echo). Unfortunately i don't
> think Firmata can do that (it should be possible but I suspect there would
> be some latency when switching from input to ouput back and forth -
> somebody confirm this??).
>
> If you only need these 4 sensors, you can adapt the example code for
> ultrasound sensors to output the data, and read it using [comport] in Pd.
> This object is at the core of Pduino.
>
> (You shouldn't see anything in Pd console when using Pduino, except
> information about the current connection and the device.)
>
>
> 2012/4/24 Emin Durak <e10durak at gmail.com>
>
> Hej Pierre, thanks again.
>
> It works perfectly at Arduino Serial Monitor; all 4 sensors that are
> connected to.
>
> Should I only upload the firmata library and not write any code besides
> for the sensors you mean? I have uploaded the whole StandardFirmata.ino
> example file. But you mean only *firmata library* +* sensors library*(there is one) +
> *sensors code* will be sufficient?
>
> I would say let's simplify it. Let's have 4 different channels of music
> (sound files) w're playing. We wanna change the frequency of them *by the
> data gathered from 4 sensors. *Will need to put +5000 to the number we
> get for us to actually hear the frequency, but let's say. Or I'm fine to
> just "see" the analog data on PD as well. How would we do that? I send you
> the screenshots of how I adjusted PD... Ah, should I be seeing the numbers
> from sensors at the main PD window?? I get here this:
>
> [image: Inline image 1]
>
>
>
>
> On Tue, Apr 24, 2012 at 4:12 PM, Pierre Massat <pimassat at gmail.com> wrote:
>
> First you need to make sure the electronic part is working fine (using
> Arduino IDE's serial monitor).
> Then upload Firmata. If your sensors need no special library you should
> upload Firmata only.
> Then open arduino-test.pd with your board plugged in. The first thing you
> want to check in Pd is whether the right port is open. Choose a port, and
> click on the "Version" or "Firmware" messages to see if Pd recognizes the
> Arduino. If it does you should see a "Firmata something" below [pd device
> info]. If nothing appears, change the port and try again.
> Once you've made sure that the right port is open, use the pink matrix in
> the upper right corner to open the pins your sensors are connected to. The
> digital pins are from 2 to 13 if i'm not mistaken, the rest is analog.
> Check "input" to open a digital pin for input, and "analog" to open an
> analog pin for input.
>
> Pierre
>
>
> 2012/4/24 Emin Durak <e10durak at gmail.com>
>
> Hi Pierre,
>
> Thank you very much for your tips. Yes I have been trying but how would I
> configure the analog pins as analog inputs at Pduino? I'm trying with
> ultrasonic sensors to read data (which is not on/off). And have uploaded
> the StandardFirmata code besides my sensors reading code to Arduino. And
> testing on the arduino-test.pd sketch on PD. Ain't working :(
>
> Cheers...
>
>
>
> On Tue, Apr 24, 2012 at 9:22 AM, Pierre Massat <pimassat at gmail.com> wrote:
>
> Do you use a special library in Arduino to get data from your sensors? If
> not Firmata + Pduino should work just fine. Are you sure you opened the
> right port in Pduino? Did you configure the analog pins your sensors are
> connected to as analog inputs in Pduino?
> If you're not familiar at all with Pduino I suggest you try it with more
> simple stuff (like push buttons and pots).
>
> Cheers,
>
> Pierre.
>
> 2012/4/24 Emin Durak <e10durak at gmail.com>
>
> Hello!
>
> I'm sorry this email will be probably too amateur but I just couldn't
> figure out for days how to retrieve data into PD from the sensors I connect
> to Arduino (HC-SR04 ultrasonic sensors). I have no problem viewing them on
> Serial Monitor of Arduino software by some libraries I found online, though
> processing them at PD seems a bit tricky. I have tried SimpleMessageSystem,
> Firmata and Pduino but couldn't really have managed in neither of them.
>
> All I want to do is changing different parameters (frequency, loop-time,
> volume etc.) of playing sounds from an existing library (just a folder with
> songs/sounds), thus play them *accordingly *to the data I gather from
> sensors (10 of them). Plus making relevant changes throughout *time*.
> Idea is that people dancing on a dance floor can affect the sequence of
> electronic music played, in a collective and sensual way. Me being only a
> starter at PD, also, doesn't help much either; but gotta do it for my
> graduation. Technically I can't really "create" music like that in this
> short time and it's not my interest; BUT I feel like *modifying* existing
> music shouldn't be a big deal. No?
>
> Any suggestions? Highly appreciated! Thank you all!!
> Emin
>
>
>
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