[PD] Retrieving data directly into PD from HC-SR04 sensors connected to Arduino

[Emin Durak]

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
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Pd-list at iem.at mailing list
>>>>>> UNSUBSCRIBE and account-management ->
>>>>>> http://lists.puredata.info/listinfo/pd-list
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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