[PD] Fwd: Re: sending lists via [comport]

Christof Ressi info at christofressi.com
Sat Feb 1 01:11:35 CET 2020


Hi,

> How do I get Arduino to send the complete values as integers instead?
> And, how can I tell [pd] when a new data set of e.g. six values begins?
Short answer: you need a protocol. Someone already mentioned SLIP. For 
Pd there is an external called [mrpeach/slipenc] resp. [mrpeach/slipdec] 
and for Arduino there are libraries like 
https://github.com/bakercp/PacketSerial or https://github.com/CNMAT/OSC 
(see SLIPEncodedSerial.h).

Please read the following to understand the problem which SLIP and 
similar protocols are trying to solve: 
https://github.com/bakercp/PacketSerial/blob/master/docs/BACKGROUND.md

It doesn't have to be SLIP, though. You can use any encoding/protocol 
you like as long as both sides agree :-) I've even (ab)used MIDI because 
it is quite compact and rather easy to parse.

Christof


On 31.01.2020 23:18, Dr. Maik Hester wrote:
>
>
>
>
> -------- Weitergeleitete Nachricht --------
> Betreff: 	Re: [PD] sending lists via [comport]
> Datum: 	Fri, 31 Jan 2020 22:34:24 +0100
> Von: 	Dr. Maik Hester <maik.hester at gmx.de>
> An: 	hans w. koch <hansw.koch at gmail.com>
> Kopie (CC): 	pd-list at lists.iem.at <pd-list at mail.iem.at>
>
>
>
> Dear list,
>
> the logic in the attached patch works fine, but I am still stuck at 
> two different points:
>
> The Arduino sends each digit of the values as a two-digit ascii. How 
> do I get Arduino to send the complete values as integers instead?
>
> And, how can I tell [pd] when a new data set of e.g. six values begins?
>
> Thanks
> Maik
>
>
> Am 29.01.20 um 00:00 schrieb hans w. koch:
>> if the incoming data all have the same structure (i.e. the strings of numbers have the same lenght),
>> you could group them in lists and then use unpack to sort their destinations.
>> like in the patch attached
>>
>> hth
>> hans
>>
>>
>>> Am 28.01.2020 um 23:25 schrieb Dr. Maik Hester<maik.hester at gmx.de>:
>>>
>>> Dear list,
>>>
>>> does anyone know how to send the different values of each line from the
>>> sample below to [comport] as a list, strip this list in [pd] and route
>>> the values to their different destinations?
>>>
>>> The data comes via Arduino from a pixy cam.
>>>
>>> Here is a sample from Arduino's serial monitor:
>>>
>>> Detected 6
>>>    block 0: sig: 2 x: 273 y: 36 width: 42 height: 5 index: 41 age: 18
>>>    block 1: sig: 1 x: 272 y: 187 width: 36 height: 4 index: 37 age: 18
>>>    block 2: sig: 1 x: 266 y: 151 width: 28 height: 4 index: 226 age: 71
>>>    block 3: sig: 1 x: 274 y: 109 width: 20 height: 4 index: 155 age: 124
>>>    block 4: sig: 2 x: 280 y: 48 width: 32 height: 2 index: 223 age: 72
>>>    block 5: sig: 1 x: 240 y: 136 width: 24 height: 2 index: 52 age: 5
>>>
>>> At the moment [comport] receives all the numbers one after another (e.g.
>>> 2  273  36  42  5  41  18 ...), so that it is impossible for me to tell
>>> [pd] which number should go where.
>>>
>>> I kept checking the internet for a solution for several days which did
>>> not bring me any further, so I hope that someone in the [pd] community
>>> could give me a clou.
>>>
>>> Thanks
>>> Maik
>>>
>>>
>>>
>>>
>>> --
>>> __
>>> Dr. Maik Hester
>>> Musiker, Musikwissenschaftler, Akkordeon-Restaurator
>>> Himmelohstra├če 23
>>> D-58454 Witten
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Pd-list at lists.iem.at  mailing list
>>> UNSUBSCRIBE and account-management ->https://lists.puredata.info/listinfo/pd-list
> --
> __
> Dr. Maik Hester
> Musiker, Musikwissenschaftler, Akkordeon-Restaurator
> Himmelohstra├če 23
> D-58454 Witten
>
> _______________________________________________
> Pd-list at lists.iem.at mailing list
> UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
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