Hey,

I'm doing some basic testing using python to send values to pd using the pdsend and [netreceive]. I'm doing all this inside my Raspberry Pi, with the hope of expanding on this to use the GPIO with some sensors to control a Pd patch.

So, I've made a basic python patch: send2Pd_test.py that sends some dummy values to this pd patch: Netreceive_Test.pd

The values are received when I do this. But I get a "EOF on socket ##" message in the Pd Terminal window along with my printed values from netreceive.

This is my first time using [netreceive]. I'm just wondering if this is normal behaviour or if it's something that I should try and fix before continuing further. I also would like to know what it is I need to fix because everything seems pretty standard from what I've done so far.

I think this is normal behavior, but again I might be wrong. Why not send OSC messages to Pd, since vanilla supports OSC since 0.46?

@alexandros thanks for the input. I was thinking about doing OSC but it seemed like a "6 of one, half a dozen of the other" sort of situation. I haven't used OSC much in Pd either, so I've found it hard to weigh up the pros and cons of using one or the other. If you have any input, I would be happy to hear.

Well, in Pd all you have to do is this:

and in Python, probably something like this:

import OSC

send_address = '127.0.0.1', 9001
c = OSC.OSCClient()
c.connect(send_address)
oscmsg = OSC.OSCMessage()
oscmsg.setAddress("/yourOSCaddress")
# place one character so that the OSC list is populated
# then we can just replace that character
oscmsg.append(0)
# your data receiving function here
oscmsg[0] = yourvalue
c.send(oscmsg)

Yes, EOF means "End Of File" so it is the Puredata console telling you that the communication is over.

What happens at my end is that [netreceive] opens up a new connection every time it receives data. This is terrible, because eventually all the open connections will open up all the computer power and the computer will freeze.

Did you run in to this problem? How did you solve it?

@notna999 [netreceive] just listens...... it is not creating new sockets unless you are sending a [listen( message into it..
Hard to say without seeing your python code but pretty sure the error must be there.. A Python ipV4 socket throws the socket away once the data is requested and sent I think.
I am not a Python programmer so that is not gospel. If you use a server.socket then it should keep the connection open.
EOF means that Pd has received the data...... and that it is terminated with a semi-colon.
There is an executable built into Pd for sending to [netsend] from other programs...... pdsend.
An example here...... https://guitarextended.wordpress.com/2012/11/03/make-python-and-pure-data-communicate-on-the-raspberry-pi/
David.