Serial library with Processing.py

ericksonla

Generally, is there library documentation for the libraries with Processing.py?

Specifically, I'm trying to use the Serial library. Guessing the syntax from the Java documentation, I have:

add_library('serial')

def setup():
    #setup the serial port
    print Serial.list()
    portIndex = 4
    LF = 10
    print "Connecting to ", Serial.list()[portIndex]
    myPort = Serial(Serial.list()[portIndex], 9600)   # this seems to need a first argument referring to the sketch object (analagous to "this" argument in Java)
    myPort.bufferUntil(LF)
    
def draw():
    pass
    
def serialEvent(evt):
    inString = evt.readString()
    print inString

Anyone have any advice on making this work?

As a side note, it would be nice to add a processing.py as a subcategory in the forums under "Questions and Modes".

GoToLoop

http://forum.processing.org/two/discussion/8045/how-to-format-code-and-text

resman

You just need to add this to the argument list, as in:

    portName = Serial.list()[len(Serial.list()) - 1] # Pick last serial port in list
    myPort = Serial(this, portName, 57600)

Although this gets you past the your first error, I am encountering the following error:

processing.app.SketchException: java.lang.UnsatisfiedLinkError: jssc.SerialNativeInterface.openPort(Ljava/lang/String;Z)J
    at jssc.SerialNativeInterface.openPort(Native Method)
    at jssc.SerialPort.openPort(SerialPort.java:158)
        ...

once it runs. Running the example 'SimpleRead' opens the serial port just fine. I wish I knew what I was doing wrong.

ericksonla

Thanks, I added "this" to the arguments list.

I also get the same error and its a great mystery to me too.

resman

This was a bug under OSX and has jut been fixed: https://github.com/jdf/Processing.py-Bugs/issues/124

Open processing, go to the modes dropdown, click install new mode, then remove Python. Quit, restart, reload Python mode. Quit, restart, and you're good to go with the fix.

villares

Just for the record... Firmata is working great on Processing Python Mode, you can find an example here: https://github.com/jdf/processing.py/tree/master/mode/examples/Contributed Libraries in Python/Arduino-Firmata