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Re: how to read serial stream of data [newbie]

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From	Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject	Re: how to read serial stream of data [newbie]
Date	Tue, 07 Feb 2012 12:44:36 -0500
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On Tue, 7 Feb 2012 04:13:39 -0800 (PST), Jean Dupont
<jeandupont115@gmail.com> wrote:


>filename = raw_input()
	Note: this may include the terminating new-line character; you
should strip leading/ending white-space characters.

	filename = raw_input().strip()

>ser2 = serial.Serial(voltport, 2400, 8, serial.PARITY_NONE, 1,
>rtscts=0, dsrdtr=0, timeout=15)
	Note: this specifying NO FLOW CONTROL (your PERL example is
activating DTR, which could be both enabling DSRDTR control, AND setting
the DTR line high). Finally, you are specifying a 15 SECOND timeout.

>ser2.setDTR(level=True)
	Note: here you are setting the DTR level high -- but you previously
opened the port without enabling the use of DSRDTR. Use
			...,	dsrdtr=True, ...
in the serial port creation.

>print "Opening " + ser2.portstr

	ser2.name		is the preferred usage; and you opened it with the
serial.Serial() call. And for such debug output, no need for a string
concatenation

	print "Reading", ser2.name

>s =ser2.read(11) #read up to 11bytes

	print len(s), repr(s)

-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
        wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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Thread

how to read serial stream of data [newbie] Jean Dupont <jeandupont115@gmail.com> - 2012-02-06 13:40 -0800
  Re: how to read serial stream of data [newbie] Roy Smith <roy@panix.com> - 2012-02-07 00:07 -0500
    Re: how to read serial stream of data [newbie] Jean Dupont <jeandupont115@gmail.com> - 2012-02-07 04:13 -0800
      Re: how to read serial stream of data [newbie] Antti J Ylikoski <antti.ylikoski@tkk.fi> - 2012-02-07 15:48 +0200
        Re: how to read serial stream of data [newbie] Peter Otten <__peter__@web.de> - 2012-02-07 15:02 +0100
          Re: how to read serial stream of data [newbie] Antti J Ylikoski <antti.ylikoski@tkk.fi> - 2012-02-07 19:44 +0200
        Re: how to read serial stream of data [newbie] Heiko Wundram <modelnine@modelnine.org> - 2012-02-07 15:04 +0100
          Re: how to read serial stream of data [newbie] Jean Dupont <jeandupont115@gmail.com> - 2012-02-07 06:46 -0800
      Re: how to read serial stream of data [newbie] Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-02-07 12:44 -0500

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