[maemo-developers] Connecting RS232 devices to N800 hosting OS2008

[From: James Kemp]

Nope, running as root does not help. Seems like the script gets stuck on the
write to the port. The ser.write(s) never returns.

Thanks for the tip anyway.

Jim

On Jan 31, 2008 1:33 AM, Ryan Pavlik <abiryan at ryand.net> wrote:

> Have you checked the permissions on the device file to ensure that your
> user ("user") has write permissions (and/or tried running this as root?)
>
> Ryan
>
> James Kemp wrote:
> > I'm using a N810, but the problem of connecting a RS232 device is
> > probably the same.
> >
> > I'm getting close to getting a RS232 connection working using
> > Bluetooth and Python2.5. The code below is getting me close. I can
> > receive RS232 string over Bluetooth using this code. I just can't seem
> > to figure out how to send string out. If I try and use PySerial
> > package I get an error when trying to open the port.
> >
> > #! /usr/bin/env python2.5
> > import dbus
> > import time
> > import sys
> > import thread
> > #import serial
> >
> > PortOpen = 0
> > ser = ""
> >
> > #
> >
> =============================================================================
> > def OpenPort ( COM_Port ):
> >     global ser, PortOpen
> >     try:
> >     print "Opening %s port" % COM_Port
> >     #ser = serial.Serial( COM_Port, 115200, timeout=0,
> > parity=serial.PARITY_NONE, rtscts=0)
> >         ser = open( COM_Port, 'r+' )
> >         PortOpen = 1
> >     except:
> >         print "Error opening serial port."
> >         exit()
> >
> >
> > #
> >
> =============================================================================
> > def CommThread ( tid ):
> >     """ This function is designed to be run as a thread task. """
> >     global gTID, PortOpen
> >     gTID = tid
> >     i = 0
> >     while PortOpen:
> >         s = ser.readline( ).strip( '\r\n' )
> >         print s
> >     print "CommThread Ending %d" % PortOpen
> >
> > bus = dbus.SystemBus()
> > bmgr = dbus.Interface( bus.get_object('org.bluez', '/org/bluez'),
> > 'org.bluez.Manager')
> > bus_id = bmgr.ActivateService('serial')
> > serial = dbus.Interface(bus.get_object( bus_id, '/org/bluez/serial'),
> > 'org.bluez.serial.Manager')
> >
> > # Service connection, read the serial API to check the available
> patterns
> > address = "00:01:95:06:CF:88"
> > service = "spp"
> >
> > # Bind to the default local adapter
> > device = serial.ConnectService( address, service )
> > print "Connected %s to %s" % (device, address)
> >
> > time.sleep(1)
> > OpenPort( device )
> > thread.start_new( CommThread, (1234,) )
> >
> > print "Press CTRL-C to disconnect"
> >
> > while(1):
> >     s = raw_input()
> >     print "Writting %s" % s
> >     ser.write(s)
> >     ser.flush()
> >
> > serial.DisconnectService(device)
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > maemo-developers mailing list
> > maemo-developers at maemo.org
> > https://lists.maemo.org/mailman/listinfo/maemo-developers
> >
>
>
>


-- 
Allied Transportation Technology, Inc.
Jim Kemp
1465 Combermere Dr.
Troy, MI 48083
Ph: (248) 616-2100 Ext: 28
Cell: (248) 930-7709
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