[Tutor] how to read over serial port

[shawn bright]

Hey all, sorry, but am i supposed to be using 'rb' to read this?
thanks

sk

On Sun, Nov 2, 2008 at 11:50 AM, shawn bright <nephish at gmail.com> wrote:
> Thanks all,
> Yeah, checked the settings, and when i have the thing talk to a
> program that just prints out whatever the serial port reads, It was
> looking fine.
> Incorrect baudrate was my first problem, and did cause weirdness,
> escpeially on the latter end of the message, but this isn't the same
> problem. Just don't know how to read it.
> thanks
>
> shawn
>
>
> On Sun, Nov 2, 2008 at 9:38 AM, Brian C. Lane <bcl at brianlane.com> wrote:
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>>
>> shawn bright wrote:
>>> Hey there all,
>>>
>>> I have a gps device that talks to the computer over a serial port.
>>> i am using the pyserial module and getting values in.
>>
>> Here are the relevant bits of a serial to tcp/ip app that I use. Most
>> likely you have the wrong baudrate set. If it is an older GPS device the
>> baudrate will be 4800, newer devices allow you to set it to higher
>> speeds, 9600 being standard. Check the device settings to make sure that
>> it doesn't have any weird parity settings too. 8 bits, No Parity, 1 stop
>> bit is common.
>>
>>
>> import sys
>> import serial
>>
>> port = "/dev/ttyS0"
>> baud = 9600
>>
>> ser = serial.Serial()
>> ser.port = port
>> ser.baudrate = baud
>>
>> try:
>>    ser.open()
>> except:
>>    sys.stderr.write("Error opening serial port %s\n" % (ser.portstr) )
>>    sys.exit(1)
>>
>> ser.setRtsCts(0)
>>
>> while 1:
>>    # Read from serial port, blocking
>>    data = ser.read(1)
>>
>>    # If there is more than 1 byte, read the rest
>>    n = ser.inWaiting()
>>    if n:
>>        data = data + ser.read(n)
>>
>>    sys.stdout.write(data)
>>
>>
>>
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>> Software, Linux, Microcontrollers             http://www.brianlane.com
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>>
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>