Re: [Gumstix-users] Read/write serial on gumstix

[Polychronis Y. <ypod@MIT.EDU>]

Just wanted to close this issue, pyserial does work fine over /dev/ttyS2 ().
You do need to send a 'newline' after each string, but when sending raw 
characters
to the serial port, you have to send ASCII character number 13 followed 
by 10 (CR+LF).
'\n' is merely interpreted as '\' and 'n'.
You can send CR+LF in python using chr(13)+ch(10), then the 
communication with serial port
works just fine.

p.

Dave Hylands wrote:
> Hi Drew,
>
> On 12/10/06, Drew Harry <dh...@me...> wrote:
>   
>> I've been trying to read and write with the STUART bus on a gumstix.
>> I've been working in Python with PySerial. I have no problems
>> reading, but I can't seem to write. Doing ser.write("hello world") as
>> suggested by PySerial doesn't do much. I'm using Terminal.exe in
>> Windows on the other end, and have otherwise not had any problems
>> with it. I've also tried echo "hello" > /dev/ttyS* with no effect.
>> Any ideas what I might be doing wrong?
>>     
>
> Try adding a newline. Many file I/O systems use what's known as line
> buffered output and it waits until a newline character is send before
> any data is sent.
>
> I've not used Python before, so that's just a stab in th dark.
>
>