Nokia 3310 SMS Application, done:connecting to serial port(linux/win), done:reading some hex like \x00 . . ., problem:write/send command! noresponse
tjreedy at udel.edu
Thu Sep 19 17:01:37 CEST 2002
"Polerio Babao Jr.II" <ptbjrii at hotmail.com> wrote in message
news:52facf1d.0209190533.3048e62c at posting.google.com...
> Greetings: Python Masters
> I wanted to create an SMS application using Nokia 3310 with
> DAU-9P(data cable),
> When I connect to the port for the first time I get the ser.read()
> output like this \x00\x0c I think. But that's two response is what I
> get on my first connect. After that when I envoke ser.read() again,
> get nothing.
I know nothing about Nokia but have had experience (and battle scars)
programming serial i/o. Two suggestions.
First: make *sure* you have serial protocol set right -- baud rate,
data bits, stop bits, parity, handshaking? Also make sure you have
proper pins active and properly connected. It is easy to be off.
Second: if you do not have one, get a breakout box that lets you see
activity at the port. Its the equivalent of having a
volt-ohm-ammeter. You plug cable into box and run another cable from
box to port. A simple one just has lights that flash when a signal
passes thru. More complicated one allows some signal patching. I got
mine long ago from Inmac. Would check google for source now.
That you *seem* to be getting response from Nokia and then not is
puzzling. Breakout box would give you better idea of what is
Terry J. Reedy
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