kblim,
there are so many GSM-Modules (Engines) or even "standalone" GSM-Terminals available at reasonable prices.
OK, for a single shot prototype for home use one could try a mobile phone, but...
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kblim,
there are so many GSM-Modules (Engines) or even "standalone" GSM-Terminals available at reasonable prices.
OK, for a single shot prototype for home use one could try a mobile phone, but...
Ioannis is right.
There are two GSM-Terminals I can recommend:
SIEMENS TC35i Terminal
and the Telit Terminal Ioannis has already mentioned.
Rufinus,
I'm glad to hear you have got it to work!
Why do you want to use PDU format, doesn't the S55 support TEXT?
A simple NPN Transistor and two resistors would do here.
(Invert the logic and shift the level to 5V)
Find out what level the Phones TX Pin has in Idle state, and what it is in active state.
Rufinus,
I hate to say that, but you have got to do some homework.
Make yourself familiar with the principles of serial communitation and the datasheet of a MAX232.
Pay special attention on...
Rufinus,
I don't have the full specs of S55/S65
but this looks like a problem with the logic levels.
(Presuming your Code is OK)
Could you Scope the phones TX Pin to see wether it is sending...
Rufinus,
I guess the problem is with the Siemens Datacable.
Most cables have some embedded electronics.
(At least a level shifter, probably more..)
This is usually powered from the PCs serial...
tsupuntu,
See: This
And read the GSM thread from the beginning.
aruran,
it would be nice if you would share youre code.
...nor RS232
You will never get this to work if you don't take the time to read any datasheet.
aruran,
I'm sorry, but I really can't tell which cable to use with the 7250i.
For my tests I used a 6210 with a standard (NoName) Data cable.
All I can tell is:
If your Phone doesn't...
Have you yet asked yourself why?
Have you taken some time to read this thread from the beginning and checked the links posted here ?
kasamiko,
see comments
As I was interrested in "NEW" Messages only (the ones I had not already taken action on) "UNREAD" was correct.
Steve, thanks for the reminder ;-)
As you can see, many beginners are giving themselves a hard time by starting with that "great" F84 while life could be so easy with one of the recent 18pin...
Again:
Please stop sending PMs asking: would Phone Model X work?
I definitely don't know all brands and models available on the market.
And I don't know the pinouts of all those different...
Dear Forum Members,
I will defititely no longer reply to any PM's regarding this thread.
All information you need to get started can be found here.
stu746
check PM
Have you tried this code with the PIC connected to your PC running Hyperterm at 9600 Baud?
You should see: atd 453
in the terminal window when you start the PIC.
Once you have got this working...
stu,
could you post your code and schematic?
without it all we can do is guessing.
regatds
Ralph
Just another question that pops up:
Assuming you have DB9 connectors at both ends (PIC and PC)
are you using a "Null-Modem" when connecting the the Phone to the PIC?
regards
Ralph
I can't tell wether the "Taiwan-Cable" I have used was a "DLR-3P" type or something else.
But I think it does not really matter as you are saying your cable works with "HyperTerm".
Do you have...
Try it with both RTS and DTR on the data cable connected to +5V.
If this doesn't work you may need a higher voltage (up to +12V)
regards
Ralph
It is correct, to communicate with the phone you only need RX, TX and GND.
But the Data cable has some embedded logic that is powered from the DB9 connector DTR and/or RTS pin.
regards
Ralph
@ Bulman
before you buy a mobile phone
you should have a look at at the SIEMENS TC35i GSM Terminal.
It is more reliable and has more features.
(i.e. remote reset and remote power on/off)
The...