tanker - were you meant to post something above?
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SMS with GSM modem
Windows XP
I need assistance writing some delphi code to send an sms message from my PC via a GSM (USB) modem.
Also if someone would clarify with me what is involved e.g is it just an applitaction to send SMS or do I need to create or use an SMS server?
Also I think sending SMS via GSM is charged by data rate where normal SMS are charged per SMS - is this correct
Sorry a little niave on this subject
Dave
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Answers
Most phone companys provide an sms gateway through email. If you use this method, all you need is a program that sends emails which may be alot easier.
http://en.wikipedia.org/wi
I dont know if using GSM modem is the same as using a phone conected to a PC, but I guess it should be. In that case you can use regular AT commands to send text messages (even EMS)
In my application I used TComport component to connect to USB port (emulation to COM) - http://www.torry.net/vcl/c
Then its just a matter of knowing what to send. Some cell phones enable user to send raw data - text, receiver... and they encode it themselves, but some phones require you to encode it yourself (which was my case)
Try checking this http://www.developershome.
If you want, I can provide you with my unit for sending SMS (know that it is messy, but works with both 7bit and 16bit encoding and multiple messages..)
Hi Bezy, Jonas, and Geert thank you all for your comments - sorry was a weekend here so only just read.
Bezy - it would be great if you could send the code so I could have a look dave.r@monitorwa.com.au
Geert - these was a sample app that came with the modem but very little info apart from that.
Does any of you know if you can send text messages VIA GSM - for some reason I think that there is a way to send these messages VIA GSM and the provider is only charging you for the data you send rather than a per message charge as they would if you were using their gateway which can often be $.25 or similar - I have seen providers offering this for $0.09 but if it were GSM and only charging by data I think it would be about $0.01 or even less.
Im not certain I am correct about this so if any of you know please correct me
thanks
Dave
1) Connect to your phone via some COM port component (supposing the phone is connected to USB port - check the port in Device Manager)
2) Send the following commands to the COM port:
-> AT
OK
-> AT+CMGF=1
OK
-> AT+CMGW="+3598881230000"
-> > Tst SMS messaging.
+CMGW: 1
OK
-> AT+CMSS=1
+CMSS: 20
OK
The lines that start with -> are the commands you have to send. The other lines are the response.
Since you are using the AT commands to send the SMS, you are not dialing a Data call. So SMS should be charges the regular way.
Example for GSM modem for SMS receiving / transmitting:
http://www.gsm-modem.de/gs
Further details on SMS receiving / transmitting by GSM modem and by direct connect to SMSC as well:
http://www.gsm-modem.de/sm
Regards
Meff
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by: tankergoblinPosted on 2009-06-18 at 21:41:54ID: 24663891
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