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Intrusion notification by SMS

Hi,

I'm now trying to build a circuit diagram using PIC16F877 microcontroller which is linked to a RS232 with a GSM modem (Siemens TC35) or a handphone to send a SMS message to user phone on intrusion alert. Example, sending a message on "Alarm! Intrusion" to user handphone if there is an activation.  Can anyone advise on the source code for this application using the MPLAB IDE and any relevant schematic diagram on this?
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DavChan
Asked:
DavChan
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anupvijayCommented:
Hi DavChan,
I am not an expert on  PIC16F877 MCU but some search got me this link below. Although it is about a problem which
the person is trying to solve but the code might give you an idea on the approach to the question of yours.

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=8djtcf%24ll2%241%40news.liv.ac.uk&rnum=1


Will try to find out more about this MCU and post it it soon of I get hold of any.

Cheers.
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anupvijayCommented:
Although if you need to know on how to send SMS from a mobile phone  then it is as below.

Initiate serial communication with the GSM Modem/phone.
Write AT commands for sending SMS to the serial port.
Check response.

And there you go ;-)

About AT commands for SMS etc please see the following discussion.

http://www.experts-exchange.com/Programming/Wireless_Programming/GSM/Q_20948621.html

All the best
Cheers.
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