Interfacing gsm modem, real time clock , and at89c/s52 microcontroller

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prabin20

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Hi Guys, hw r u all ......? i am working on a project, in which i have to send sms continuously after certain intervals of time. The sms will be sent through GSM Modem Sim 300 attached with the AT89C52 Micro controller.To provide time, i will use RTC.

The SMS send through GSM modem should have format like :

-----------------------------------------------------
New SMS:
Time:Monday, 22 April 2013, 09:00 HRS
#Message#
-----------------------------------------------------

Guys, please help me out !!!
 

ok.
on which part of project you stuck??
I mean what is your problem??
Happy to Help
regards
ANJ
 

@ANJ, Thanks for ur interest. See i want to send SMS after every 3 days for that i am using RTC. i have coded for sms part, now i donot know how to integrate with rtc to send message at the time given.....please also help in RTC Coding.
 

RTC and Keypad Code is available in "The 8051 Microcontroller and Embedded Systems: Using Assembly and C" book by Mazidi. Check if ROM will be sufficient for your Code. You may need an external i2c eeprom.
 

as suggested by jayanth you can see mazidi and learn how to modify that part for your needs.
also you can download this: **broken link removed**
see this too if this helps
**broken link removed**
let us know what is your progress.
 

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