Hacked Gadgets Forum

May 7, 2007

Microcontroller to SMS Interface

at 8:39 am. Filed under Complex Hacks, DIY Hacks, Electronic Hacks

In the microcontroller world some things are a bit tricky to do without some help. This can be some code libraries that help us talk to an LCD display, or communicate via some of the new serial protocols such as one wire. Elektronika.ba has done some work to help everyone out who wants to interface a microcontroller to a GSM phone. Thanks for making the English version for us. :) Code and diagrams are available on his site.

“This device acts as interface between your microcontroller project and a GSM phone. It handles all modem data communication between the GSM phone and your micro-project. The best thing is that it decodes PDU into TEXT on the fly!

It’s based on PIC16F877A microcontroller running on 16MHz at 5V. It has an onboard level converter for serial communication with the gsm phone because PIC’s UART RX input pin has a Schmitt trigger triggering at 4,5 - 5V while the phone is sending only approx. 3V from it’s TX pin. It also has a zener diode at TX pin so it doesn’t kill the phone’s network connection when talking to it. Firmware is 100% written in MPASM assembler.”

Thanks Mure.


 


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25 Responses to “Microcontroller to SMS Interface”

  1. NGinuity Says:

    I think I can use this :-) We have a ham radio repeater with no POTS available for remote management :-)

  2. Hannes Says:

    nice project!

  3. wuh Says:

    Maybe it would be better for you to use TwoWay Thing (from the same website), in that case you don’t need to do any developing of your own sms controller. TwoWay Thing is allready a finished sms controller, this SMS Box is an interface for the controller you are about to develop.

  4. NGinuity Says:

    wuh,
    Can you show me a direct link to it? I can’t read the language.

  5. L0rd_D4rk Says:

    This is great! it’s exactly what I need to read a remote sensor (it’s about 16km far), I will try to do something similar when I have time

  6. Alan Parekh Says:

    The second link is a direct link to the English version.
    http://www.elektronika.ba/projekti/?akc=daj_projekt&idprojekt=9

  7. NGinuity Says:

    Thanks Alan. I am still thinking it is best to just use the one GSM module…since I will be dialing into the device in question anyway, and I want to be able to dial in to it from anywhere. Basically, there is already a onboard 4 pin POTS line jack on the back of the repeater. I need to emulate what goes in between that jack and the dial in user. Any other ideas?

  8. J_man Says:

    awesome, thnx for the english version

  9. PCB Admirer Says:

    That is a beautiful circuit layout

  10. Sashi Says:

    PCB’s always amaze me, the circuits are so nice lookin.

  11. NGinuity Says:

    You know gang, with a little practice, you, too, can make PCB’s like that :-)

  12. wuh Says:

    Here is the direct link to another version http://www.elektronika.ba/projekti/?akc=daj_projekt&idprojekt=6
    . There is an english version at the middle of the page after the magazine picture.

  13. sheepdog Says:

    Superb piece of work, many thanks to the author

  14. NGinuity Says:

    wuh,
    Thanks a bunch for getting me that reference!

  15. Myrddinthegeek Says:

    Great project. Here is a link to someone doing the same thing but with an AVR. http://www.riccibitti.com/tinyplanet/tiny_article.htm

  16. aditi aradhye Says:

    we are doing same project but i am not getting its pdf file,please help me

  17. vipin Says:

    hello i m a finl yr engg student . i want to make a project on home security using gsm . i want that security msg come at our mobile phone automatically can you help me i m very thankful to you

  18. Alan Parekh Says:

    Hi vipin,

    Sounds like a nice project. Send me a link when you are done. :)

    To contact the developer of this project click on the link in the article.

  19. elektronika Says:

    Here I am, contact me through this link www.elektronika.ba/kontakt

  20. mariwa deogratius Says:

    hi,how can i have a schematic.
    telecom.eng from tanzania

  21. paul Says:

    plz hwo to input the program to hard ware

  22. Alan Parekh Says:

    Hi Paul,

    The microcontroller used is a PIC chip. To program these you need a PIC programmer, they are very common. Look up this search for many examples. Good luck!

    http://www.google.com/search?sourceid=mozclient&ie=utf-8&oe=utf-8&q=PIC16F877A++programmer

  23. Muhammad Says:

    hi dear!
    i appreciate ur hard work on this good site..
    actually i m student of final year electrical engg n the fina year project i chose,to present
    to my university,is “Home security system via SMS by GSM”..
    plz help me with schematic/circuit diagrams ,components to be used and other details
    of this project..
    i’ll be too much thankful to u..
    plz send helpful information on my email address…
    thanks a lot..

  24. didou Says:

    hi
    i need help
    i need a C programm to send and recive SMS with PIC16F877

  25. pankaj bhuva Says:

    please send c code file for microcontroller and mobile interface

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