how to made relay on/off using gsm sms?

[Jignesh Panchal]

hello..

 

 

i need some help. friends.

 

how to made relay on/off using gsm sms. and it possible to make this without microcontroller.

[AJISH ALFRED]

I don’t think it is possible without microcontroller. But there are certain examples by which you can control the relays by making a call to the gsm modem.

[Jignesh Panchal]

thank you dear…
but i want making it project without micrecontroller.
but can give me information for gsm module and how can i use  the gsm module.

[AJISH ALFRED]

You can surely control relays without using microcontroller. I hope the project published in this site itself will give you some idea about it.

Go to this location of the site

/contribution/cell-phone-controlled-robot

 

 

[Jignesh Panchal]

thank’s friend…
but can you say me what is the i/p, o/p of the gsm module..

[AJISH ALFRED]

The GSM module can communicate with any other devices using two pins RX and TX. The data is sent or received serially through this pin. The data is nothing but AT commands which the GSM module can understand. You need a programmed device to make use of these pins.

Apart from this pin the GSM module has a speaker out which you can use with dtmf decoder to control the relays as described in that project.

YOU BETTER USE A CELL PHONE other than the GSM module since there is no microcontroller in your project.

[Jignesh Panchal]

thank you Ajish

[AJISH ALFRED]

You are welcome. Feel free to share your further doubts.

[Hariharan]

however you interface a gsm module it need to a microcontroller to understand the DTMF(dial tone mode frequency) of your mobile…..

 

[AJISH ALFRED]

Hi Hariharan,

With the help of DTMF decoder IC you can avoid a microcontroller.

[nirmal]

hi ..can u write a code for me ..with using micro controller 89c51..please,,

[Author]

Posts