In connection with today’s advance technology and field of embedded electronics project, interfacing GSM module with pic microcontroller is very important for remote and wireless communication. GSM stands for Global system of mobile communication is widely used chip and reliable mobile network. If we done interfacing GSM module with pic microcontroller then we can use this huge GSM network as input out output for our project.
In my project I use GSM module for sending SMS to a specified GSM mobile number. And here you can learn how we did interfacing GSM module with pic microcontroller. Here we did interfacing of GSM module with PIC16F877 microcontroller. So to complete our project we are used
1) PIC16F877 Microcotroller
2) SIM300 GSM module ( I used NOKIA 5130c Mobile phone as a GSM module)
3) Serial cable (For interfacing between Microcontroller and GSM module)
To complete the project we should follow some steps
1) Test the simple AT Command.
2) Connect a call to a GSM mobile number (Dial a number).
3) Send a text message to a mobile number
Now question is how we test AT command?
You can easily test it on windows Hyperterminal software. See bellow picture how it look like.
Here you can find the step by step process of how we test AT command? Must see the video:
AT+CMGF Message Format : This command is used to select SMS protocol data unit (PDU) mode or SMS Text mode.
AT+CSCS Select TE character set : This command informs the data card of which character set is used by the TE. The data card is then able to convert character strings correctly between TE and ME character sets.
AT+CMGS Send Message : Sends a message from a TE to the network (SMS-SUBMIT). The message reference value <mr> is returned to the TE on successful message delivery. Sending can be cancelled with the <ESC> character. <ctrl-Z> must be used to indicate the ending of the message body.
Bellow you will see the Circuit Diagram of interfacing GSM module with pic microcontroller
Now to run this project you need the Embedded C Code. I write the C code on Mikcro c Pro for Pic bellow you will see the C-Code
For Proteus circuit diagram and how It simulate? must see the video given bellow.
Read more : Interfacing GSM module with PIC Microcontroller