PIC microcontroller interface with GSM SIM 300 problem

[kgshankar1980]

Re: 1. Interfacing SIM300 GSM module with microcontroller PIC6f877a

@Dhananjayal,

Ok fine...

Now follow the steps to check whether your SIM 300 gsm module is working properly or not..

1. Insert the valid sim card for the sim300 module.
2. Connect the UART of GSM module to hyperterminal.
3. Set the hyperterminal baud rate - 115200,8,n,1
4. Now turn ON the gsm module and see what results are you getting in the hyperteminal.
5. If you are getting "Call Ready" in the hyperterminal then your module is working fine.

If not then there is an issue with the module. Confirm this first and let me know.

 

[kgshankar1980]

@Jayanth,

I have asked Dhananjayal to check first whether gsm module is working fine.

The steps are given in another posts created by the same person.

If it works fine as per what i had told, then we will go to next step of analysing the problem.

 

[Mrunal Ahirrao]

Re: 1. Interfacing SIM300 GSM module with microcontroller PIC6f877a

Hi Dhananjaya,
Try this code for sending SMS from MCU ... I have tested it successfully using PIC16F628A MCU with MikroC as compiler.

delay_ms(60000);
UART1_Init(9600);
UART1_Write_Text("AT\r");
Delay_ms(2000);
UART1_Write_Text("AT+CMGF=1\r");
Delay_ms(2000);
UART1_Write_Text("AT+CMGS=");
Delay_ms(2000);
UART1_Write(0x22); //” double qoute
Delay_ms(2000);
UART1_Write_Text("91....");//Enter your mobile no.
UART1_Write(0x22); //” double qoute
UART1_Write(0x0D); // mean Enter
UART1_Write_Text("Hi");
Delay_ms(2000);
UART1_Write(26); //Ctr +Z
Delay_ms(2000);
//UART1_Write(0x0D); // mean Enter
}
}