GM47 GSM module issue

[Jibeji]

Hello,
I am trying to set up a Sony Ericsson GM47 GSM module. It communicates correctly with the SIM card, as I am able to read it with AT commands.
The problem is that it does not register to the GSM network.
The status LED blinks every 3 seconds : 3 seconds ON, 3 seconds OFF.
A GSM antenna is pluged, and the SIM card works perfectly in a cell phone.
Is there an AT command which permits to know what's going wrong ?
Do I have to send a special command to ask the module to register ?
Thanks for your help.

 

[war4one]

Is there an AT command which permits to know what's going wrong ?
Do I have to send a special command to ask the module to register ?

You can download source code from **broken link removed**.
This system based on GR47 or GR64 module and ATmega128.
May be this can help:

void GRInit(void)
{
	if (GSMStatus == 0)						// Нужно включить GSM-модуль
	{
		SetActiveUart(GSM_UART);		
		printf("AT\n\r");
		delay_ms(2000);

		StringBuilder1();

		if (strstr(ReceiveString1, "OK") != NULL)	// Если GSM-модуль ответил "OK"...
		{			
			SetActiveUart(GSM_UART);
			printf("ATE=1\n\r");							// ...выключаем эхо, чтобы не забивать приемный буфер
			delay_ms(500);
			printf("AT*E2RS232=2\n\r");				// ...выключаем аппаратный контроль UART'а GSM-модуля
			delay_ms(500);
			printf("AT+CLIP=1\n\r");					// ...включаем АОН
			delay_ms(500);
			printf("AT+CMEE=1\n\r");					// ...включаем расширенные коды ошибок (числами)
			delay_ms(500);
			printf("AT+CSDH=1\n\r");					// ...включаем возможность текстового режима
			delay_ms(500);
			printf("AT+CMGF=1\n\r");					// ...включаем текстовый режим передачи SMS
			delay_ms(500);
			printf("AT*E2SSN\n\r");
			delay_ms(2000);
			
			StringBuilder1();
			if ((strstr(ReceiveString1, "OK") != NULL)	&& (strstr(ReceiveString1, "ERROR") == NULL))	// Если GSM-модуль не выдал ошибки и выдал OK...
				GSMStatus = 1;																										// ...то изменяем статус на "Не зарегестрирован в сети"
		}//OK
	}//GSMStatus
}//GRInit

 

[lucian_v]

Hi

Have you managed to make it work?
I am working on this project
SMS remote control v3.0 :: Based on GM-47 GSM module.

cheers

 

[mahesXtremeEngineering]

If the LED blinks it means that the module is connected to a network. LED will be on without flashing when module is powered on.

 

[lucian_v]

Hi
Thank you for your answer
My led is off ....
I put on ground pin 14 of the modem for 2-3 sec but led is still off

Do you have any idea if i could connect this modem to pc by serial?

thanks again....

 

[mahesXtremeEngineering]

Did you made the connection exactly as shown in the diagram. The ground should be applied by shorting pins 2,4,6,8,10,12,14.

https://www.google.co.in/url?sa=t&r...sg=AFQjCNFhQpK4x2bplL3yDaUZSE2qFiyyJQ&cad=rja

 

[lucian_v]

Yes,
I am using the same manual...