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Designing GSM module with microcontroller and GSM chipset/IC

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bigdogguru said:
You may need to put the phone into "AT Command Entry Mode".

Have you found the phone's documentation covering it's AT Command Set?

If so, can you either upload or post a link?

BigDog
Click to expand...

Didn't find any document specific to Nokia 3220.

---------- Post added at 08:25 ---------- Previous post was at 07:59 ----------

I was aware of F-Bus/M-bus but not tried. Such adapter seems complicated. Currently my connection is as like as shown here - Nokia ST (Star Torrent) 2112, 2115, 2270, 2272, 2280, 2285, 3100, 3105, 3108, 3120, 3125, 3200, 3205, 3220, 3585, 3586, 3587, 3588, 3589i, 5100, 5140, 6011i, 6012, 6015, 6015i, 6016i, 6019i, 6020, 7210, 7360 pop-port LIKE-DKU-5 or CA-42 cable schemat

Only difference is - I've used PC's USB power supply instead of 7805 IC shown in the above link.
 

I suggest you gothrough the link


Feel free to ask any Question
 
Last edited:

hello
i design a pic18f252 board to connect with a sim900 board. i can send and receive data to/from computer with my picmicro(baud:9600 8N1None).also i can connect ma sim900 module to pc with rs232 serial(baud:9600 8N1None).but when i connect picmicro board to sim900 module and send (AT+0x0D+0x0A) to sim900,H receive AT instead OK.
please help me.
thank you.
 

RaminGsm said:
when i connect picmicro board to sim900 module and send (AT+0x0D+0x0A) to sim900,H receive AT instead OK.
Click to expand...
Is there a chance to have the echo option enabled and you read back your transmitted data before modem's answer?
 

my Program in mikroc Pro is:
#define LED1 PORTA.B0
#define LED2 PORTA.B1
#define Buzzer PORTB.B4

char receive;
void main()
{
int i=1;
TRISA.B0=0;
TRISA.B1=0;
TRISB.B4=0;
TRISC.B6=0;
TRISC.B7=1;

UART1_Init(9600);
delay_ms(400);
UART1_Write_Text("AT\r");
delay_ms(200);

while(i==1)
{ //First while loop
if(UART1_Data_Ready()==1)
{
receive = UART1_Read();
if((receive=='K')||(receive==0x4B)||(receive=='k')||(receive==75)||(receive=='O')) LED2=1;
else if(receive=='A') Buzzer=1;
else LED1=1;
}
}
}
and my serial connection is in attach pdf file.
in hyperterminal(between sim900 and pc) i don't have any problem.
but problem is in connection between picmicro and sim900 modoule .
 

Attachments

  • Sheet1.pdf
    103.3 KB · Views: 80

hi.is there any reference design for x-gold101(xmm1010)?
i cant found any!
 

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