http://store.extremeelectronics.co.in/GSM-Connected-Notice-Board.html
Trouble In Sending An Sms To Notice Boarad
1st thing that I want to mentioned here whenever i am sending sms through mob it should display the msg but it no showing anything please tell me waht to do...many time i am geeting "ddddddddddd" on my lcd i have make the conection according to diagram.. as i have 2 terminal one hqve 3 pin rx tx gnd and another are rs232 so should i connect my max to Rx Tx Gnd terminal or dirctly to rs232 terminal?
Notice board using gsm..
For any more deatil you can reffer electronichub
http://www.electronicshub.org/wireless-electronic-notice-board-using-gsm/
from there only i made copy...
Images

Program
while (rx_data() ! = 0x0d);
while (rx_data() ! = 0x0a);
if (rx_data() == ‘+’)
{
if (rx_data() == ‘C’)
{
if (rx_data() == ‘M’)
{
if (rx_data() == ‘T’)
{
if(rx_data()==’I’)
{
while (rx_data() != ‘,’);
a = rx_data ();
delay_ms (10);
tx_string (“at”);
tx_data (0x0d);
tx_data (0x0a);
tx_string (“at + cmgf =1”);
tx_data (0x0d);
tx_data (0x0a);
tx_string (“at + cmgr =”);
tx_data (a);
tx_data (0x0d);
tx_data (0x0a);
while (rx_data() ! = 0x0a);
while (rx_data() != 0x0a);
while (rx_data() ! = 0x0a);
for (i=0; i<15; i++)
{
read [i]= rx_data();
}
lcd_stringxy(1,0,read);
delay_ms (5000);
}
}
}
}
}
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