STP.Asghari
New Member
When I give the AT command to the module. The module should give me the answer AT\r\nOK\r\n but to my surprise it gives the answer AT\r\r\nOOK\r\n. I understood this problem by getting the answer from the code below. While if I delete the wrong lines from the code below, the module does not respond.
Code:
Send_AT();
do
{
buffer=get_char();
}while(buffer!='A');
buffer=get_char();
if(buffer=='T')
{
buffer=get_char();
if(buffer=='\r')
{
buffer=get_char();
if(buffer=='\r')
{
buffer=get_char();
if(buffer=='\n')
{
buffer=get_char();
if(buffer=='O')
{
if(buffer=='O')
{
buffer=get_char();
if(buffer=='K')
{
buffer=get_char();
if(buffer=='\r')
{
buffer=get_char();
if(buffer=='\n')
{
for(i=0;i<5;i++)
{
HAL_GPIO_WritePin(GPIOC,GPIO_PIN_13,GPIO_PIN_SET);
HAL_Delay(500);
HAL_GPIO_WritePin(GPIOC,GPIO_PIN_13,GPIO_PIN_RESET);
HAL_Delay(500);
}
}
}
}
}
}
}
}
}
}