Jestin Kuriakose
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I am working on a embedded project using GSM SIM300.i am using Atmel at89s52, GSM module ,temperature sensor LM35.
Working of project- Temp sensor will sense the temperature and sent a message to my cell phone only if the temperature is above 30^c,,and if i sent a SMS to the cell phone(for eg-OK),the relay connected to the microcontroller should turn ON.My code is as follows-
i am not getting output with this code.i am having doubt with the recieving sms to the gsm modem.can anyone point out the mistakes in my code ??
Working of project- Temp sensor will sense the temperature and sent a message to my cell phone only if the temperature is above 30^c,,and if i sent a SMS to the cell phone(for eg-OK),the relay connected to the microcontroller should turn ON.My code is as follows-
Code:
#include<reg51.h>
#include<stdio.h>
#define MYDATA P1;
sbit ALE=P2^4;
sbit OE=P2^5;
sbit SC=P2^6;
sbit EOC=P2^7;
sbit ADDR_A=P2^0;
sbit ADDR_B=P2^1;
sbit MOTOR=P2^2;
unsigned char rx[20],msg[6];
unsigned char sensor1,adc1,r;
void clear(void)
{
unsigned char r;
for(r=0;r<100;r++)
rx[r]=0x00;
}
void clear1(void) //user msg
{
unsigned char n;
for(n=0;n<=5;n++)
msg[n]=0x00;
}
void serialcomm()
{
TMOD=0x20; // Mode=2
TH1=0xfd; // 9600 baud
SCON=0x50; // Serial mode=1 ,8-Bit data,1 Stop bit ,1 Start bit , Receiving on
TR1=1; // Start timer
}
void delay(unsigned int value)
{
unsigned int i,j;
for(i=0;i<value;i++)
for(j=0;j<1275;j++);
}
void serial(unsigned char x)
{
SBUF=x;
while(TI==0);
TI=0;
}
void Send2Gsm(char *aaa)
{
while(*aaa!='\0')
{
serial(*aaa);
aaa++;
}
}
unsigned char convert(void)
{ unsigned char value;
delay(1);
ALE=1;
delay(1);
SC=1;
delay(1);
ALE=0;
SC=0;
while(EOC==1);
while(EOC==0);
OE=1;
delay(1);
value=MYDATA;
OE=0;
return(value);
}
void receive_data() interrupt 4 // Function to recieve data serialy from RS232 into uc
{
unsigned char r;
rx[r]=SBUF; // Read sbuf
RI=0;
}
void main()
{
char string1[10};
int temp;
serialcomm();
Send2Gsm("AT\r\n");
delay(2);
Send2Gsm("AT+CMGF=1\r\n");
delay(2);
Send2Gsm("AT+CMGS= +918762357075\r\n");
delay(2);
Send2Gsm("hello");
serial(0x1a);
while(1)
{
ADDR_B=0;
ADDR_A=0;
sensor1=convert();
if(sensor1>60 )
{
temp=(adc1*0.489);
sprintf(string1,"%d",temp);
delay(500);
Send2Gsm("Temperature=");
Send2Gsm(string1);
Send2Gsm("*c");
delay(500);
serial(0x1A);
delay(500);
IE=0x90;
while(rx[r]=='?')
{
IE=0x00; //disable interrupt
if(rx[0]=='*' && rx[1]=='O' && rx[2]=='N' )
{
MOTOR=1;
clear();
clear1();
}
else if(rx[0]=='*' && rx[1]=='O' && rx[2]=='F')
{
MOTOR=0;
clear();
clear1();
}
}
}
}
}i am not getting output with this code.i am having doubt with the recieving sms to the gsm modem.can anyone point out the mistakes in my code ??