#include<reg51.h>

sbit level_1=P2^0;
sbit level_2=P2^1;
sbit level_3=P2^2;
 
sbit level_indication_1=P1^0;
sbit level_indication_2=P1^1;
sbit level_indication_3=P1^2;


void delay(unsigned int x)
{
unsigned int i;
  for(i=0;i<=x;i++);
}				

void tx(unsigned char num)
{ 
  SBUF = num;
  while(TI == 0);
  TI = 0;	  
  delay(500);
}

void tx_string(unsigned char *y)
{
	while(*y!='\0')
	{
		tx(*y);
		y++; 
  		delay(500);
	}
}
void main()
{ 
unsigned char a,b,c;	
level_indication_1=0;
level_indication_2=0;
level_indication_3=0;
  SCON=0x50;
  TMOD=0x20;
  TH1=0xfd;
  TR1=1;

  tx_string("AT");		
  tx(0x0d);
  delay(60000);
  tx_string("AT+CMGF=1");	  
  tx(0x0d);
  delay(60000);		

  while(1)
  {					  			  
if(level_1==1)
{
if(a==0)
{
level_indication_1=1;
	a=1;
  tx_string("AT+CMGS=");
  tx('"');
  tx_string("08758431084");
  tx('"'); 
  tx(0x0d);
  delay(60000);
  tx_string("LEVEL 1 REACHED");
  tx(0x1a);
  delay(60000);	
  delay(60000);	
  delay(60000);	
  }
  }		 
  else
  {					 
level_indication_1=0;
  a=0;
  }
if(level_2==1)
{
if(b==0)
{					
level_indication_2=1;
	b=1;
  tx_string("AT+CMGS=");
  tx('"');
  tx_string("08758431084");
  tx('"'); 
  tx(0x0d);
  delay(60000);
  tx_string("LEVEL 2 REACHED");
  tx(0x1a);
  delay(60000);	
  delay(60000);	
  delay(60000);	
  }
  }		 
  else
  {				  
level_indication_2=0;
  b=0;
  }	
if(level_3==1)
{
if(c==0)
{					
level_indication_3=1;
	c=1;
  tx_string("AT+CMGS=");
  tx('"');
  tx_string("08758431084");
  tx('"'); 
  tx(0x0d);
  delay(60000);
  tx_string("LEVEL 3 REACHED");
  tx(0x1a);
  delay(60000);	
  delay(60000);	
  delay(60000);	
  }
  }		 
  else
  {				  
level_indication_3=0;
  c=0;
  }
  }
}