File content as of revision 1:b63b3fcf72d1:

#include "mbed.h" 
#include "DHT.h" 
void motor();
DHT sensor(D4, DHT11); 
Serial pc(USBTX, USBRX); // tx, rx

DigitalIn pir(D4); 
DigitalIn pir2(D2);  //Connect it to 
Timer timer;

int main() {
    int error = 0; 
    float  f = 0.0f;//, k = 0.0f, dp = 0.0f, dpf = 0.0f, h = 0.0f, c = 0.0f; 
    while(1) { 
    wait(2.0f); 
    error = sensor.readData(); 
    if (0 == error) 
    { 
        f = sensor.ReadTemperature(FARENHEIT); 
        printf("\r\nTemperature in  Farenheit %4.2f\n", f); 
    } 
    else 
    {
        printf("\r\Error: %d\n", error); 
    } 
    if(f > 80)   
    {
        
        if(!pir && !pir2)
        {
            pc.printf("\r\nNothing Detected\r\n");
            pc.printf("\r\nTurn off stove\r\n");
            motor(); 
            wait(1);
        }
        else if(pir && !pir2)
        {
            
            pc.printf("\r\nKids/Cat Detected\r\n");
            pc.printf("\r\nTurn off stove\r\n");
            motor();
            wait(1);
        }
        else 
        {
            
            pc.printf("\r\nAdult Detected\r\n");
            wait(1);
        }
    }
    else
    {
        pc.printf("\r\nStove not turned on\r\n");
    }  
   }      
}

void motor(){
PwmOut PWM1(A5);

//int main()
//{
PWM1.period_ms(100);
int x;
x=20;
while(1)
{
PWM1.pulsewidth_ms(x);
//x=x+1;

wait(0.1);
//if(x==10)

x=0;

} 
}