void read_sensors(void){
    uint8_t i=0,ii=0;
    float tmp;
    uint8_t samples=200;
    while(i<8){
        tmp=0;
        while(ii<samples){
            tmp = tmp + convertanalog(i);
            ii++;
        }
        ii=0;
        tmp = ((((tmp / samples) / 1024)*900)+32);
        sensor_data[i] = tmp;
        i++;
    }
}