Remote Security Camera

//Security Camera Code

Servo myservo;  // create servo object to control a servo
                
                
int pos = 0;                                                // variable to store the servo position
int digitalvalue=0;                                         //sets inital values for graphs
int status=0;


void setup()
{
    Particle.function("gong", gong);                        // create a function called "gong" that
                                                            // can be called from the cloud
                                                            // connect it to the gong function below

    myservo.attach(D0);                                     // attach the servo on the D0 pin to the servo object
    myservo.write(50);                                      // initial servo position
    
        Particle.function("transistor", transistor);        // create a function called "gong" that
                                                            // can be called from the cloud
                                                            // connect it to the gong function below

    Particle.variable("digitalvalue", &digitalvalue, INT);  //data for graphing
    Particle.variable("status", &status, INT);
    Particle.function("digitalvalue",transistor);
    Particle.function("status",gong);
    
    
    pinMode(D7, OUTPUT);                                    // set D7 as an output to control transistor
}



int transistor(String command) 
{   delay(1000);                    
    if(command == "on")                                     //when command is on, pin D7 set to high
    {                            
    digitalWrite(D7, HIGH);
            Particle.publish("cam_on","camera is on");      //publishes to the cloud to communmicate with other particle
            digitalvalue = 1;                               //sets digital value to 1 to be graphed
    
        return 1;                                           //returns 1 if command is understood              
    }
    else if(command == "off")                               //when command is off, D7 set to low
    {                               
    delay(1000);
    digitalWrite(D7, LOW);
            Particle.publish("cam_off","camera is off");    //publishes to the cloud to communmicate with other particle
            digitalvalue= -1;                               //sets digital value to -1 to be graphed
            delay(1000); 
            
            
        return 2;                                           //returns 2 if command is understood                  
    }

}



int gong(String command)                                    //function to control camera turn
{                          
    if(command == "right")                                  //if command is right, camera turns to the right
    {                            
           // wait 100 ms
        myservo.write(0);                                   // move servo to 0°
          // turn off LED
          status = 1;
          
        return 1;                                           // return a status of "1"
    }
    else if(command == "left")                              // if command is left, camera turns to the left
    {                               
    
            myservo.write(100);                             // move servo to 100°
            status = -1;
                
                
            delay(1000);             
        return 2;                                           // return a status of "2"
    }
      else if(command == "center")                          // if command is center, returns to 50°
    {                               
    
            myservo.write(50);
            status = 0;
                
                
            delay(1000);              
        return 3;                                           // return a status of "3"
    }
}

void loop()
{
                                                            // empty because we call functions via the cloud
}