I am doing a face recognition project using Visual Studio 2017 and Arduino. Visual studio sends the XY coordinates of the face to the Arduino, which then controls two servo motors. I am trying to display the values of valx and valy. I tried using Serial.print but it hasn't worked thus far. Is there another way of displaying valx and valy?

[code]#include

// Title: Auto Pan-Tilt Servo/Cam Control // Subject: This Sketch receives X,Y coordinates from serial then // moves the camera to center of those coordinates. // Remixed: TechBitar / Hazim Bitar // Date: Dec 2011 // Credit: I based this sketch on zagGrad's (SparkFun) code.

#define servomaxx 180 // max degree servo horizontal (x) can turn #define servomaxy 180 // max degree servo vertical (y) can turn #define screenmaxx 320 // max screen horizontal (x)resolution #define screenmaxy 240 // max screen vertical (y) resolution #define servocenterx 90 // center po#define of x servo #define servocentery 90 // center po#define of y servo #define servopinx 9 // digital pin for servo x #define servopiny 10 // digital servo for pin y #define baudrate 57600 // com port speed. Must match your C++ setting #define distancex 1 // x servo rotation steps #define distancey 1 // y servo rotation steps

int valx = 0; // store x data from serial port int valy = 0; // store y data from serial port int posx = 0; int posy = 0; int incx = 10; // significant increments of horizontal (x) camera movement int incy = 10; // significant increments of vertical (y) camera movement

Servo servox; Servo servoy;

short MSB = 0; // to build 2 byte integer from serial in byte short LSB = 0; // to build 2 byte integer from serial in byte int MSBLSB = 0; //to build 2 byte integer from serial in byte

void setup() {

Serial.begin(baudrate); // connect to the serial port Serial.println("Starting Cam-servo Face tracker");

pinMode(servopinx,OUTPUT); // declare the LED's pin as output pinMode(servopiny,OUTPUT); // declare the LED's pin as output

servoy.attach(servopiny); servox.attach(servopinx);

// center servos

servox.write(servocenterx); delay(200); servoy.write(servocentery); delay(200); }

void loop () { while(Serial.available() <= 0); // wait for incoming serial data if (Serial.available() >= 4) // wait for 4 bytes. { // get X axis 2-byte integer from serial MSB = Serial.read(); delay(5); LSB = Serial.read(); MSBLSB=word(MSB, LSB); valx = MSBLSB; delay(5);

// get Y axis 2-byte integer from serial MSB = Serial.read(); delay(5); LSB = Serial.read(); MSBLSB=word(MSB, LSB); valy = MSBLSB; delay(5);

// read last servos positions posx = servox.read(); posy = servoy.read();

//Find out if the X component of the face is to the left of the middle of the screen. if(valx < (screenmaxx/2 - incx)){ if( posx >= incx ) posx += distancex; //Update the pan position variable to move the servo to the left. } //Find out if the X component of the face is to the right of the middle of the screen. else if(valx > screenmaxx/2 + incx){ if(posx <= servomaxx-incx) posx -=distancex; //Update the pan position variable to move the servo to the right. }

//Find out if the Y component of the face is below the middle of the screen. if(valy < (screenmaxy/2 - incy)){ if(posy >= 5)posy += distancey; //If it is below the middle of the screen, update the tilt position variable to lower the tilt servo. } //Find out if the Y component of the face is above the middle of the screen. else if(valy > (screenmaxy/2 + incy)){ if(posy <= 175)posy -= distancey; //Update the tilt position variable to raise the tilt servo. }

// Servos will rotate accordingly servox.write(posx); servoy.write(posy); } }[/code]