// #define VRX_PIN  A0 // Arduino pin connected to VRX pin
// #define VRY_PIN  A1 // Arduino pin connected to VRY pin
#define VRX_PIN  2 // ESP32
#define VRY_PIN  4 // ESP32

#define COMMAND_ZERO   0
#define COMMAND_LEFT   1
#define COMMAND_RIGHT  2
#define COMMAND_UP     3
#define COMMAND_DOWN   4

#define LEFT_THRESHOLD  1000
#define RIGHT_THRESHOLD 3000
#define UP_THRESHOLD    1000
#define DOWN_THRESHOLD  3000

int command = COMMAND_ZERO;

int valueX = 0; // To store value of the X axis
int valueY = 0; // To store value of the Y axis

void setup() {
  Serial.begin(115200) ;
}

void loop() {
  // read analog X and Y analog values
  valueX = analogRead(VRX_PIN);
  valueY = analogRead(VRY_PIN);

  // print data to Serial Monitor on Arduino IDE
  Serial.print("x = ");
  Serial.print(valueX);
  Serial.print(", y = ");
  Serial.print(valueY);

  command = COMMAND_ZERO;
  if (valueX < LEFT_THRESHOLD)
    command = COMMAND_LEFT;
  else if (valueX > RIGHT_THRESHOLD)
    command = COMMAND_RIGHT;

  // check up/down commands
  if (valueY < UP_THRESHOLD)
    command = COMMAND_UP;
  else if (valueY > DOWN_THRESHOLD)
    command = COMMAND_DOWN;

  Serial.print("\t");
  switch (command) {
  case 0: { Serial.println("COMMAND STOP");  
  break; }
  case 1: { Serial.println("COMMAND LEFT");  
  break; }
  case 2: { Serial.println("COMMAND RIGHT"); 
  break; }
  case 3: { Serial.println("COMMAND FORW");  
  break; }
  case 4: { Serial.println("COMMAND REV");  
  break; }
  default:{ Serial.println("COMMAND STOP"); 
  break; }
  }
  delay(200);
}