//defining the pins used for joystick
# define VRx 4 // potenetiometer in x direction
# define VRy 3 // potenetiometer in y direction
# define SW 8 //switch
# define rst 1 //reset pin

void setup() {
  Serial.begin(115200); // wake up serial at a specific rate 
  Serial2.begin(115200);// wake up serial1 at the same rate  (check that this is the rate your bluetooth module wants)

  pinMode(VRx, OUTPUT);
  pinMode(VRy, OUTPUT);
  pinMode(SW, INPUT_PULLUP); 

  //to enable reseting my bluetooth device (so that I don't need to constantly replug my USB)
  digitalWrite(rst,LOW);
  delay(1);
  digitalWrite(rst, HIGH);
  delay(100);

  // setting up the bluetooth device
  delay(100);
  Serial2.print("$$$"); //no line ending
  delay(100);
  Serial2.print("+\r"); //carriage return
  delay(100);
  Serial2.print("SS,C0\r"); //carriage return
  delay(100);
  Serial2.print("C,0,44B7D0642065\r"); //carriage return
  delay(3000);
  
}

// for the potentiometer
int VRx_read = 0;
int VRy_read = 0;

void loop() {
  // reading the potentiometer
  VRx_read = analogRead(VRx);
  VRy_read = analogRead(VRy);
  Serial.print(VRy_read);
  Serial.print(" ");
  Serial.println(VRx_read);

  Serial2.print(VRy_read); // sending the data to the car
  Serial2.print(" ");
  Serial2.println(VRx_read);
//Serial2.println("12 12");

  // button for honking
  if (digitalRead(SW)==LOW){ //when you press the button and make the voltage grounded, it's equal to LOW
  Serial.println(2000);
  Serial2.println(2000);
  }

  // allowing Bluetooth communication
  while (Serial.available()) {      // If anything comes in Serial USB,
    Serial2.write(Serial.read());   // read it and send it out Serial1 (PA14/15)
//    Serial.write(VRx_read);
//    Serial.write(" ");
//    Serial.write(VRy_read);
//
  }

  while (Serial2.available()) {     // If anything comes in Serial1 (PA14/15)
    Serial.write(Serial2.read());   // read it and send it out Serial USBㅡㅡ
  }
  delay(100);

}