Bluetooth control of Rodeo robot

bluetoothRode.ino

//Robolink Rodeo robot bluetooth control.
//Arduino Bluetooth RC Car app: https://play.google.com/store/apps/details?id=braulio.calle.bluetoothRCcontroller&hl=en
//Robot purchase link: https://www.robolinkmarket.com/arama?q=rodeo
#include <SoftwareSerial.h> 
SoftwareSerial myBlue(0, 1); // RX, TX pins of Arduino Nano.

const int motorLeftDir = 2;  //motorLeft: m1
const int motorRightDir = 7; //motorRight: m2
const int motorLeftEn = 5;
const int motorRightEn = 6;
int speed = 100;

void setup() {
  pinMode(motorLeftDir, OUTPUT);
  pinMode(motorRightDir, OUTPUT);
  pinMode(motorLeftEn, OUTPUT);
  pinMode(motorRightEn, OUTPUT);
  myBlue.begin(9600);
  Serial.begin(9600); //Note that this value has to be the same as blutooth value
}

void stop() {
  digitalWrite(motorLeftDir, LOW);
  analogWrite(motorLeftEn, 0);
  digitalWrite(motorRightDir, LOW);
  analogWrite(motorRightEn, 0);
}

void moveForward() {
  digitalWrite(motorLeftDir, HIGH);
  analogWrite(motorLeftEn, speed);
  digitalWrite(motorRightDir, HIGH);
  analogWrite(motorRightEn, speed);
}

void moveBackward() {
  digitalWrite(motorLeftDir, LOW);
  analogWrite(motorLeftEn, speed);
  digitalWrite(motorRightDir, LOW);
  analogWrite(motorRightEn, speed);
}

void turnRight() {
  digitalWrite(motorLeftDir, HIGH);
  analogWrite(motorLeftEn, speed);
  digitalWrite(motorRightDir, HIGH);
  analogWrite(motorRightEn, 0);
}

void turnLeft() {
  digitalWrite(motorLeftDir, HIGH);
  analogWrite(motorLeftEn, 0);
  digitalWrite(motorRightDir, HIGH);
  analogWrite(motorRightEn, speed);
}

void loop() {
  if(myBlue.available() > 0) {
    char val = myBlue.read();
    Serial.print(val);
    Serial.print("\n");
    if('F' == val) {
      moveForward();
      Serial.println("moveForward.");
    } else if('B' == val) {
      moveBackward();
      Serial.println("moveBackward.");
    } else if('R' == val) {
      turnRight();
      Serial.println("turnRight.");
    } else if('L' == val) {
      turnLeft();
      Serial.println("turnLeft.");
    } else if('+' == val) {
      speed += 10;
      Serial.println("speed +");
    } else if('-' == val) {
      speed -= 10;
      Serial.println("speed -");
    } else if('S' == val) {
      stop();
      Serial.println("stop.");
    }
  }
  delay(10);
}