Banger BLE Car

1#include <SoftwareSerial.h>
2char data = 0;
3void setup() {
4  Serial.begin(9600);         //Sets the data rate in bits per second (baud) for serial data transmission
5
6  // Impostazione canale A
7  pinMode(2, OUTPUT); // initialize direction pin  (motor A)
8  pinMode(3, OUTPUT);  // initialize brake pin (motor A)
9
10  //  Impostazione canale B
11  pinMode(4, OUTPUT); // initialize direction pin (motor  B)
12  pinMode(5, OUTPUT);  // initialize brake pin (motor B)
13}
14
15void  loop() {
16  if (Serial.available() > 0) // Send data only when you receive data:
17  {
18    data = Serial.read();      //Read the incoming data and store it into  variable data
19    Serial.print(data);        //Print Value inside data in Serial  monitor
20    Serial.print("\
21");        //New line
22    switch (data) {
23      case '1':
24        // Motor A
25        digitalWrite(2, HIGH);   // set  forward direction (motor A)
26        digitalWrite(3, LOW);    // disactivate brake  pin (motor A)
27        analogWrite(6, 255);     // set max speed (motor A)
28        // Motor B 
29        digitalWrite(4, HIGH);   // set forward direction  (motor B)
30        digitalWrite(5, LOW);    // disactivate brake pin (motor B)
31        analogWrite(9, 255);     //set max speed (motor B)
32      case '2':
33        // Motor A
34        digitalWrite(2, HIGH);  // set forward direction (motor  A)
35        digitalWrite(3, LOW);   // disactivate brake pin (motor A)
36        analogWrite(6,  0);      //set min speed (motor A)
37        // Motor B
38        digitalWrite(4,  LOW);    // set backward direction (motor B)
39        digitalWrite(5, LOW);    //  disactivate brake pin (motor B)
40        analogWrite(9, 0);       //set min speed  (motor B)
41        break;
42      case '3':
43        // Motor A
44        digitalWrite(2,  HIGH);   // set forward direction (motor A)
45        digitalWrite(3, LOW);    //  disactivate brake pin (motor A)
46        analogWrite(6, 255);     //set max speed  (motor A)
47        // Motor B
48        digitalWrite(4, HIGH);   // set forward  direction (motor B)
49        digitalWrite(5, LOW);    // disactivate brake pin  (motor B)  
50        analogWrite(9, 127);     //set half speed (motor B)
51        break;
52      case '4':
53        // Motor A
54        digitalWrite(2, HIGH);    // set  forward direction (motor A)
55        digitalWrite(3, LOW);     // disactivate  brake pin (motor A)
56        analogWrite(6, 127);      //set half speed (motor  A)
57        // Motor B
58        digitalWrite(4, HIGH);   // set forward direction  (motor B)
59        digitalWrite(5, LOW);    // disactivate brake pin (motor B)  
60        analogWrite(9, 255);     //set max speed (motor B)
61        break;
62    }
63  }
64}