Bluetooth control car with 3D Printed Chassis

1/first , you need to insstall the motor driver for L293D motor driver
2// Go to Sketch-> Include Librabry-> Manage Library-> Search for Adafruit Motor Shield V1
3#include <AFMotor.h>
4#include <SoftwareSerial.h>
5
6SoftwareSerial HC05(9, 10); // RX, TX
7
8//initial motors pin
9AF_DCMotor motor1(1);
10AF_DCMotor motor2(2);
11AF_DCMotor motor3(3);
12AF_DCMotor motor4(4);
13
14char command;
15
16void setup()
17{
18  HC05.begin(9600);  //Set the baud rate to your Bluetooth module.
19}
20
21void loop() {
22  if (HC05.available() > 0) {
23    command = HC05.read();
24
25    Stop(); //initialize with motors stoped
26    
27    switch (command) {
28      case 'F':
29        forward();
30        break;
31      case 'B':
32        back();
33        break;
34      case 'L':
35        left();
36        break;
37      case 'R':
38        right();
39        break;
40    }
41  }
42}
43
44void forward()
45{
46  motor1.setSpeed(255); //Define maximum velocity
47  motor1.run(FORWARD);  //rotate the motor clockwise
48  motor2.setSpeed(255); //Define maximum velocity
49  motor2.run(FORWARD);  //rotate the motor clockwise
50  motor3.setSpeed(255); //Define maximum velocity
51  motor3.run(FORWARD);  //rotate the motor clockwise
52  motor4.setSpeed(255); //Define maximum velocity
53  motor4.run(FORWARD);  //rotate the motor clockwise
54}
55
56void back()
57{
58  motor1.setSpeed(255); //Define maximum velocity
59  motor1.run(BACKWARD); //rotate the motor anti-clockwise
60  motor2.setSpeed(255); //Define maximum velocity
61  motor2.run(BACKWARD); //rotate the motor anti-clockwise
62  motor3.setSpeed(255); //Define maximum velocity
63  motor3.run(BACKWARD); //rotate the motor anti-clockwise
64  motor4.setSpeed(255); //Define maximum velocity
65  motor4.run(BACKWARD); //rotate the motor anti-clockwise
66}
67
68void left()
69{
70  motor1.setSpeed(255); //Define maximum velocity
71  motor1.run(FORWARD); //rotate the motor clockwise
72  motor2.setSpeed(50); //Define lower velocity
73  motor2.run(FORWARD); //rotate the motor clockwise
74  motor3.setSpeed(255); //Define maximum velocity
75  motor3.run(FORWARD);  //rotate the motor clockwise
76  motor4.setSpeed(50); // Define lower velocity
77  motor4.run(FORWARD);  //rotate the motor clockwise
78}
79
80void right()
81{
82  motor1.setSpeed(50); //Define lower velocity
83  motor1.run(FORWARD);  //rotate the motor clockwise
84  motor2.setSpeed(255); //Define maximum velocity
85  motor2.run(FORWARD);  //rotate the motor clockwise
86  motor3.setSpeed(50); //Define lower velocity
87  motor3.run(FORWARD); //rotate the motor clockwise
88  motor4.setSpeed(255); //Define maximum velocity
89  motor4.run(FORWARD); //rotate the motor clockwise
90}
91
92void Stop()
93{
94  motor1.setSpeed(0);  //Define minimum velocity
95  motor1.run(RELEASE); //stop the motor when release the button
96  motor2.setSpeed(0);  //Define minimum velocity
97  motor2.run(RELEASE); //rotate the motor clockwise
98  motor3.setSpeed(0);  //Define minimum velocity
99  motor3.run(RELEASE); //stop the motor when release the button
100  motor4.setSpeed(0);  //Define minimum velocity
101  motor4.run(RELEASE); //stop the motor when release the button
102}