Easiest Bluetooth car using Arduino and MIT app inventor

1#include <SoftwareSerial.h>
2SoftwareSerial mySerial(52, 53); // RX  and TX can be edited 
3String BT_input;
4int LED = 13;
5#include <Servo.h>
6Servo  s;
7Servo s2;
8#include <AFMotor.h>
9AF_DCMotor motor(1);
10AF_DCMotor motor1(4);
11void  setup() {
12 Serial.begin(9600);
13 mySerial.begin(9600);
14 s.attach(10);
15  s2.attach(9);
16 s2.write(0);
17 s.write(0);
18 pinMode(LED, OUTPUT);
19 motor.setSpeed(255);
20  motor1.setSpeed(255);
21 motor.run(RELEASE);
22 motor1.run(RELEASE);
23}
24void  loop() {
25 if (mySerial.available())
26   {
27       BT_input = mySerial.read();
28       Serial.println(BT_input);
29       if (BT_input=="1")
30       {
31         front();
32       }
33       if (BT_input=="3")
34       {
35         back();
36       }
37       if (BT_input=="2")
38       {
39         right();
40       }
41       if (BT_input=="4")
42       {
43         left();
44       }
45       if  (BT_input=="5")
46       {
47         stop();
48       }
49       if (BT_input=="6")
50       {
51         shoot();
52       }
53       if (BT_input=="7")
54       {
55         shoot2();
56       }
57   }
58}
59void front(){
60 motor.run(FORWARD);
61  motor1.run(FORWARD);
62}
63void back(){
64 motor.run(BACKWARD);
65 motor1.run(BACKWARD);
66}
67void  left(){
68 motor.run(BACKWARD);
69 motor1.run(FORWARD);
70}
71void right(){
72  motor.run(FORWARD);
73 motor1.run(BACKWARD);
74}
75void stop(){
76 motor.run(RELEASE);
77  motor1.run(RELEASE);
78}
79void shoot(){
80 s.write(120);
81 delay(100);
82  s.write(0);
83}
84void shoot2(){
85 s2.write(120);
86 delay(100);
87 s2.write(0);
88}

1#include <SoftwareSerial.h>
2SoftwareSerial mySerial(52, 53); // RX   and TX can be edited 
3String BT_input;
4int LED = 13;
5#include <Servo.h>
6Servo   s;
7Servo s2;
8
9const int Motor_L_F = 2;
10const int Motor_L_B = 3;
11const   int Motor_R_F = 4;
12const int Motor_R_B = 5;
13void setup() {
14     
15}
16void   loop() {
17 if (mySerial.available())
18   {
19       BT_input = mySerial.read();
20        Serial.println(BT_input);
21       if (BT_input=="1")
22       {
23          front();
24       }
25       if (BT_input=="3")
26       {
27         back();
28        }
29       if (BT_input=="2")
30       {
31         right();
32       }
33        if (BT_input=="4")
34       {
35         left();
36       }
37       if   (BT_input=="5")
38       {
39         stop();
40       }
41       if (BT_input=="6")
42        {
43         shoot();
44       }
45       if (BT_input=="7")
46       {
47          shoot2();
48       }
49   }
50}
51void Forward(){
52 digitalWrite(Motor_L_F,   HIGH);
53 digitalWrite(Motor_L_B, LOW);
54 digitalWrite(Motor_R_F, HIGH);
55   digitalWrite(Motor_R_B, LOW);
56 }
57void Right(){
58 digitalWrite(Motor_R_F,   LOW);
59 digitalWrite(Motor_R_B, HIGH);
60 digitalWrite(Motor_L_F, HIGH);
61   digitalWrite(Motor_L_B, LOW);
62 }
63void Left(){
64 digitalWrite(Motor_L_F,   LOW);
65 digitalWrite(Motor_L_B, HIGH);
66 digitalWrite(Motor_R_F, HIGH);
67   digitalWrite(Motor_R_B, LOW);
68 }
69void Back(){
70 digitalWrite(Motor_L_F,   LOW);
71 digitalWrite(Motor_L_B, HIGH);
72 digitalWrite(Motor_R_F, LOW);
73 digitalWrite(Motor_R_B,   HIGH);
74 }
75void Stop(){
76 digitalWrite(Motor_L_F, LOW);
77 digitalWrite(Motor_L_B,   LOW);
78 digitalWrite(Motor_R_F, LOW);
79 digitalWrite(Motor_R_B, LOW);
80 }
81void   shoot(){
82 s.write(120);
83 delay(100);
84 s.write(0);
85}
86void shoot2(){
87   s2.write(120);
88 delay(100);
89 s2.write(0);
90}

1#include <SoftwareSerial.h>
2SoftwareSerial mySerial(52, 53); // RX   and TX can be edited 
3String BT_input;
4int LED = 13;
5#include <Servo.h>
6Servo   s;
7Servo s2;
8#include <AFMotor.h>
9AF_DCMotor motor(1);
10AF_DCMotor motor1(4);
11void   setup() {
12 Serial.begin(9600);
13 mySerial.begin(9600);
14 s.attach(10);
15   s2.attach(9);
16 s2.write(0);
17 s.write(0);
18 pinMode(LED, OUTPUT);
19 motor.setSpeed(255);
20   motor1.setSpeed(255);
21 motor.run(RELEASE);
22 motor1.run(RELEASE);
23}
24void   loop() {
25 if (mySerial.available())
26   {
27       BT_input = mySerial.read();
28        Serial.println(BT_input);
29       if (BT_input=="1")
30       {
31          front();
32       }
33       if (BT_input=="3")
34       {
35         back();
36        }
37       if (BT_input=="2")
38       {
39         right();
40       }
41        if (BT_input=="4")
42       {
43         left();
44       }
45       if   (BT_input=="5")
46       {
47         stop();
48       }
49       if (BT_input=="6")
50        {
51         shoot();
52       }
53       if (BT_input=="7")
54       {
55          shoot2();
56       }
57   }
58}
59void front(){
60 motor.run(FORWARD);
61   motor1.run(FORWARD);
62}
63void back(){
64 motor.run(BACKWARD);
65 motor1.run(BACKWARD);
66}
67void   left(){
68 motor.run(BACKWARD);
69 motor1.run(FORWARD);
70}
71void right(){
72   motor.run(FORWARD);
73 motor1.run(BACKWARD);
74}
75void stop(){
76 motor.run(RELEASE);
77   motor1.run(RELEASE);
78}
79void shoot(){
80 s.write(120);
81 delay(100);
82   s.write(0);
83}
84void shoot2(){
85 s2.write(120);
86 delay(100);
87 s2.write(0);
88}

1#include <SoftwareSerial.h>
2SoftwareSerial mySerial(52, 53); // RX
3  and TX can be edited 
4String BT_input;
5int LED = 13;
6#include <Servo.h>
7Servo
8  s;
9Servo s2;
10
11const int Motor_L_F = 2;
12const int Motor_L_B = 3;
13const
14  int Motor_R_F = 4;
15const int Motor_R_B = 5;
16void setup() {
17     
18}
19void
20  loop() {
21 if (mySerial.available())
22   {
23       BT_input = mySerial.read();
24
25       Serial.println(BT_input);
26       if (BT_input=="1")
27       {
28
29         front();
30       }
31       if (BT_input=="3")
32       {
33         back();
34
35       }
36       if (BT_input=="2")
37       {
38         right();
39       }
40
41       if (BT_input=="4")
42       {
43         left();
44       }
45       if
46  (BT_input=="5")
47       {
48         stop();
49       }
50       if (BT_input=="6")
51
52       {
53         shoot();
54       }
55       if (BT_input=="7")
56       {
57
58         shoot2();
59       }
60   }
61}
62void Forward(){
63 digitalWrite(Motor_L_F,
64  HIGH);
65 digitalWrite(Motor_L_B, LOW);
66 digitalWrite(Motor_R_F, HIGH);
67
68  digitalWrite(Motor_R_B, LOW);
69 }
70void Right(){
71 digitalWrite(Motor_R_F,
72  LOW);
73 digitalWrite(Motor_R_B, HIGH);
74 digitalWrite(Motor_L_F, HIGH);
75
76  digitalWrite(Motor_L_B, LOW);
77 }
78void Left(){
79 digitalWrite(Motor_L_F,
80  LOW);
81 digitalWrite(Motor_L_B, HIGH);
82 digitalWrite(Motor_R_F, HIGH);
83
84  digitalWrite(Motor_R_B, LOW);
85 }
86void Back(){
87 digitalWrite(Motor_L_F,
88  LOW);
89 digitalWrite(Motor_L_B, HIGH);
90 digitalWrite(Motor_R_F, LOW);
91 digitalWrite(Motor_R_B,
92  HIGH);
93 }
94void Stop(){
95 digitalWrite(Motor_L_F, LOW);
96 digitalWrite(Motor_L_B,
97  LOW);
98 digitalWrite(Motor_R_F, LOW);
99 digitalWrite(Motor_R_B, LOW);
100 }
101void
102  shoot(){
103 s.write(120);
104 delay(100);
105 s.write(0);
106}
107void shoot2(){
108
109  s2.write(120);
110 delay(100);
111 s2.write(0);
112}