Android App for Garden Train

Control the trains of your railway from your phone. Switching between trains by simply changing Bluetooth connections.

Jul 18, 2019

•

4577 views

•

7 respects

toys

passenger vehicles

garden

Components and supplies

Dual H-Bridge motor drivers L298

HC-06 Bluetooth Module

Arduino Nano R3

Apps and platforms

Arduino Train Garden

Arduino IDE

Project description

Code

Sketch for Garden Train

arduino

Simple example

1//--------------------------------------//
2//   # WWW.ARDUINORAILWAYCONTROL.COM     //
3//                                      //
4//   ARDUINO GARDEN APP   | SECOND SKETCH //
5//                                      //
6//   V.1.2019   Steve Massikker          //
7//--------------------------------------//
8
9void(*   resetFunc) (void) = 0; // RESET FUNCTION
10#include <SoftwareSerial.h>
11
12//   SOFTWARE SERIAL
13SoftwareSerial Bluetooth(12, 13); // RX, TX
14
15// L298
16#define   L298_ENA 9
17#define L298_IN1 10
18#define L298_IN2 11
19
20// LEDs
21#define   FF_LED 3 // Forward Floodlight white LED
22#define BF_LED 4 // Backward Floodlight   white LED
23#define FRR_LED 5 // Forward Rear Right red signal LED
24#define FRL_LED   6 // Forward Rear Left red signal LED
25#define BRR_LED 7 // Backward Rear Right   red signal LED
26#define BRL_LED 8 // Backward Rear Left red signal LED
27
28//   VARIABLES //
29bool stringComplete = false;
30String inputString = ""; 
31//                      1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16   17  18  19  20
32byte speedArray [] = {40, 50, 60, 70, 80, 90,100,110,120,130,140,150,160,170,180,190,200,220,240,255};
33byte   speedTrain = 0;
34bool forwardMovingTrain;
35
36void setup() {
37
38// Initializing   Serial
39  Bluetooth.begin(9600);
40  Serial.begin(9600);  
41  inputString.reserve(4);   
42
43// Initializing Motor-Driver
44  pinMode(L298_ENA, OUTPUT); 
45  pinMode(L298_IN1,   OUTPUT); 
46  pinMode(L298_IN2, OUTPUT);
47
48// Initializing LEDs  
49  pinMode(FF_LED,   OUTPUT); 
50  pinMode(BF_LED, OUTPUT); 
51  pinMode(FRR_LED, OUTPUT);
52  pinMode(FRL_LED,   OUTPUT); 
53  pinMode(BRR_LED, OUTPUT); 
54  pinMode(BRL_LED, OUTPUT);  
55
56//   Blinking all LEDs
57  digitalWrite(FF_LED, HIGH); 
58  digitalWrite(BF_LED, HIGH);   
59  delay(100);
60  digitalWrite(FRR_LED, HIGH); 
61  digitalWrite(FRL_LED,   HIGH); 
62  digitalWrite(BRR_LED, HIGH); 
63  digitalWrite(BRL_LED, HIGH); 
64   delay(150);
65  digitalWrite(FF_LED, LOW); 
66  digitalWrite(BF_LED, LOW); 
67   digitalWrite(FRR_LED, LOW); 
68  digitalWrite(FRL_LED, LOW); 
69  digitalWrite(BRR_LED,   LOW); 
70  digitalWrite(BRL_LED, LOW); 
71
72}
73
74void loop() {
75
76//   ---- START PARSING INCOMING APP COMMANDS
77  if (stringComplete) {
78
79    if   (inputString =="999") resetFunc(); // RESET AFTER BT CONNECTION 
80
81    //   Train control
82    if (inputString.charAt(0) =='a') {
83
84      // Speed 
85       if (inputString.charAt(1) =='0') {
86        if (inputString.charAt(2) =='0')   speedTrain = 0;
87        if (inputString.charAt(2) =='1') speedTrain = speedArray[0];
88         if (inputString.charAt(2) =='2') speedTrain = speedArray[1];
89        if   (inputString.charAt(2) =='3') speedTrain = speedArray[2];
90        if (inputString.charAt(2)   =='4') speedTrain = speedArray[3];
91        if (inputString.charAt(2) =='5') speedTrain   = speedArray[4];
92        if (inputString.charAt(2) =='6') speedTrain = speedArray[5];
93         if (inputString.charAt(2) =='7') speedTrain = speedArray[6];
94        if   (inputString.charAt(2) =='8') speedTrain = speedArray[7];
95        if (inputString.charAt(2)   =='9') speedTrain = speedArray[8]; 
96      } 
97      if (inputString.charAt(1)   =='1') {
98        if (inputString.charAt(2) =='0') speedTrain = speedArray[9];
99         if (inputString.charAt(2) =='1') speedTrain = speedArray[10];
100        if   (inputString.charAt(2) =='2') speedTrain = speedArray[11];
101        if (inputString.charAt(2)   =='3') speedTrain = speedArray[12];
102        if (inputString.charAt(2) =='4')   speedTrain = speedArray[13];
103        if (inputString.charAt(2) =='5') speedTrain   = speedArray[14];
104        if (inputString.charAt(2) =='6') speedTrain = speedArray[15];
105         if (inputString.charAt(2) =='7') speedTrain = speedArray[16];
106        if   (inputString.charAt(2) =='8') speedTrain = speedArray[17];
107        if (inputString.charAt(2)   =='9') speedTrain = speedArray[18]; 
108      }
109      if (inputString.charAt(1)   =='2') {      
110        if (inputString.charAt(2) =='0') speedTrain = speedArray[19];
111       }  
112
113      // Direction and Stop
114      if (inputString.charAt(1)   =='d') {
115        if (inputString.charAt(2) =='f') { // (f) Forward
116          digitalWrite(L298_IN1,   HIGH);
117          digitalWrite(L298_IN2, LOW);
118          forwardMovingTrain   = true;
119        }
120        if (inputString.charAt(2) =='b') { // (b) Backward
121           digitalWrite(L298_IN1, LOW);
122          digitalWrite(L298_IN2, HIGH);
123           forwardMovingTrain = false;
124        }
125        if (inputString.charAt(2)   =='s') { // (s) Stop button
126          digitalWrite(L298_IN1, LOW);
127          digitalWrite(L298_IN2,   LOW);
128          speedTrain = 0;
129        } 
130      }
131      analogWrite(L298_ENA,   speedTrain); // Throttle
132    }
133
134    // LEDs control
135    if (inputString.charAt(0)   =='l') { 
136      // Forward Floodlight white LED
137      if (inputString.charAt(1)   =='f') { 
138        if (inputString.charAt(2) =='0') digitalWrite(FF_LED, LOW);
139         if (inputString.charAt(2) =='1') digitalWrite(FF_LED, HIGH);          
140       }  
141      // Backward Floodlight white LED
142      if (inputString.charAt(1)   =='b') { 
143        if (inputString.charAt(2) =='0') digitalWrite(BF_LED, LOW);
144         if (inputString.charAt(2) =='1') digitalWrite(BF_LED, HIGH);          
145       }
146      // Rear red LEDs
147      if (inputString.charAt(1) =='r') { 
148         if (inputString.charAt(2) =='0') {
149          digitalWrite(FRR_LED, LOW);   
150          digitalWrite(FRL_LED, LOW); 
151          digitalWrite(BRR_LED, LOW);   
152          digitalWrite(BRL_LED, LOW);             
153        }
154        if   (inputString.charAt(2) =='1') {
155          if (forwardMovingTrain) {
156            digitalWrite(FRR_LED,   LOW); 
157            digitalWrite(FRL_LED, LOW); 
158            digitalWrite(BRR_LED,   HIGH); 
159            digitalWrite(BRL_LED, HIGH);               
160          }
161           else {
162            digitalWrite(FRR_LED, HIGH); 
163            digitalWrite(FRL_LED,   HIGH); 
164            digitalWrite(BRR_LED, LOW); 
165            digitalWrite(BRL_LED,   LOW);                
166          }
167        }  
168      }  
169
170      if   (inputString.charAt(1) =='0') { 
171        digitalWrite(FF_LED, LOW);
172        digitalWrite(BF_LED,   LOW); 
173        digitalWrite(FRR_LED, LOW); 
174        digitalWrite(FRL_LED,   LOW); 
175        digitalWrite(BRR_LED, LOW); 
176        digitalWrite(BRL_LED,   LOW); 
177      }       
178    }  
179    
180    Serial.println(inputString);   
181    inputString = "";
182    stringComplete = false;
183  }
184
185  bluetoothEvent();
186}
187
188
189////   FUNCTIONS ////
190
191void bluetoothEvent() {
192  if (Bluetooth.available()) {
193     char inChar = (char)Bluetooth.read();
194    inputString += inChar;
195    if   (inChar == 'z') {
196      stringComplete = true;
197    }
198  }
199}

//--------------------------------------//
//   # WWW.ARDUINORAILWAYCONTROL.COM     //
//                                      //
//   ARDUINO GARDEN APP   | SECOND SKETCH //
//                                      //
//   V.1.2019   Steve Massikker          //
//--------------------------------------//

void(*   resetFunc) (void) = 0; // RESET FUNCTION
#include <SoftwareSerial.h>

//   SOFTWARE SERIAL
SoftwareSerial Bluetooth(12, 13); // RX, TX

// L298
#define   L298_ENA 9
#define L298_IN1 10
#define L298_IN2 11

// LEDs
#define   FF_LED 3 // Forward Floodlight white LED
#define BF_LED 4 // Backward Floodlight   white LED
#define FRR_LED 5 // Forward Rear Right red signal LED
#define FRL_LED   6 // Forward Rear Left red signal LED
#define BRR_LED 7 // Backward Rear Right   red signal LED
#define BRL_LED 8 // Backward Rear Left red signal LED

//   VARIABLES //
bool stringComplete = false;
String inputString = ""; 
//                      1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16   17  18  19  20
byte speedArray [] = {40, 50, 60, 70, 80, 90,100,110,120,130,140,150,160,170,180,190,200,220,240,255};
byte   speedTrain = 0;
bool forwardMovingTrain;

void setup() {

// Initializing   Serial
  Bluetooth.begin(9600);
  Serial.begin(9600);  
  inputString.reserve(4);   

// Initializing Motor-Driver
  pinMode(L298_ENA, OUTPUT); 
  pinMode(L298_IN1,   OUTPUT); 
  pinMode(L298_IN2, OUTPUT);

// Initializing LEDs  
  pinMode(FF_LED,   OUTPUT); 
  pinMode(BF_LED, OUTPUT); 
  pinMode(FRR_LED, OUTPUT);
  pinMode(FRL_LED,   OUTPUT); 
  pinMode(BRR_LED, OUTPUT); 
  pinMode(BRL_LED, OUTPUT);  

//   Blinking all LEDs
  digitalWrite(FF_LED, HIGH); 
  digitalWrite(BF_LED, HIGH);   
  delay(100);
  digitalWrite(FRR_LED, HIGH); 
  digitalWrite(FRL_LED,   HIGH); 
  digitalWrite(BRR_LED, HIGH); 
  digitalWrite(BRL_LED, HIGH); 
   delay(150);
  digitalWrite(FF_LED, LOW); 
  digitalWrite(BF_LED, LOW); 
   digitalWrite(FRR_LED, LOW); 
  digitalWrite(FRL_LED, LOW); 
  digitalWrite(BRR_LED,   LOW); 
  digitalWrite(BRL_LED, LOW); 

}

void loop() {

//   ---- START PARSING INCOMING APP COMMANDS
  if (stringComplete) {

    if   (inputString =="999") resetFunc(); // RESET AFTER BT CONNECTION 

    //   Train control
    if (inputString.charAt(0) =='a') {

      // Speed 
       if (inputString.charAt(1) =='0') {
        if (inputString.charAt(2) =='0')   speedTrain = 0;
        if (inputString.charAt(2) =='1') speedTrain = speedArray[0];
         if (inputString.charAt(2) =='2') speedTrain = speedArray[1];
        if   (inputString.charAt(2) =='3') speedTrain = speedArray[2];
        if (inputString.charAt(2)   =='4') speedTrain = speedArray[3];
        if (inputString.charAt(2) =='5') speedTrain   = speedArray[4];
        if (inputString.charAt(2) =='6') speedTrain = speedArray[5];
         if (inputString.charAt(2) =='7') speedTrain = speedArray[6];
        if   (inputString.charAt(2) =='8') speedTrain = speedArray[7];
        if (inputString.charAt(2)   =='9') speedTrain = speedArray[8]; 
      } 
      if (inputString.charAt(1)   =='1') {
        if (inputString.charAt(2) =='0') speedTrain = speedArray[9];
         if (inputString.charAt(2) =='1') speedTrain = speedArray[10];
        if   (inputString.charAt(2) =='2') speedTrain = speedArray[11];
        if (inputString.charAt(2)   =='3') speedTrain = speedArray[12];
        if (inputString.charAt(2) =='4')   speedTrain = speedArray[13];
        if (inputString.charAt(2) =='5') speedTrain   = speedArray[14];
        if (inputString.charAt(2) =='6') speedTrain = speedArray[15];
         if (inputString.charAt(2) =='7') speedTrain = speedArray[16];
        if   (inputString.charAt(2) =='8') speedTrain = speedArray[17];
        if (inputString.charAt(2)   =='9') speedTrain = speedArray[18]; 
      }
      if (inputString.charAt(1)   =='2') {      
        if (inputString.charAt(2) =='0') speedTrain = speedArray[19];
       }  

      // Direction and Stop
      if (inputString.charAt(1)   =='d') {
        if (inputString.charAt(2) =='f') { // (f) Forward
          digitalWrite(L298_IN1,   HIGH);
          digitalWrite(L298_IN2, LOW);
          forwardMovingTrain   = true;
        }
        if (inputString.charAt(2) =='b') { // (b) Backward
           digitalWrite(L298_IN1, LOW);
          digitalWrite(L298_IN2, HIGH);
           forwardMovingTrain = false;
        }
        if (inputString.charAt(2)   =='s') { // (s) Stop button
          digitalWrite(L298_IN1, LOW);
          digitalWrite(L298_IN2,   LOW);
          speedTrain = 0;
        } 
      }
      analogWrite(L298_ENA,   speedTrain); // Throttle
    }

    // LEDs control
    if (inputString.charAt(0)   =='l') { 
      // Forward Floodlight white LED
      if (inputString.charAt(1)   =='f') { 
        if (inputString.charAt(2) =='0') digitalWrite(FF_LED, LOW);
         if (inputString.charAt(2) =='1') digitalWrite(FF_LED, HIGH);          
       }  
      // Backward Floodlight white LED
      if (inputString.charAt(1)   =='b') { 
        if (inputString.charAt(2) =='0') digitalWrite(BF_LED, LOW);
         if (inputString.charAt(2) =='1') digitalWrite(BF_LED, HIGH);          
       }
      // Rear red LEDs
      if (inputString.charAt(1) =='r') { 
         if (inputString.charAt(2) =='0') {
          digitalWrite(FRR_LED, LOW);   
          digitalWrite(FRL_LED, LOW); 
          digitalWrite(BRR_LED, LOW);   
          digitalWrite(BRL_LED, LOW);             
        }
        if   (inputString.charAt(2) =='1') {
          if (forwardMovingTrain) {
            digitalWrite(FRR_LED,   LOW); 
            digitalWrite(FRL_LED, LOW); 
            digitalWrite(BRR_LED,   HIGH); 
            digitalWrite(BRL_LED, HIGH);               
          }
           else {
            digitalWrite(FRR_LED, HIGH); 
            digitalWrite(FRL_LED,   HIGH); 
            digitalWrite(BRR_LED, LOW); 
            digitalWrite(BRL_LED,   LOW);                
          }
        }  
      }  

      if   (inputString.charAt(1) =='0') { 
        digitalWrite(FF_LED, LOW);
        digitalWrite(BF_LED,   LOW); 
        digitalWrite(FRR_LED, LOW); 
        digitalWrite(FRL_LED,   LOW); 
        digitalWrite(BRR_LED, LOW); 
        digitalWrite(BRL_LED,   LOW); 
      }       
    }  
    
    Serial.println(inputString);   
    inputString = "";
    stringComplete = false;
  }

  bluetoothEvent();
}


////   FUNCTIONS ////

void bluetoothEvent() {
  if (Bluetooth.available()) {
     char inChar = (char)Bluetooth.read();
    inputString += inChar;
    if   (inChar == 'z') {
      stringComplete = true;
    }
  }
}

Sketch for Garden Train

arduino

Simple example

1//--------------------------------------//
2//   # WWW.ARDUINORAILWAYCONTROL.COM    //
3//                                      //
4//   ARDUINO GARDEN APP  | SECOND SKETCH //
5//                                      //
6//   V.1.2019  Steve Massikker          //
7//--------------------------------------//
8
9void(*  resetFunc) (void) = 0; // RESET FUNCTION
10#include <SoftwareSerial.h>
11
12//  SOFTWARE SERIAL
13SoftwareSerial Bluetooth(12, 13); // RX, TX
14
15// L298
16#define  L298_ENA 9
17#define L298_IN1 10
18#define L298_IN2 11
19
20// LEDs
21#define  FF_LED 3 // Forward Floodlight white LED
22#define BF_LED 4 // Backward Floodlight  white LED
23#define FRR_LED 5 // Forward Rear Right red signal LED
24#define FRL_LED  6 // Forward Rear Left red signal LED
25#define BRR_LED 7 // Backward Rear Right  red signal LED
26#define BRL_LED 8 // Backward Rear Left red signal LED
27
28//  VARIABLES //
29bool stringComplete = false;
30String inputString = ""; 
31//                     1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20
32byte speedArray [] = {40, 50, 60, 70, 80, 90,100,110,120,130,140,150,160,170,180,190,200,220,240,255};
33byte  speedTrain = 0;
34bool forwardMovingTrain;
35
36void setup() {
37
38// Initializing  Serial
39  Bluetooth.begin(9600);
40  Serial.begin(9600);  
41  inputString.reserve(4);  
42
43// Initializing Motor-Driver
44  pinMode(L298_ENA, OUTPUT); 
45  pinMode(L298_IN1,  OUTPUT); 
46  pinMode(L298_IN2, OUTPUT);
47
48// Initializing LEDs  
49  pinMode(FF_LED,  OUTPUT); 
50  pinMode(BF_LED, OUTPUT); 
51  pinMode(FRR_LED, OUTPUT);
52  pinMode(FRL_LED,  OUTPUT); 
53  pinMode(BRR_LED, OUTPUT); 
54  pinMode(BRL_LED, OUTPUT);  
55
56//  Blinking all LEDs
57  digitalWrite(FF_LED, HIGH); 
58  digitalWrite(BF_LED, HIGH);  
59  delay(100);
60  digitalWrite(FRR_LED, HIGH); 
61  digitalWrite(FRL_LED,  HIGH); 
62  digitalWrite(BRR_LED, HIGH); 
63  digitalWrite(BRL_LED, HIGH); 
64  delay(150);
65  digitalWrite(FF_LED, LOW); 
66  digitalWrite(BF_LED, LOW); 
67  digitalWrite(FRR_LED, LOW); 
68  digitalWrite(FRL_LED, LOW); 
69  digitalWrite(BRR_LED,  LOW); 
70  digitalWrite(BRL_LED, LOW); 
71
72}
73
74void loop() {
75
76//  ---- START PARSING INCOMING APP COMMANDS
77  if (stringComplete) {
78
79    if  (inputString =="999") resetFunc(); // RESET AFTER BT CONNECTION 
80
81    //  Train control
82    if (inputString.charAt(0) =='a') {
83
84      // Speed 
85      if (inputString.charAt(1) =='0') {
86        if (inputString.charAt(2) =='0')  speedTrain = 0;
87        if (inputString.charAt(2) =='1') speedTrain = speedArray[0];
88        if (inputString.charAt(2) =='2') speedTrain = speedArray[1];
89        if  (inputString.charAt(2) =='3') speedTrain = speedArray[2];
90        if (inputString.charAt(2)  =='4') speedTrain = speedArray[3];
91        if (inputString.charAt(2) =='5') speedTrain  = speedArray[4];
92        if (inputString.charAt(2) =='6') speedTrain = speedArray[5];
93        if (inputString.charAt(2) =='7') speedTrain = speedArray[6];
94        if  (inputString.charAt(2) =='8') speedTrain = speedArray[7];
95        if (inputString.charAt(2)  =='9') speedTrain = speedArray[8]; 
96      } 
97      if (inputString.charAt(1)  =='1') {
98        if (inputString.charAt(2) =='0') speedTrain = speedArray[9];
99        if (inputString.charAt(2) =='1') speedTrain = speedArray[10];
100        if  (inputString.charAt(2) =='2') speedTrain = speedArray[11];
101        if (inputString.charAt(2)  =='3') speedTrain = speedArray[12];
102        if (inputString.charAt(2) =='4')  speedTrain = speedArray[13];
103        if (inputString.charAt(2) =='5') speedTrain  = speedArray[14];
104        if (inputString.charAt(2) =='6') speedTrain = speedArray[15];
105        if (inputString.charAt(2) =='7') speedTrain = speedArray[16];
106        if  (inputString.charAt(2) =='8') speedTrain = speedArray[17];
107        if (inputString.charAt(2)  =='9') speedTrain = speedArray[18]; 
108      }
109      if (inputString.charAt(1)  =='2') {      
110        if (inputString.charAt(2) =='0') speedTrain = speedArray[19];
111      }  
112
113      // Direction and Stop
114      if (inputString.charAt(1)  =='d') {
115        if (inputString.charAt(2) =='f') { // (f) Forward
116          digitalWrite(L298_IN1,  HIGH);
117          digitalWrite(L298_IN2, LOW);
118          forwardMovingTrain  = true;
119        }
120        if (inputString.charAt(2) =='b') { // (b) Backward
121          digitalWrite(L298_IN1, LOW);
122          digitalWrite(L298_IN2, HIGH);
123          forwardMovingTrain = false;
124        }
125        if (inputString.charAt(2)  =='s') { // (s) Stop button
126          digitalWrite(L298_IN1, LOW);
127          digitalWrite(L298_IN2,  LOW);
128          speedTrain = 0;
129        } 
130      }
131      analogWrite(L298_ENA,  speedTrain); // Throttle
132    }
133
134    // LEDs control
135    if (inputString.charAt(0)  =='l') { 
136      // Forward Floodlight white LED
137      if (inputString.charAt(1)  =='f') { 
138        if (inputString.charAt(2) =='0') digitalWrite(FF_LED, LOW);
139        if (inputString.charAt(2) =='1') digitalWrite(FF_LED, HIGH);          
140      }  
141      // Backward Floodlight white LED
142      if (inputString.charAt(1)  =='b') { 
143        if (inputString.charAt(2) =='0') digitalWrite(BF_LED, LOW);
144        if (inputString.charAt(2) =='1') digitalWrite(BF_LED, HIGH);          
145      }
146      // Rear red LEDs
147      if (inputString.charAt(1) =='r') { 
148        if (inputString.charAt(2) =='0') {
149          digitalWrite(FRR_LED, LOW);  
150          digitalWrite(FRL_LED, LOW); 
151          digitalWrite(BRR_LED, LOW);  
152          digitalWrite(BRL_LED, LOW);             
153        }
154        if  (inputString.charAt(2) =='1') {
155          if (forwardMovingTrain) {
156            digitalWrite(FRR_LED,  LOW); 
157            digitalWrite(FRL_LED, LOW); 
158            digitalWrite(BRR_LED,  HIGH); 
159            digitalWrite(BRL_LED, HIGH);               
160          }
161          else {
162            digitalWrite(FRR_LED, HIGH); 
163            digitalWrite(FRL_LED,  HIGH); 
164            digitalWrite(BRR_LED, LOW); 
165            digitalWrite(BRL_LED,  LOW);                
166          }
167        }  
168      }  
169
170      if  (inputString.charAt(1) =='0') { 
171        digitalWrite(FF_LED, LOW);
172        digitalWrite(BF_LED,  LOW); 
173        digitalWrite(FRR_LED, LOW); 
174        digitalWrite(FRL_LED,  LOW); 
175        digitalWrite(BRR_LED, LOW); 
176        digitalWrite(BRL_LED,  LOW); 
177      }       
178    }  
179    
180    Serial.println(inputString);  
181    inputString = "";
182    stringComplete = false;
183  }
184
185  bluetoothEvent();
186}
187
188
189////  FUNCTIONS ////
190
191void bluetoothEvent() {
192  if (Bluetooth.available()) {
193    char inChar = (char)Bluetooth.read();
194    inputString += inChar;
195    if  (inChar == 'z') {
196      stringComplete = true;
197    }
198  }
199}

//--------------------------------------//
//   # WWW.ARDUINORAILWAYCONTROL.COM    //
//                                      //
//   ARDUINO GARDEN APP  | SECOND SKETCH //
//                                      //
//   V.1.2019  Steve Massikker          //
//--------------------------------------//

void(*  resetFunc) (void) = 0; // RESET FUNCTION
#include <SoftwareSerial.h>

//  SOFTWARE SERIAL
SoftwareSerial Bluetooth(12, 13); // RX, TX

// L298
#define  L298_ENA 9
#define L298_IN1 10
#define L298_IN2 11

// LEDs
#define  FF_LED 3 // Forward Floodlight white LED
#define BF_LED 4 // Backward Floodlight  white LED
#define FRR_LED 5 // Forward Rear Right red signal LED
#define FRL_LED  6 // Forward Rear Left red signal LED
#define BRR_LED 7 // Backward Rear Right  red signal LED
#define BRL_LED 8 // Backward Rear Left red signal LED

//  VARIABLES //
bool stringComplete = false;
String inputString = ""; 
//                     1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20
byte speedArray [] = {40, 50, 60, 70, 80, 90,100,110,120,130,140,150,160,170,180,190,200,220,240,255};
byte  speedTrain = 0;
bool forwardMovingTrain;

void setup() {

// Initializing  Serial
  Bluetooth.begin(9600);
  Serial.begin(9600);  
  inputString.reserve(4);  

// Initializing Motor-Driver
  pinMode(L298_ENA, OUTPUT); 
  pinMode(L298_IN1,  OUTPUT); 
  pinMode(L298_IN2, OUTPUT);

// Initializing LEDs  
  pinMode(FF_LED,  OUTPUT); 
  pinMode(BF_LED, OUTPUT); 
  pinMode(FRR_LED, OUTPUT);
  pinMode(FRL_LED,  OUTPUT); 
  pinMode(BRR_LED, OUTPUT); 
  pinMode(BRL_LED, OUTPUT);  

//  Blinking all LEDs
  digitalWrite(FF_LED, HIGH); 
  digitalWrite(BF_LED, HIGH);  
  delay(100);
  digitalWrite(FRR_LED, HIGH); 
  digitalWrite(FRL_LED,  HIGH); 
  digitalWrite(BRR_LED, HIGH); 
  digitalWrite(BRL_LED, HIGH); 
  delay(150);
  digitalWrite(FF_LED, LOW); 
  digitalWrite(BF_LED, LOW); 
  digitalWrite(FRR_LED, LOW); 
  digitalWrite(FRL_LED, LOW); 
  digitalWrite(BRR_LED,  LOW); 
  digitalWrite(BRL_LED, LOW); 

}

void loop() {

//  ---- START PARSING INCOMING APP COMMANDS
  if (stringComplete) {

    if  (inputString =="999") resetFunc(); // RESET AFTER BT CONNECTION 

    //  Train control
    if (inputString.charAt(0) =='a') {

      // Speed 
      if (inputString.charAt(1) =='0') {
        if (inputString.charAt(2) =='0')  speedTrain = 0;
        if (inputString.charAt(2) =='1') speedTrain = speedArray[0];
        if (inputString.charAt(2) =='2') speedTrain = speedArray[1];
        if  (inputString.charAt(2) =='3') speedTrain = speedArray[2];
        if (inputString.charAt(2)  =='4') speedTrain = speedArray[3];
        if (inputString.charAt(2) =='5') speedTrain  = speedArray[4];
        if (inputString.charAt(2) =='6') speedTrain = speedArray[5];
        if (inputString.charAt(2) =='7') speedTrain = speedArray[6];
        if  (inputString.charAt(2) =='8') speedTrain = speedArray[7];
        if (inputString.charAt(2)  =='9') speedTrain = speedArray[8]; 
      } 
      if (inputString.charAt(1)  =='1') {
        if (inputString.charAt(2) =='0') speedTrain = speedArray[9];
        if (inputString.charAt(2) =='1') speedTrain = speedArray[10];
        if  (inputString.charAt(2) =='2') speedTrain = speedArray[11];
        if (inputString.charAt(2)  =='3') speedTrain = speedArray[12];
        if (inputString.charAt(2) =='4')  speedTrain = speedArray[13];
        if (inputString.charAt(2) =='5') speedTrain  = speedArray[14];
        if (inputString.charAt(2) =='6') speedTrain = speedArray[15];
        if (inputString.charAt(2) =='7') speedTrain = speedArray[16];
        if  (inputString.charAt(2) =='8') speedTrain = speedArray[17];
        if (inputString.charAt(2)  =='9') speedTrain = speedArray[18]; 
      }
      if (inputString.charAt(1)  =='2') {      
        if (inputString.charAt(2) =='0') speedTrain = speedArray[19];
      }  

      // Direction and Stop
      if (inputString.charAt(1)  =='d') {
        if (inputString.charAt(2) =='f') { // (f) Forward
          digitalWrite(L298_IN1,  HIGH);
          digitalWrite(L298_IN2, LOW);
          forwardMovingTrain  = true;
        }
        if (inputString.charAt(2) =='b') { // (b) Backward
          digitalWrite(L298_IN1, LOW);
          digitalWrite(L298_IN2, HIGH);
          forwardMovingTrain = false;
        }
        if (inputString.charAt(2)  =='s') { // (s) Stop button
          digitalWrite(L298_IN1, LOW);
          digitalWrite(L298_IN2,  LOW);
          speedTrain = 0;
        } 
      }
      analogWrite(L298_ENA,  speedTrain); // Throttle
    }

    // LEDs control
    if (inputString.charAt(0)  =='l') { 
      // Forward Floodlight white LED
      if (inputString.charAt(1)  =='f') { 
        if (inputString.charAt(2) =='0') digitalWrite(FF_LED, LOW);
        if (inputString.charAt(2) =='1') digitalWrite(FF_LED, HIGH);          
      }  
      // Backward Floodlight white LED
      if (inputString.charAt(1)  =='b') { 
        if (inputString.charAt(2) =='0') digitalWrite(BF_LED, LOW);
        if (inputString.charAt(2) =='1') digitalWrite(BF_LED, HIGH);          
      }
      // Rear red LEDs
      if (inputString.charAt(1) =='r') { 
        if (inputString.charAt(2) =='0') {
          digitalWrite(FRR_LED, LOW);  
          digitalWrite(FRL_LED, LOW); 
          digitalWrite(BRR_LED, LOW);  
          digitalWrite(BRL_LED, LOW);             
        }
        if  (inputString.charAt(2) =='1') {
          if (forwardMovingTrain) {
            digitalWrite(FRR_LED,  LOW); 
            digitalWrite(FRL_LED, LOW); 
            digitalWrite(BRR_LED,  HIGH); 
            digitalWrite(BRL_LED, HIGH);               
          }
          else {
            digitalWrite(FRR_LED, HIGH); 
            digitalWrite(FRL_LED,  HIGH); 
            digitalWrite(BRR_LED, LOW); 
            digitalWrite(BRL_LED,  LOW);                
          }
        }  
      }  

      if  (inputString.charAt(1) =='0') { 
        digitalWrite(FF_LED, LOW);
        digitalWrite(BF_LED,  LOW); 
        digitalWrite(FRR_LED, LOW); 
        digitalWrite(FRL_LED,  LOW); 
        digitalWrite(BRR_LED, LOW); 
        digitalWrite(BRL_LED,  LOW); 
      }       
    }  
    
    Serial.println(inputString);  
    inputString = "";
    stringComplete = false;
  }

  bluetoothEvent();
}


////  FUNCTIONS ////

void bluetoothEvent() {
  if (Bluetooth.available()) {
    char inChar = (char)Bluetooth.read();
    inputString += inChar;
    if  (inChar == 'z') {
      stringComplete = true;
    }
  }
}

Downloadable files

Simple circuit for Garden Train

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