PWM and direction control of a DC motor via Bluetooth

1#include<SoftwareSerial.h>
2SoftwareSerial bt_ser(4,5); //connected
3  to RX and TX pins for serial data communication
4char c[6];
5int i=0,speed_value=0,send_value;
6
7#define
8  pwm1     9   //input 2
9#define pwm2    10   //input 1
10 
11boolean motor_dir
12  = 0;
13
14void setup()
15{
16  Serial.begin(9600);
17  bt_ser.begin(9600);
18
19  pinMode(pwm1,   OUTPUT);
20  pinMode(pwm2,   OUTPUT);
21}
22
23void loop()
24{
25
26  
27   while(bt_ser.available())   //when data is transmitted
28     {
29       if(bt_ser.available()>0)
30
31       {
32         c[i] = bt_ser.read();   //reading the string sent from master
33  device
34         Serial.print(c[i]); 
35         i++;  
36       }
37       if(c[i-1]=='N')
38    //if button is pressed
39        {
40          motor_dir = !motor_dir;     //toggle
41  direction variable
42          if(motor_dir)               //setting direction,
43  pwm1 and pwm2 are opposites
44            digitalWrite(pwm2, 0);
45          else
46
47            digitalWrite(pwm1, 0); 
48        }
49      }
50       
51       speed_value
52  = (c[1]-48)*100+(c[2]-48)*10+(c[3]-48)*1;  //interpreting speed from string
53
54       if(motor_dir)   //for a given direction
55          {
56            if(c[i-1]=='#'){
57   //if data has been transmitted from slider
58              
59              analogWrite(pwm1,
60  speed_value-100);  //-100 so that when slider is on "0" speed is 0
61              i=0;
62
63            }
64          }
65        else{       //for opposite direction
66
67          if(c[i-1]=='#'){
68            
69            analogWrite(pwm2, speed_value-100);
70
71            i=0;
72          }
73          
74        }
75            
76                
77}
78   

1#include<SoftwareSerial.h>
2SoftwareSerial bt_ser(4,5); //connected  to RX and TX pins for serial data communication
3char c[6];
4int i=0,speed_value=0,send_value;
5
6#define  pwm1     9   //input 2
7#define pwm2    10   //input 1
8 
9boolean motor_dir  = 0;
10
11void setup()
12{
13  Serial.begin(9600);
14  bt_ser.begin(9600);
15  pinMode(pwm1,   OUTPUT);
16  pinMode(pwm2,   OUTPUT);
17}
18
19void loop()
20{
21  
22   while(bt_ser.available())   //when data is transmitted
23     {
24       if(bt_ser.available()>0)
25       {
26         c[i] = bt_ser.read();   //reading the string sent from master  device
27         Serial.print(c[i]); 
28         i++;  
29       }
30       if(c[i-1]=='N')    //if button is pressed
31        {
32          motor_dir = !motor_dir;     //toggle  direction variable
33          if(motor_dir)               //setting direction,  pwm1 and pwm2 are opposites
34            digitalWrite(pwm2, 0);
35          else
36            digitalWrite(pwm1, 0); 
37        }
38      }
39       
40       speed_value  = (c[1]-48)*100+(c[2]-48)*10+(c[3]-48)*1;  //interpreting speed from string
41       if(motor_dir)   //for a given direction
42          {
43            if(c[i-1]=='#'){   //if data has been transmitted from slider
44              
45              analogWrite(pwm1,  speed_value-100);  //-100 so that when slider is on "0" speed is 0
46              i=0;
47            }
48          }
49        else{       //for opposite direction
50          if(c[i-1]=='#'){
51            
52            analogWrite(pwm2, speed_value-100);
53            i=0;
54          }
55          
56        }
57            
58                
59}