저번에 올린코드는 제껏도아니고 쓰기가 그래서 제가 한번 만들어본코든데요.

허수 i j를 넣어서  커맨드가 입력될때마다 +한 값이 늘어나게 하고싶은데 잘안되네요

제가 쓴코드에 뭘 첨가해야되는거죠?

#include <SoftwareSerial.h>
#include <Servo.h>
#define moter1EnablePin 13
#define moter1_1 2
#define moter1_2 4

int i=0;
int j=90;

int bluetoothTx = 5;
int bluetoothRx = 6;

SoftwareSerial bluetooth(bluetoothTx, bluetoothRx);
Servo servo;
int angle = 90;
void setup()
{
   servo.attach(9);
   Serial.begin(9600);
   delay(100);
   bluetooth.begin(9600);

   pinMode(moter1_1, OUTPUT);
   pinMode(moter1_2, OUTPUT);

   analogWrite(moter1EnablePin, 0);

}

void loop()
{

char cmd;
if(bluetooth.available() )
{ cmd = (char)bluetooth.read();
  Serial.print("Command=");
  Serial.println(cmd);

  if(cmd == '1')

{
 digitalWrite(moter1_1, HIGH);
 digitalWrite(moter1_2, LOW);
 analogWrite(moter1EnablePin, i+300);
}

if(cmd == '2')

{
 digitalWrite(moter1_1, HIGH);
 digitalWrite(moter1_2, LOW);
 analogWrite(moter1EnablePin, i-300);
}

if(cmd == '3')

{
 digitalWrite(moter1_1, LOW);
 digitalWrite(moter1_2, HIGH);
 analogWrite(moter1EnablePin, i+300);
}

if(cmd == '4')

{
 digitalWrite(moter1_1, LOW);
 digitalWrite(moter1_2, HIGH);
 analogWrite(moter1EnablePin, i-300);
}

if(cmd == '0')

{
 digitalWrite(moter1_1, LOW);
 digitalWrite(moter1_2, LOW);
 analogWrite(moter1EnablePin, 0);
 delay(1000);
 analogWrite(moter1EnablePin, 0);
 analogWrite(moter1EnablePin,0);
 delay(1000);

}
if(cmd == 'a')
  {servo.write(j+10);}
 
  if(cmd == 'b')
  {servo.write(j-10);}
 
 
  if(cmd == 'd')
  {servo.write(j);}

}

}