PWM LED Control using Android serial emulator

ledcontrol.ino

/* buildcircuit.com*/
 
int ledPin = 11; 
String inString = "";    // string to hold input
int value;
void setup() {
  // Initialize serial communications:
  Serial.begin(9600);
}

void loop() {
  // Read serial input:
  while (Serial.available() > 0) {
    int inChar = Serial.read();
   
     if (isDigit(inChar)) {
      // convert the incoming byte to a char 
      // and add it to the string:
      inString += (char)inChar; 
          }
    // if you get a newline, print the string,
    // then the string's value:
   if (inChar == '?') {
     Serial.print("Value:");
     //  Serial.println(" ");
      Serial.println(inString.toInt());
      value = inString.toInt();
    if (value>255)
      {
      //value = 255;
       
      Serial.println("Enter 0-255");
       Serial.println(" ");
      //  analogWrite(ledPin, value); 
    for(value = 0 ; value <= 255; value +=5) { 
    // sets the value (range from 0 to 255):
    analogWrite(ledPin, value);         
    // wait for 30 milliseconds to see the dimming effect    
    delay(30);                            
  } 
      inString = " ";
      }
      //Serial.print("String: ");
     // Serial.println(inString);
      // clear the string for new input:
      else if (value==0) {
      for(value = inChar ; value = 0; value -=5) { 
    // sets the value (range from 0 to 255):
    analogWrite(ledPin, value);   
delay(30);      
      }
      value == 0;
      analogWrite(ledPin, value); 
      }
      
      else {
               
      inString = " "; 
      analogWrite(ledPin, value); 
      }
   }
  }
}