Arm Robot + Mobile App

String inString = "";    // string to hold input

#include <Servo.h> 
// Declare the Servo pin 
int servoPin = 8 , servoPin2 = 9,servoPin3 = 10, servoPin4 = 11 ; 

Servo Servo1, Servo2 , Servo3 , Servo4; 

void setup() {

  Servo1.attach(servoPin); 
  Servo2.attach(servoPin2); 
  Servo3.attach(servoPin3); 
  Servo4.attach(servoPin4); 

  Servo1.write(0);
  Servo2.write(0);
  Servo3.write(0);
  Servo4.write(0);
  
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  /*while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  // send an intro:
  Serial.println("\n\nString toInt():");
  Serial.println();

  */
}


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 == '\n') {
      Serial.print("Value:");
      Serial.println(inString.toInt());

      int value = inString.toInt();
      
                      if(value>=0 && value<=90){
                      Serial.println(value); 
                      int servo1_position = map(value, 0, 90, 0, 180);
                      Servo1.write(servo1_position);
                      }
                     if(value>90 && value<=181){
                      Serial.println(value); 
                      int servo2_position = map(value, 91, 181, 0, 180);
                      Servo2.write(servo2_position);
                      }
                
                    if(value>181 && value<=272){
                      Serial.println(value); 
                      int servo3_position = map(value, 182, 272, 0, 180);
                      Servo3.write(servo3_position);
                      }
                
                    if(value>272 && value<=363){
                      Serial.println(value); 
                      int servo4_position = map(value, 273, 363, 0, 180);
                      Servo4.write(servo4_position);
                      }
    
      inString = "";

  
      
      //Serial.print("String: ");
      //Serial.println(inString);
      // clear the string for new input:
     // 
    }
    
  }
}