[SOLVED] (X)Ubuntu 14.04: Serial monitor stays empty

Hi everyone,

I have an Arduino MEGA 2560 connected to my laptop (USB 3.0) and when I use the Serial monitor it shows the output before the reset from the Serial monitor. After that, the monitor stays empty?

If I use the digitalSerial example I receive the data in the Serial monitor if I use this simple sketch:

// Sweep
// by BARRAGAN <http://barraganstudio.com> 
// This example code is in the public domain.


#include <Servo.h> 
 
Servo myservo;  // create servo object to control a servo 
                // a maximum of eight servo objects can be created 
 
int pos = 0;    // variable to store the servo position 
int count;
int tries;
int minServo;
int maxServo;
 
void setup() 
{ 
  pinMode(A0, INPUT);
  Serial.begin(9600);
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
} 
 
 
void loop() 
{ 
  for(pos = 45; pos < 135; pos += 1)  // goes from 0 degrees to 180 degrees 
  {                                  // in steps of 1 degree 
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(25);                       // waits 15ms for the servo to reach the position 
  } 
  myservo.detach();
  maxServo = analogRead(A0);
  delay(1000);
  myservo.attach(9);
  
  for(pos = 135; pos>=45; pos-=1)     // goes from 180 degrees to 0 degrees 
  {                                
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(25);                       // waits 15ms for the servo to reach the position 
  }
  myservo.detach();
  minServo = analogRead(A0);
 delay(1000); 
 myservo.attach(9);
 tries++;
 if(minServo <= 188 && maxServo >= 333)
 {
 Serial.print("TEST SUCCEED: ");
 count++;
 Serial.print(count);
 Serial.print("/");
 Serial.println(tries);
 Serial.print("MIN:");
 Serial.println(minServo);
 Serial.print("MAX:");
 Serial.println(maxServo);
 Serial.println("-------------------------");
 }
}

I get a blank Serial monitor, it works fine when I use my desktop and the Arduino with this sketch.

Cheers,
Dylan

It was just a bad connection, works fine now!

Cheers,
Dylan