title: Unknown Output Characters in Arduino
body: <p>I am actually connecting my laptop and arduino using FPVDrone 3DR Radio Telemetry. My connection is </p>
  
  <pre><code>ARDUINO tx- FPV Air module rx
  ARDUINO rx- FPV Air module tx
  ARDUINO 5v- FPV Air module 5v
  ARDUINO GND- FPV Air module GND
  </code></pre>
  
  <p>while my FPV ground module is connected to my laptop. I have an app running using node JS with the following script</p>
  
  <pre><code>const SerialPort = require('serialport');
  const Readline = SerialPort.parsers.Readline;
  const port = new SerialPort('COM3');
  port.write('hello');
  </code></pre>
  
  <p>and my arduino code is </p>
  
  <pre><code>void setup() {
  
    Serial.begin(57600);
  
  }
  
  void loop() {
  
    if (Serial.available()) {
  
      Serial.print((char) Serial.read());
  
      delay(10);
  
    }
  
  }
  </code></pre>
  
  <p>i'm pretty sure they are communicating because my arduino is receiving some output, however the output is some characters i dont know,</p>
  
  <p><a href="https://i.stack.imgur.com/jBevF.png" rel="nofollow noreferrer">arduino output</a></p>
  
  <p>can someone please tell me what I should do so that i can receive the string "hello" to my arduino?</p>