user31269: Hello everyone I'am new to this site so please bear with me.
I have an Arduino Uno that I'm using in my simple project using VS 2008. I got this error says The Port COM1 does not exist. The flow of my project is after inserting a coin into the coin slot the arduino will pass the data into my project and it will display into a Label or Textbox the value of the inserted coin.


user31105: Probably it is on another COM port. When I checked my IDE (from Arduino) the Arduino was found at COM3.
You probably have to iterate through the (PC) COM ports to find out where the Arduino is connected to.

user31030: Never used Visual Basic but:

There is no such thing as Serial1 on Arduino Uno. There is only Serial. (Serial1, 2, 3 are available on ArduinoMega) Reference: Arduino
For COM port you should check your device manager. Often it appears at COM3 so probably you should check this issue.

Just for curiosity: Why VB? Is it only your choice or it use less ram or memory, works faster or anything?

31269: <p>Hello everyone I'am new to this site so please bear with me.</p>

<p>I have an <strong><code>Arduino Uno</code></strong> that I'm using in my simple project using <code>VS 2008</code>. I got this error says <code>The Port COM1 does not exist</code>. The flow of my project is after inserting a <code>coin</code> into the <code>coin slot</code> the arduino will pass the data into my project and it will display into a Label or Textbox the value of the inserted coin.</p>

<p><a href="https://i.stack.imgur.com/ttoMI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ttoMI.png" alt="enter image description here"></a></p>
 31105: <p>Probably it is on another COM port. When I checked my IDE (from Arduino) the Arduino was found at COM3.</p>

<p>You probably have to iterate through the (PC) COM ports to find out where the Arduino is connected to.</p>
 31030: <p>Never used Visual Basic but:</p>

<ul>
<li>There is no such thing as Serial1 on Arduino Uno. There is only Serial. (Serial1, 2, 3 are available on ArduinoMega) Reference: <a href="https://www.arduino.cc/en/Reference/Serial" rel="nofollow noreferrer">Arduino</a></li>
<li>For COM port you should check your device manager. Often it appears at COM3 so probably you should check this issue.</li>
</ul>

<p>Just for curiosity: Why VB? Is it only your choice or it use less ram or memory, works faster or anything?</p>
