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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.

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  • This error is not on Arduino side but on the PC side (.NET code or configuration), hence off-topic here. Voting to close it. – jfpoilpret Feb 25 '17 at 6:51
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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.

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  • Thakns. I inspect my PC Manager and I don't an arduino driver – KiRa Feb 27 '17 at 0:48
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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?

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  • The Serial1 is from the design built-in in VS 2008 or 10. Just for curiosity: Why VB? A: don't know how to use another language yet – KiRa Feb 24 '17 at 8:06
  • Can you program an Arduino? If so you know the basics of C C++ and C#(.Net). Switch from VB to C#, its better, trust me, and won't take much learning. – Code Gorilla Feb 27 '17 at 13:11

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