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Normal Topic Serial port not found (Read 67 times)
557Torino
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Serial port not found
Jun 2nd, 2026 at 8:39pm
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When loading a new sketch the serial monitor shows the following:
Opening port
Serial port not found
debug off
port failed to open.
This started to happen recently.  I have tried adding delays before and after the serial.begin line, but to no avail.  This does not happen with the Arduino IDE.
If the connect button is clicked on the serial monitor the sketch will start outputting to the serial monitor, but any initial outputs from the setup will be lost.
Anybody else have this problem?
  
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Simon@Visual Micro
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Re: Serial port not found
Reply #1 - yesterday at 2:58pm
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Thanks for the report.

Can you attach the verbose build and upload log from Output > Micro Build, with the below options enabled?
  • vMicro > Compiler > Verbose
  • vMicro > Compiler > Show Build Propertie
  • vMicro > Uploader > Verbose


This should give us more to investigate as to why the same serial monitor tool as in the Arduino IDE cannot connect to the port after upload.
  
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