I opened up my Arduino IDE to upload the same code I have been for 2 years and the port is not working. It constantly shows that Port 3 Is open even if my board (ESP 32) is not connected or is connected. Then, when I go to upload the code, it says a critical error that Port 3 cannot be opened. What has changed?
Something else on your system is using port 3?
It means that this port has nothing to do with your ESP32
You left a serial monitor running?
Welcome to this forum.
You might want to look at this How to get the best out of this forum before you proceed any further.
We only know what you tell us, and without knowing what you have, we don't stand a chance.
Sadly, so far you have told us very little about what you have.
What version of the IDE are you running?
Have you got the automatic update option enabled?
Is this the code that you are keeping secret? Without seeing it we can only guess what it is. Please post it using the method described in the above link.
Has your hardware changes?
Are you using solderless bread board for your hardware?
What is the schematic of your hardware? Please post it.
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