Error opening serial port COM4: Port not found

edited November 2017 in Arduino

Hello, i've been having this error every time i run my processing code, Capture1 even if i change the port to COM5 still getting the same error, this is suposed to connect to the port used by a bluetooth module connected to and arduino UNO board, i got it working before, but now it is just not running. Capture2

i'm using windows 10 (64), processing 3.3.6, thanks


  • For completeness to your topic, what B2 module in your Arduino are you using?

    The above dialog that you showed, where did you get it from? Check the device manager under Ports (Com & LPT). What port is allocated to your B2 link?

    This is a bit silly, but restart your computer and see if it solves the problem.


Sign In or Register to comment.