Port monitor error: command 'open' failed: Invalid serial port. Could ...
May 16, 2023 · Hi guys, I am new to Arduino and don't know a lot of things about Arduino and how thing should or shouldn't go, so I am sorry:D For context I am trying to do this project to graduate on high …
how to arduino serial communication open without restart
Jul 17, 2018 · arduino_new: while(!Serial){} will pause your program until you open the serial monitor Thank you for your answer. However, it still starts with the setup function.
Error when opening Serial Monitor: "We can't find the device"
Dec 3, 2024 · General discussion and support requests are always welcome here on the Arduino Forum. Until the bug is resolved, I can suggest the workaround of rolling back to a previous version of the …
Recent problem about serial port connection - Arduino Forum
Nov 11, 2023 · You might get the impression that the IDE's ability to upload while Serial Monitor is open (at least when things are working as usual) contradicts my statement above, but actually only one of …
Serial Monitor - how to open automatically? - Arduino Forum
Sep 2, 2011 · Hello: I just got into Arduino programming - and am having a blast! I've got some experience with C programming, so this is really fun. I've got a question on the Arduino IDE operation …
Serial monitor in a separate window - IDE 2.x - Arduino Forum
Sep 13, 2022 · You can open an empty sketch in another window and make the serial monitor box as big as possible. If you are connected to the same arduino in both windows you can see the serial …
Arduino UNO Q via IDE - No Serial Monitor Output
Oct 30, 2025 · Official HardwareUNO FamilyUNO Q x4000 October 30, 2025, 12:47pm 1 Arduino IDE 2.3.6 Windows 10.0.26100.6899 Arduino UNO Q - Linux <> 6.16.7-g0dd6551ae96b Open Arduino …
Error opening serial port"com5" (port busy) - Arduino Forum
Jan 12, 2021 · the serial port might be used by another application. open the devices manager expand the comports menu existing ports will be listed. unplug the arduino from PC port the screen will …
Nothing appears on serial monitor - IDE 2.x - Arduino Forum
May 5, 2025 · Welcome to the forum Which Arduino board are you using ? What happens if you reset the board whilst the Serial monitor is open ? Please follow the advice given in the link below when …
Cannot open serial monitor "selected port is closing"
Feb 26, 2025 · Getting this error message when I click on serial monitor to open it. I am using an arduino uno and the web editor. Any ideas what this error means?