**Regardless of the program I run,** I get an error when I open the Serial monitor. Here are the steps that I used:
1. Run program
2. Click on upper right Serial monitor
3. Yellow window shows in input line for monitor stating "Not connected. Select a board and a port to connect..." But the monitor accepts input and shows the result. See picture 1
4. Disconnect arduino from USB, reconnect, and monitor input window is correct. See picture 2
johnsin
February 3, 2022, 11:32pm
2
I have the same problem -- it's extremely frustrating. I can find nothing online that helps.
This issue seems to be a coding issue in the Beta IDE. I'm sure someone will be looking into this. In the meantime, I will just do what I've been doing.
Hi @bigguy66 and @johnsin . This bug is being tracked by the Arduino IDE developers here:
opened 03:32AM - 16 Jan 22 UTC
closed 01:25PM - 08 Jun 22 UTC
topic: code
type: imperfection
topic: serial monitor
## Describe the bug
The Serial Monitor and Serial Plotter communicate to the … user when the currently selected port is not connected (e.g., the user unplugged their Arduino board).
:bug: The Serial Monitor and Serial Plotter of all except the first Arduino IDE window of the session with a given port selected give this indication even when the port is indeed connected to the computer.
## To Reproduce
### Preparation
Upload a sketch to your Arduino board that sends plottable serial output:
```cpp
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.println(random(100));
delay(500);
}
```
The bug will occur regardless of which sketch is on the board. This sketch is only intended to make the behavior easier to observe.
### Observe baseline working state
This procedure is not required to reproduce the bug. It is only intended to prove that the issue does not occur in the first window of the session.
1. Open the "**Serial Monitor**" view (**Tools > Serial Monitor**).
:slightly_smiling_face: Notice that no disconnected indicators are shown, as expected.
1. Open the "**Serial Plotter**" window (**Tools > Serial Plotter**).
:slightly_smiling_face: Notice that no disconnected indicators are shown, as expected.
1. Close the "**Serial Monitor**" view (**X** icon).
This is not mandatory to reproduce the bug. It is done so that Serial Monitor will not be open in the first window of the next session, which might give the impression that is a required condition to reproduce the bug.
1. Select **File > Quit** from the Arduino IDE menus.
This is not mandatory to reproduce the bug. It is done so that it is clear that none of the operations performed during this procedure are required conditions to reproduce the bug.
### Observe bug
1. Start the Arduino IDE.
1. If not already selected, select your board and port from the board/port selector dropdown.
1. Select **File > New** from the Arduino IDE menus.
This loads the second window of the current IDE session.
1. Open the "**Serial Monitor**" view (**Tools > Serial Monitor**).
1. Select "**9600 baud**" from the "**Serial Monitor**" view's baud rate menu.
:slightly_smiling_face: Notice that random numbers are periodically printed to the Serial Monitor view's output field, as expected.
:bug: Notice that there is an unexpected banner in Serial Monitor:
> Not connected. Select a board and a port to connect automatically.
1. Open the "**Serial Plotter**" window (**Tools > Serial Plotter**).
:slightly_smiling_face: Notice that random numbers are periodically plotted in the Serial Plotter, as expected.
:bug: Notice that the Serial Plotter window title has the "**(disconnected)** suffix.
:bug: Notice that a "**Board disconnected**" notification is shown in the Serial Plotter window.
:bug: Notice that some Serial Plotter UI elements are disabled.
## Expected behavior
Serial Monitor and Serial Plotter of subsequent IDE windows to connect to the selected port.
## Desktop
- OS: Windows 10
- Version: 2.0.0-rc3-snapshot.35e5da5
Date: 2022-01-13T17:15:54.562Z
CLI Version: 0.20.2 [13783819]
## Additional context
---
I believe this issue, https://github.com/arduino/arduino-ide/issues/752, and https://github.com/arduino/arduino-ide/issues/726 to all be different symptoms of the same bug. I decided to open a separate issue for each distinct symptom because users affected by one symptom will not associate it with the report for another symptom, making the bug more difficult to support and track.
---
I bisected the related issue https://github.com/arduino/arduino-ide/issues/726 to https://github.com/arduino/arduino-ide/commit/767b09d2f10cab78b07754039ebb749d55b45d8d (it does not occur at https://github.com/arduino/arduino-ide/commit/88397931c5b704516e881959f6e7ce106094d14d).
---
Originally reported by @hpssjellis at:
https://github.com/hpssjellis/my-examples-for-the-arduino-portentaH7/tree/master/ide2.0#:~:text=why%20does%20it%20say%20it%20is%20not%20connected
and by @DroneBotWorkshop at:
https://forum.arduino.cc/t/rc3-serial-plotter-monitor-show-disconnected-when-they-are-not/947524
If you have a GitHub account, you can subscribe to that issue to get notifications of any new developments related to this subject.
r43007
April 9, 2022, 12:55am
5
Is there a resolution to this problem yet. I can't get this to work on my PC either using a Mega board.
Hi @r43007 . There is no resolution yet.
However, there is a workaround. The workaround is to only ever use the Serial Monitor in the first windows that open after starting the Arduino IDE. If you run into the problem, select File > Quit from the Arduino IDE menus and then start the Arduino IDE again to reset it from the buggy state.
2 Likes
r43007
April 9, 2022, 4:36pm
7
Thank you for confirming and advising of the work around. Closing extra sketches and removing and reinserting usb works.
2 Likes
system
October 6, 2022, 4:37pm
8
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.
