This issue happens when more than a screen-full of old serial data from some previous operation is displayed, and then an upload is done, and the new program outputs new data (like a "hello world" message).
1 Like
Toggle autoscroll, circled in red at the right hand side, and see if it solves the issue.
@weshowe is correct. I have the same problem, and scroll is enabled. Starting a new upload with serial output does not place the scroll at the end the old data to show the new output. It seems to show the screen somewhere arbitrarily.
1 Like
pjrc
December 1, 2022, 4:39pm
4
I tried to create a demo video.
1 Like
pjrc
December 2, 2022, 1:32pm
5
Defragster opened an issue on github.
opened 05:32AM - 01 Dec 22 UTC
topic: code
type: imperfection
topic: serial monitor
### Describe the problem
**Serial Monitor** view does not autoscroll on new cā¦ ontent received when the view is not in focus.
### To reproduce
#### Equipment
Any Arduino board that can print to **Serial Monitor**.
#### Steps
1. Create a sketch that prints to Serial Monitor soon after the program starts:
```cpp
void setup() {
Serial.begin(9600);
for (byte counter = 0; counter < 100; counter++) {
Serial.println("hello");
}
}
void loop() {}
```
1. Connect the Arduino board to your computer.
1. Select the board and port in Arduino IDE.
1. Open the "**Serial Monitor**" view if it is not already open.
1. Select "**9600 baud**" from the dropdown baud rate menu at the top right corner of the "**Serial Monitor**" view.
1. If it is not already enabled, click the "**Toggle Autoscroll**" icon near the top left corner of the "**Serial Monitor**" view to enable autoscroll.
1. Click the "**Clear Output**" icon at the top left corner of the "**Serial Monitor**" view.
1. Select **Sketch > Upload** from the Arduino IDE menus.
1. Wait for the upload to finish successfully.
1. Select the "**Serial Monitor**" tab in the bottom panel.
š The printed text is not visible in the "**Serial Monitor**" view:
1. Scroll the output field of the "**Serial Monitor**" view downward.
You will now see the printed text.
1. Click the "**Clear Output**" icon at the top left corner of the "**Serial Monitor**" view.
1. Create a sketch that prints to Serial Monitor after a delay:
```cpp
void setup() {
Serial.begin(9600);
delay(10000);
for (byte counter = 0; counter < 100; counter++) {
Serial.println("world");
}
}
void loop() {}
```
1. Select **Sketch > Upload** from the Arduino IDE menus.
1. Wait for the upload to finish successfully.
1. Immediately select the "**Serial Monitor**" tab in the bottom panel.
**ā** The reason for the "immediately" instruction is to ensure the "**Serial Monitor**" view will have focus by the time the sketch program starts printing.
1. Wait until the sketch program's 10 s delay has passed.
š Serial output from the board is visible in the "**Serial Monitor**" view.
ā The scroll is incomplete due to a separate bug: https://github.com/arduino/arduino-ide/issues/1736
### Expected behavior
All buffered output should be visibly displayed in Serial Monitor tab.
### Arduino IDE version
#### Original report
2.0.2
#### Last verified with
5695fd8
### Operating system
Windows
### Operating system version
windows 11
### Additional context
Originally reported at https://forum.pjrc.com/threads/71588-Arduino-IDE2-Serial-Monitor-sometimes-does-not-work-continue-from-Upload-Thread?p=316565
Additional reports:
- https://forum.arduino.cc/t/ide-2-0-2-serial-monitor-data-forgets-to-scroll-with-new-data/1060247
### Issue checklist
- [X] I searched for previous reports in [the issue tracker](https://github.com/arduino/arduino-ide/issues?q=)
- [X] I verified the problem still occurs when using the latest [nightly build](https://www.arduino.cc/en/software#nightly-builds)
- [X] My report contains all necessary details
2 Likes
Hello ,
system
August 2, 2023, 11:21am
7
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