Serial Monitor overwriting lines of text

[gfmoore]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

//http://www.martyncurrey.com/arduino-serial-part-1/  

/// basicSerialPassThru_AltSoftSerial_001
 
#include <AltSoftSerial.h>
AltSoftSerial softSerial; 
 
char c=' ';
 
void setup() 
{
    Serial.begin(9600);
    Serial.print("Sketch:   ");   Serial.println(__FILE__);
    softSerial.begin(9600);  
    Serial.println("AltSoftSerial started at 9600");
}
 
void loop()
{
    // Read from the software serial and send to the hardware seral
    if (softSerial.available())
    {
        c = softSerial.read();
        Serial.write(c);
    }
 
    // Read from hardware serial and send to software serial
    if ( Serial.available() )
    {
        c = Serial.read();
        softSerial.write(c);  
    } 
}

I'm using some cheap Chinese cp2102 usb ttl board.
Works fine on arduino ide v1.

Desktop (please complete the following information):

• OS: Windows 10 Insiders build

[gfmoore]

Just as an additional thought/comment. On the old IDE I can open two instances and set up two serial ports as image. I don't think? I can do this yet with new IDE. This is not a biggie, just something I've noticed as playing with serial. (I am a noob for arduino)

[per1234]

Hi @gfmoore. Thanks so much for reporting this bug!

On the old IDE I can open two instances and set up two serial ports as image. I don't think? I can do this yet with new IDE.

It's no longer necessary to open two instances. Just open another Arduino IDE 2.x window. Each window can have a separate board, port, and Serial Monitor open simultaneously.

[gfmoore]

Ahhh, eventually I was able to create two instances. To do so I had to use File New from main menu.

What I was doing in Win 10 was using the wheel button click on the icon on the task bar to open a new instance. So for example this will work with VS Code or Word - just a habit. (it also works the same way from the icon on the menu.)

Just for benefit of others: If I use File New from the v1 IDE I don't think it is possible to get independent terminals!

:)

[per1234]

This issue occurs when the printed line is wider than the width of the Serial Monitor pane. Here is a minimal demonstration sketch:

void setup() {
  Serial.begin(9600);
}
void loop() {
  Serial.println("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.");
  delay(1000);
}