Serial Monitor Issue

Development Tools Cloud Editor
1

I have two problems with Serial Monitor:

  1. On opening the monitor, it will reset the Arduino Uno. Not sure if it's a feature or a bug.

  2. After opening the monitor, I get the error "Uncaught TypeError: Cannot read property 'apply' of undefined(…)" in console and then "serial port unavailable" message. If sketch actually write something to the serial (i.e. Serial.println("test")), I get all those messages in the serial monitor for a fraction of a second and then panel disables and shows the error message.

Tested on Chrome and Firefox, same results. Also tried with different boards and USB ports.

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2

What is your OS ?
Which board ?

Have found that the 101 board is particularly prone to a similar issue and its a known bug.
Leonardo's can also have some minor issues in the way they handle the USB / serial comms.
Not seen the "uncaught type error" bug though. so maybe a few details and or post the sketch that causes it.
If you post the sketch PLEASE use the code tags ( </> ).

3

OS is Windows 10 and board is Uno. Here is a simple code.

void setup() {
    
    Serial.begin(9600);
    
}

void loop() {
    
    Serial.println("Test");
    delay(1000);
}
4

OK the sketch should certainly not cause it.

Can you post the basic output from the chrome developer tools console...Please use tags or if you need add as an attachment.

5

Do you have more than one browser window with Create opened in it? Or Arduino IDE open?

6

I restarted my computer, opened FireFox and loaded the editor, no other browsers or IDE. Same result. Here is a complete screen shot of the issue.

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7

It would be better if you CP's the results into here.
Picture is great and all that but the whole text cannot be scrolled on a picture.

8

Output of console attached as a text file:

console.txt (11.3 KB)

9

Could you please try also with Chrome and/or Edge so we can see if it's a browser related issue?

10

Exact same result for Chrome and Edge. Now I'm not getting any error message in console but Serial Monitor panel is simply not available showing "Serial port unavailable".

11

Could you please try to 'open debug console' from the plugin tray icon and send us some logs?
Thanks