Serial Monitor sometimes doesn't do anything on ChromeOS

[mrbuck]

Continuing the discussion from Serial monitor not working after may 6th update:

We are still having this problem. We are using Chromebooks to push code to a SparkFun RedBoard which is Uno compatible. We are using Arduino Cloud. A couple of kids had the serial monitor work for a minute then stop. For other kids it just doesn't do anything.

[ptillisch]

Hi @mrbuck. The Arduino sketch program that is running on the Arduino board is configured to communicate over the serial port at a specific baud rate. This is done via the Serial.begin function.

For example, if the sketch contains a line like this:

Serial.begin(115200);

then the Serial communication is done at 115200 baud.

The Arduino Cloud Monitor must be configured for the same baud rate as set in the sketch program.

Check to make sure the selection in the menu at the bottom left corner of the Serial Monitor page matches the baud rate in the sketch code. If not, select the correct baud rate. Hopefully you will then see the expected output in the Monitor.