I am using the web editor and an Arduino Uno clone by a Chinese company named Geekcreit. My sketch, which operates a servo motor, runs as expected, but I would also like to see messages written to the serial line.
When clicking on Monitor, however, all I get is an error “serial port temporarily busy”. This is so no matter which sketch I run, e.g. the unchanged ASCII table sketch.
Is there something wrong with the Arduino, or my PC, or do I have to set something up first?