Hello,

I just bought my very first Arduino so I'm a totally new at this. The board is an Arduino Pro Micro (bought here).

I'm using the default Blink example to test it. When I upload the sketch to the Arduino it doesn't start by itself, but when I open the serial monitor it does start blinking. The moment I close the serial monitor it stops.

Also when I disconnect the USB and reconnect it it doesn't blink anymore.

How can I make the sketch run immediately after uploading, without the need for a serial port connection, and run immediately when connected to the power?

The end goal is to have a motion detector that just turns on an LED on motion detection (I already have the hardware for this).