How do I connect LaserGRBL to the engraver?

Connect your laser marker to the computer with a USB cable. In LaserGRBL, choose the serial port which is usually the one with the highest number and press 'connect'. Ensure that the message 'Grbl' followed by the version number appears (e.g., 1.1h). If it doesn't work, check for missing drivers or verify if your controller uses GRBL firmware. (Page 2)