3018 cnc engraver question

Hi everyone.

I need to engrave   serial numbers on a bunch of  fiberglas sticks. Engraver comes with Grbl (candle) controller wich doesnt have an option to input type unlike the one on elekcmaker lazer controller. Any possible solution to type a number that being converted into code?

Thank you.=)

Hopefully, someone will see this question and can help. You might consider posting on Hackaday, this seems more like up their alley.