It's just a conversation starter, chances are that he is at least slightly interested in you.
It means he wishes you to communicate and convey in a short line your current happenings in your life most likely as a reply to said text message via a cellular telephone.
He just wants to talk to you. I wouldn't be jumping to conclusions.
What does it mean when a guy texts you "Hey girl what's up?"
Does it mean anything from a guy friend?