Nodemcu Line Follower with app control

Hello buddy.. I'm here to get some suggestion.
I started my ptoject which is Wifi control office assistsnt bot. Here I make Nodemcu wifi Line follower following some resources. I also make a app with MIT app inventor for controlling it.
But, here is the challenge that I have to control bot from my place to different stations on the line using app and line following method.Bot need to count stations and develop his algorithm through the defined station pressed from the sender. I am badly in need of the solution of this counting and developing wifi line follower.
Thanks in Advance