Hi, We are trying to find a solid solution for wireless plotter control. We have been experimenting with different hardware/software combo's without much success. Currently setup for stepper but not married to it. This link ( XY-Plotter Application for Andoid ) is for a MakeBlock app that is nearly perfect for our application but can not get it to work and have not found anyone with much success with it. Basic image file. Android to plotter. Any ideas? GRBL? BT? Willing to compensate for some PT help on this and some other controls projects. Much appreciated! Charlie