First of all, I'm not a coder. However, I'm trying to customize the firmware for my Prusa 3D printer. The instructions on GitHub (GitHub - prusa3d/Prusa-Firmware: Firmware for Original Prusa i3 3D printer by PrusaResearch) say to modify 'platform.txt' file which is part of the Arduino 1.6.9 installation. This apparently enables the printer to recognize and track the height of its vertical moving axis. Thing is, I have done as the instructions say and the printer doesn't show the height, only a ? where the numbers should be. I have taken this up with Prusa and they say it's something to do with the Arduino program, specifically the edited platform.txt document. So I've come here, seeking advice...
You can find more information at (second post from the bottom on page 1 and all page 2)
I would really appreciate any suggestions.