A simple sketch to test all fuctions of a RepRapDiscount Smart Controller or compatable.
This also demonstrates how to use this LCD outside of a reprap/3d printer firmware
Designed for a ramps 1.4 board on a mega2560
It's all rather self explanatory
Flash this to the board and verify you get a display. Try all the buttons and knobs, verify the display says they are working. If you insert the SD card it will try to read it and display the results. Remove the SD card to return to the main testing screen. Hold down both the STOP and Encoder button to activate the buzzer.