Very cheap display of Saint Smart for Arduino Mega NOT Uno R3. Because of pluggability between Mega and UNO on Uno R3 pluggable. Unfortunately, the UN has too few outputs / inputs in order to use the functions of display and touch simultaneously. The software support is meager and only found with difficulty. After some time I found a guide by Craig A. Lindely, so at least the display works with a lot of wiring.