I added the Library U8g2 to the Arduino R3 platform and tried to run the integrated example "Hello World".
The constructor line for "SH1107 - 128x64 - SPI" is released. The 3 mentioned wires are connected
as descibt in the constructor line. Further wires are connected to CLKPIN11 and DIN13.
What is the reason that the screen is still black!