Discuss here different C compiler set ups, and compiling executables for the ESP8266

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By makiyoung
#67199 I recently started with Arduino and I got my 8x8 dot matrix to work using an adjusted form of Brainy-bits Space Invaders code. However, I stuck my MAX7219 into a breadboard to have it standing upright, but of course the image is then rotated 90 degrees. Is there an easy way to flip it? I tried switching the DIN and CS pins in LedControl because I wasn't too sure what they do, but it has no effect.