got this running with a Reichelt LED Display: https://www.reichelt.de/arduino-led-matrix-32-x-16-leds-weiss-ard-led-32x16-wt-p282620.html?CCOUNTRY=445&LANGUAGE=de&nbc=1&&r=1
not running on this Display: https://www.reichelt.de/arduino-led-matrix-32-x-16-leds-rot-ard-led-32x16-rd-p282619.html?CCOUNTRY=445&LANGUAGE=de&nbc=1&&r=1
