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  • but with this way I cant light up many leds at the same time Commented Nov 12, 2018 at 14:17
  • What does this have to do with how many LEDs you can light up at once? This just gives you an LED number. What you do with that is up to you. I would use it to set an LED colour in the NeoPixel library. I don't think you quite understand exactly what you want to achieve with this. Commented Nov 12, 2018 at 14:25
  • yes but if I wanted to light whole fourth floor its gonna be easy with assigning them number. Commented Nov 12, 2018 at 14:27
  • They already have a number. What do you want to "assign"? Commented Nov 12, 2018 at 14:32
  • okay its long but I'm gonna share my code,you will understand what I mean Commented Nov 12, 2018 at 18:54