Hello Dudes, first i have to say its my first time at Github and my english is not the best..^^

I want to build a LED Matrix with the ws281b LEDs. I already bought them and also started solvering, so please dont give me a answer like "why u dont buy a complete matrix?", or "why do u use this kind of LED Strip?"... The matrix consists out of 14x15 LEDs and it is possible to controll each of them like leds[23]=CRG(255,0,0). I use an Arduino Uno, to controll the LEDs.

A part of my Code looks like that:

include

// How many leds in your strip?

define NUM_LEDS 29

// For led chips like Neopixels, which have a data line, ground, and power, you just // need to define DATA_PIN. For led chipsets that are SPI based (four wires - data, clock, // ground, and power), like the LPD8806 define both DATA_PIN and CLOCK_PIN

define DATA_PIN 6

// Define the array of leds CRGB leds[NUM_LEDS];

void snake(int len,int pos){ for (int t=0;t<len;t++){ if(t+pos<NUM_LEDS){ leds[pos+t]= CRGB(0,255,0); } else{ leds[pos+t-NUM_LEDS]= CRGB(0,255,0); } } FastLED.show(); for (int t=0;t<len;t++){ if(t+pos<NUM_LEDS){ leds[pos+t]= CRGB(0,0,0);} else{ leds[pos+t-NUM_LEDS]= CRGB(0,0,0); } } }

void setup() { FastLED.addLeds<WS2812B, DATA_PIN, RGB>(leds, NUM_LEDS); }

void loop() { for (int i=0;i<NUM_LEDS;i++){ snake(5,i); delay(200); } }

I would like to build a game like Snake or Tetris in the future. So i need to use my Keyboard to write a function like

void move(int position){ if(pressRight && (position+1)%14!=0){ //if the position is at the end of the map, he cannot move right leds[position+1];}}

It is just an example how I would like to write the function. I know there is a possibility to create a twi dimensional array, so I dont have to do like (position+1)%14!=0), but thats a problem for the future ^^

My problem i am asking for at the moment is how to use my keyboard to controll the LEDs in realtime and without using any other Pins at the Arduino instead of the Data-Pin 6, the Gnd Pin and the 5V pin.

I just want to controll the code with an usb cable to the arduino. Maybe later i will add some buttons to the matrix and connect them to the Arduino, but at the moment I just want to upload the code to the Arduino and use "w","a","s","d" to move around the LED Matrix.

Thank u for ur help!

arduino / Arduino

FastLED with Keyboard? #5532

include

define NUM_LEDS 29

define DATA_PIN 6