add how to use ArtNet with FastLED

README.md

@@ -119,6 +119,52 @@ void loop()
 }
 ```
 
+
+### Artnet Receiver + FastLED
+
+
+``` C++
+#include <Artnet.h>
+
+// declarations for Ethernet/WiFi
+
+ArtnetReceiver artnet;
+
+// FastLED
+#define NUM_LEDS 1
+CRGB leds[NUM_LEDS];
+const uint8_t PIN_LED_DATA = 3;
+
+void setup()
+{
+    // setup Ethernet/WiFi...
+
+    // setup FastLED
+    FastLED.addLeds<NEOPIXEL, PIN_LED>(&leds, NUM_LEDS);
+
+    artnet.begin();
+    artnet.subscribe(universe, [](uint8_t* data, uint16_t size)
+    {
+        // artnet data size per packet is 512 max
+        // so there is max 170 pixel per packet (per universe)
+        for (size_t pixel = 0; pixel < NUM_LEDS; ++pixel)
+        {
+            size_t idx = pixel * 3;
+            leds[pixel].r = data[idx + 0];
+            leds[pixel].g = data[idx + 1];
+            leds[pixel].b = data[idx + 2];
+        }
+        FastLED.show();
+    });
+}
+
+void loop()
+{
+    artnet.parse(); // check if artnet packet has come and execute callback
+}
+```
+
+
 ## Other Settings
 
 ### Net, Sub-Net, Universe, and Universe(15bit)