Update file README.md

README.md

+# xAAL Lib for Java
 
 This repo contains the Java implementation of the xAAL protocol.
 It provides a set of classes to create xAAL devices and gateways,
 and a sample usage of these classes.
 
+## Usage
+```java
+package imt.xaal.tests;
+
+import java.util.Arrays;
+import java.util.UUID;
+
+import imt.xaal.lib.Engine;
+
+public class TestLamp {
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args) throws Exception{
+
+        LogFormatter.install();
+        Engine eng = new Engine();
+        Lamp l1 = new Lamp(UUID.fromString("6265eb30-8c59-11e9-98b1-b827ebe99201"));
+        Lamp l2 = new Lamp(UUID.fromString("6265eb30-8c59-11e9-98b1-b827ebe99202"));
+        UUID grp = UUID.randomUUID();
+        l1.setGroupID(grp);
+        l2.setGroupID(grp);
+
+        eng.registerDevices(Arrays.asList(l1,l2));
+        eng.init();
+        eng.start();
+        
+        l1.toggle();
+        l2.setBrightness(50);
+    }    
+    
+}
+```
+
+
 License: LGPL v3