Update.

example/udp_demo.wren

@@ -0,0 +1,60 @@
+// retoor <retoor@molodetz.nl>
+
+import "udp" for UdpSocket, UdpMessage
+import "timer" for Timer
+import "scheduler" for Scheduler
+
+System.print("=== UDP Module Demo ===\n")
+
+System.print("--- Basic UDP Echo Server ---")
+
+var server = UdpSocket.new()
+server.bind("127.0.0.1", 8888)
+System.print("Server listening on %(server.localAddress):%(server.localPort)")
+
+var client = UdpSocket.new()
+client.bind("127.0.0.1", 0)
+System.print("Client bound to %(client.localAddress):%(client.localPort)")
+
+var messageCount = 0
+var maxMessages = 3
+
+Scheduler.add {
+    while (messageCount < maxMessages) {
+        var msg = server.receive()
+        if (msg == null) break
+
+        System.print("Server received: '%(msg[0])' from %(msg[1]):%(msg[2])")
+
+        server.send("Echo: %(msg[0])", msg[1], msg[2])
+        messageCount = messageCount + 1
+    }
+    server.close()
+    System.print("Server closed")
+}
+
+Scheduler.add {
+    var messages = ["Hello", "UDP", "World"]
+    for (m in messages) {
+        client.send(m, "127.0.0.1", 8888)
+        System.print("Client sent: '%(m)'")
+
+        var response = client.receive()
+        if (response != null) {
+            System.print("Client received: '%(response[0])'")
+        }
+    }
+    client.close()
+    System.print("Client closed")
+}
+
+Timer.sleep(500)
+
+System.print("\n--- Broadcast Configuration ---")
+var bcast = UdpSocket.new()
+bcast.bind("0.0.0.0", 0)
+bcast.setBroadcast(true)
+System.print("Broadcast enabled on port %(bcast.localPort)")
+bcast.close()
+
+System.print("\nDemo complete!")