1 files changed, 7 insertions, 1 deletions
diff --git a/libraries/Ethernet/examples/DhcpAddressPrinter/DhcpAddressPrinter.ino b/libraries/Ethernet/examples/DhcpAddressPrinter/DhcpAddressPrinter.ino
index 630dd17..5eaaf24 100644
--- a/libraries/Ethernet/examples/DhcpAddressPrinter/DhcpAddressPrinter.ino
+++ b/libraries/Ethernet/examples/DhcpAddressPrinter/DhcpAddressPrinter.ino
@@ -9,6 +9,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 12 April 2011
+ modified 9 Apr 2012
  by Tom Igoe
  
  */
@@ -27,8 +28,13 @@ byte mac[] = {
 EthernetClient client;
 
 void setup() {
-  // start the serial library:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  // this check is only needed on the Leonardo:
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
   // start the Ethernet connection:
   if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");