Added Serial port check to all examples using Serial statements in the setup

libraries/Ethernet/examples/ChatServer/ChatServer.ino

@@ -12,7 +12,7 @@
  
  created 18 Dec 2009
  by David A. Mellis
- modified 12 March 2012
+ modified 2 Apr 2012
  by Tom Igoe
  
  */
@@ -39,8 +39,10 @@ void setup() {
   Ethernet.begin(mac, ip, gateway, subnet);
   // start listening for clients
   server.begin();
-  // open the serial port
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
   Serial.print("Chat server address:");
   Serial.println(Ethernet.localIP());
 }

libraries/Ethernet/examples/DhcpAddressPrinter/DhcpAddressPrinter.ino

@@ -9,6 +9,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 12 April 2011
+ modified 2 Apr 2012
  by Tom Igoe
  
  */
@@ -27,8 +28,10 @@ byte mac[] = {
 EthernetClient client;
 
 void setup() {
-  // start the serial library:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
   // start the Ethernet connection:
   if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");

libraries/Ethernet/examples/DhcpChatServer/DhcpChatServer.ino

@@ -12,6 +12,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 21 May 2011
+ modified 2 Apr 2012
  by Tom Igoe
  Based on ChatServer example by David A. Mellis
  
@@ -34,8 +35,10 @@ EthernetServer server(23);
 boolean gotAMessage = false; // whether or not you got a message from the client yet
 
 void setup() {
-   // open the serial port
+  // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
   // start the Ethernet connection:
   Serial.println("Trying to get an IP address using DHCP");
   if (Ethernet.begin(mac) == 0) {

libraries/Ethernet/examples/DnsWebClient/DnsWebClient.ino

@@ -9,7 +9,7 @@
  
  created 18 Dec 2009
  by David A. Mellis
- modified 12 April 2011
+ modified 2 Apr 2012
  by Tom Igoe, based on work by Adrian McEwen
  
  */
@@ -28,8 +28,10 @@ char serverName[] = "www.google.com";
 EthernetClient client;
 
 void setup() {
-  // start the serial library:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
   // start the Ethernet connection:
   if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");

libraries/Ethernet/examples/PachubeClient/PachubeClient.ino

@@ -16,7 +16,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 15 March 2010
- updated 16 Mar 2012
+ modified 2 Apr 2012
  by Tom Igoe with input from Usman Haque and Joe Saavedra
  
 http://arduino.cc/en/Tutorial/PachubeClient
@@ -53,8 +53,10 @@ boolean lastConnected = false;                 // state of the connection last t
 const unsigned long postingInterval = 10*1000; //delay between updates to Pachube.com
 
 void setup() {
-  // start serial port:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
  // start the Ethernet connection:
   if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");

libraries/Ethernet/examples/PachubeClientString/PachubeClientString.ino

@@ -18,7 +18,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 15 March 2010
- updated 16 Mar 2012
+ modified 2 Apr 2012
  by Tom Igoe with input from Usman Haque and Joe Saavedra
  
  http://arduino.cc/en/Tutorial/PachubeClientString
@@ -55,8 +55,10 @@ boolean lastConnected = false;                 // state of the connection last t
 const unsigned long postingInterval = 10*1000;  //delay between updates to Pachube.com
 
 void setup() {
-  // start serial port:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
   // give the ethernet module time to boot up:
   delay(1000);
   // start the Ethernet connection:

libraries/Ethernet/examples/TelnetClient/TelnetClient.ino

@@ -13,6 +13,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 14 Sep 2010
+ modified 2 Apr 2012
  by Tom Igoe
  
  */
@@ -38,8 +39,10 @@ EthernetClient client;
 void setup() {
   // start the Ethernet connection:
   Ethernet.begin(mac, ip);
-  // start the serial library:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
   // give the Ethernet shield a second to initialize:
   delay(1000);
   Serial.println("connecting...");

libraries/Ethernet/examples/TwitterClient/TwitterClient.ino

@@ -17,6 +17,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 21 May 2011
+ modified 2 Apr 2012
  by Tom Igoe
  
  This code is in the public domain.
@@ -51,8 +52,10 @@ void setup() {
   currentLine.reserve(256);
   tweet.reserve(150);
 
-  // initialize serial:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
   // attempt a DHCP connection:
   Serial.println("Attempting to get an IP address using DHCP:");
   if (!Ethernet.begin(mac)) {

libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino

@@ -9,7 +9,7 @@
  
  created 4 Sep 2010 
  by Michael Margolis
- modified 17 Sep 2010
+ modified 2 Apr 2012
  by Tom Igoe
  
  This code is in the public domain.
@@ -38,7 +38,9 @@ EthernetUDP Udp;
 
 void setup() 
 {
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
 
   // start Ethernet and UDP
   if (Ethernet.begin(mac) == 0) {

libraries/Ethernet/examples/WebClient/WebClient.ino

@@ -8,6 +8,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 18 Dec 2009
+ modified 2 Apr 2012
  by David A. Mellis
  
  */
@@ -26,8 +27,10 @@ IPAddress server(173,194,33,104); // Google
 EthernetClient client;
 
 void setup() {
-  // start the serial library:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
   // start the Ethernet connection:
   if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");

libraries/Ethernet/examples/WebServer/WebServer.ino

@@ -10,7 +10,7 @@
  
  created 18 Dec 2009
  by David A. Mellis
- modified 20 Mar 2012
+ modified 2 Apr 2012
  by Tom Igoe
  
  */
@@ -30,7 +30,10 @@ IPAddress ip(192,168,1, 177);
 EthernetServer server(80);
 
 void setup() {
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while(!Serial) ;
+
   // start the Ethernet connection and the server:
   Ethernet.begin(mac, ip);
   server.begin();