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-rw-r--r--libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino7
1 files changed, 6 insertions, 1 deletions
diff --git a/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino b/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino
index b4e24b8..93ffe39 100644
--- a/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino
+++ b/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino
@@ -9,7 +9,7 @@
created 4 Sep 2010
by Michael Margolis
- modified 17 Sep 2010
+ modified 9 Apr 2012
by Tom Igoe
This code is in the public domain.
@@ -38,7 +38,12 @@ EthernetUDP Udp;
void setup()
{
+ // Open serial communications and wait for port to open:
Serial.begin(9600);
+ while (!Serial) {
+ ; // wait for serial port to connect. Needed for Leonardo only
+ }
+
// start Ethernet and UDP
if (Ethernet.begin(mac) == 0) {