diff --git a/README.md b/README.md
index 869c17f..c88e4d3 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,8 @@ ArdunioManager arduino = ArduinoManager(); // required if you want to know the b
 void setup() {
   unsigned long M = 1000000;
   unsigned int k = 1000;
+  while(!Serial);
+  while(!Serial1);
   Serial.begin(9600);
   
   // The Arduino board name
diff --git a/examples/featuresniffer/featuresniffer.ino b/examples/featuresniffer/featuresniffer.ino
index a4b6f41..d876bbf 100644
--- a/examples/featuresniffer/featuresniffer.ino
+++ b/examples/featuresniffer/featuresniffer.ino
@@ -6,6 +6,8 @@ Arduino arduino = Arduino();
 void setup() {
   unsigned long M = 1000000;
   unsigned int k = 1000;
+  while(!Serial);
+  while(!Serial1);
   Serial.begin(9600);
   
   // The Arduino board name