diff --git a/Examples/FFT_01/FFT_01.ino b/Examples/FFT_01/FFT_01.ino
index caefe80..ffeb852 100644
--- a/Examples/FFT_01/FFT_01.ino
+++ b/Examples/FFT_01/FFT_01.ino
@@ -53,6 +53,7 @@ double vImag[samples];
 void setup()
 {
   Serial.begin(115200);
+  while(!Serial);
   Serial.println("Ready");
 }
 
diff --git a/Examples/FFT_02/FFT_02.ino b/Examples/FFT_02/FFT_02.ino
index cb97e29..b621db3 100644
--- a/Examples/FFT_02/FFT_02.ino
+++ b/Examples/FFT_02/FFT_02.ino
@@ -53,6 +53,7 @@ unsigned long time;
 void setup()
 {
   Serial.begin(115200);
+  while(!Serial);
   Serial.println("Ready");
   exponent = FFT.Exponent(samples);
 }
diff --git a/Examples/FFT_03/FFT_03.ino b/Examples/FFT_03/FFT_03.ino
index 9e1640c..1e59279 100644
--- a/Examples/FFT_03/FFT_03.ino
+++ b/Examples/FFT_03/FFT_03.ino
@@ -47,6 +47,7 @@ void setup()
 {
   sampling_period_us = round(1000000*(1.0/samplingFrequency));
   Serial.begin(115200);
+  while(!Serial);
   Serial.println("Ready");
 }
 
diff --git a/Examples/FFT_04/FFT_04.ino b/Examples/FFT_04/FFT_04.ino
index 5c1fcd5..66d03b5 100644
--- a/Examples/FFT_04/FFT_04.ino
+++ b/Examples/FFT_04/FFT_04.ino
@@ -54,6 +54,8 @@ double vImag[samples];
 void setup()
 {
   Serial.begin(115200);
+  while(!Serial);
+  Serial.println("Ready");
 }
 
 void loop()
diff --git a/Examples/FFT_05/FFT_05.ino b/Examples/FFT_05/FFT_05.ino
index 7abe3b6..599616a 100644
--- a/Examples/FFT_05/FFT_05.ino
+++ b/Examples/FFT_05/FFT_05.ino
@@ -54,6 +54,7 @@ double vImag[samples];
 void setup()
 {
   Serial.begin(115200);
+  while(!Serial);
   Serial.println("Ready");
 }