diff --git a/examples/LinearVsExponential/LinearVsExponential.ino b/examples/LinearVsExponential/LinearVsExponential.ino
index 03cb9ed..6de24f4 100644
--- a/examples/LinearVsExponential/LinearVsExponential.ino
+++ b/examples/LinearVsExponential/LinearVsExponential.ino
@@ -48,7 +48,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ4.calibrate(RatioMQ4CleanAir);
diff --git a/examples/MQ-131/MQ-131.ino b/examples/MQ-131/MQ-131.ino
index 86cc02f..963846e 100644
--- a/examples/MQ-131/MQ-131.ino
+++ b/examples/MQ-131/MQ-131.ino
@@ -58,7 +58,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ131.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ131.calibrate(RatioMQ131CleanAir);
diff --git a/examples/MQ-135/MQ-135.ino b/examples/MQ-135/MQ-135.ino
index 9dd7017..380c8a8 100644
--- a/examples/MQ-135/MQ-135.ino
+++ b/examples/MQ-135/MQ-135.ino
@@ -61,7 +61,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ135.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ135.calibrate(RatioMQ135CleanAir);
diff --git a/examples/MQ-2/MQ-2.ino b/examples/MQ-2/MQ-2.ino
index 692a3bd..e14e561 100644
--- a/examples/MQ-2/MQ-2.ino
+++ b/examples/MQ-2/MQ-2.ino
@@ -57,7 +57,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ2.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ2.calibrate(RatioMQ2CleanAir);
diff --git a/examples/MQ-3/MQ-3.ino b/examples/MQ-3/MQ-3.ino
index 3800a93..fad19c7 100644
--- a/examples/MQ-3/MQ-3.ino
+++ b/examples/MQ-3/MQ-3.ino
@@ -60,7 +60,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ3.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ3.calibrate(RatioMQ3CleanAir);
diff --git a/examples/MQ-303A/MQ303.ino b/examples/MQ-303A/MQ303.ino
index e3f84d8..fc0e0d8 100644
--- a/examples/MQ-303A/MQ303.ino
+++ b/examples/MQ-303A/MQ303.ino
@@ -58,7 +58,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ303.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ303.calibrate(RatioMQ303CleanAir);
diff --git a/examples/MQ-309A/MQ-309.ino b/examples/MQ-309A/MQ-309.ino
index 04f25fd..1966ada 100644
--- a/examples/MQ-309A/MQ-309.ino
+++ b/examples/MQ-309A/MQ-309.ino
@@ -59,7 +59,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ309.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ309.calibrate(RatioMQ309CleanAir);
diff --git a/examples/MQ-4-ALL/MQ-4-ALL.ino b/examples/MQ-4-ALL/MQ-4-ALL.ino
index 8279a61..d969af4 100644
--- a/examples/MQ-4-ALL/MQ-4-ALL.ino
+++ b/examples/MQ-4-ALL/MQ-4-ALL.ino
@@ -50,7 +50,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ4.calibrate(RatioMQ4CleanAir);
diff --git a/examples/MQ-4-LINEAR/MQ-4-LINEAR.ino b/examples/MQ-4-LINEAR/MQ-4-LINEAR.ino
index 3e3e704..4210384 100644
--- a/examples/MQ-4-LINEAR/MQ-4-LINEAR.ino
+++ b/examples/MQ-4-LINEAR/MQ-4-LINEAR.ino
@@ -50,7 +50,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ4.calibrate(RatioMQ4CleanAir);
diff --git a/examples/MQ-4/MQ-4.ino b/examples/MQ-4/MQ-4.ino
index 7481266..b708157 100644
--- a/examples/MQ-4/MQ-4.ino
+++ b/examples/MQ-4/MQ-4.ino
@@ -60,7 +60,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ4.calibrate(RatioMQ4CleanAir);
diff --git a/examples/MQ-5/MQ-5.ino b/examples/MQ-5/MQ-5.ino
index 4118960..b69ac85 100644
--- a/examples/MQ-5/MQ-5.ino
+++ b/examples/MQ-5/MQ-5.ino
@@ -59,7 +59,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ5.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ5.calibrate(RatioMQ5CleanAir);
diff --git a/examples/MQ-6/MQ-6.ino b/examples/MQ-6/MQ-6.ino
index cbc2476..da8b2c6 100644
--- a/examples/MQ-6/MQ-6.ino
+++ b/examples/MQ-6/MQ-6.ino
@@ -59,7 +59,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ6.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ6.calibrate(RatioMQ6CleanAir);
diff --git a/examples/MQ-7/MQ-7.ino b/examples/MQ-7/MQ-7.ino
index f57899d..7627e24 100644
--- a/examples/MQ-7/MQ-7.ino
+++ b/examples/MQ-7/MQ-7.ino
@@ -60,7 +60,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ7.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ7.calibrate(RatioMQ7CleanAir);
diff --git a/examples/MQ-8/MQ-8.ino b/examples/MQ-8/MQ-8.ino
index 1a3a21a..f60ec3a 100644
--- a/examples/MQ-8/MQ-8.ino
+++ b/examples/MQ-8/MQ-8.ino
@@ -60,7 +60,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ8.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ8.calibrate(RatioMQ8CleanAir);
diff --git a/examples/MQ-9-ALL/MQ-9-ALL.ino b/examples/MQ-9-ALL/MQ-9-ALL.ino
index 0a6a47f..e13c5aa 100644
--- a/examples/MQ-9-ALL/MQ-9-ALL.ino
+++ b/examples/MQ-9-ALL/MQ-9-ALL.ino
@@ -49,7 +49,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ9.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ9.calibrate(RatioMQ9CleanAir);
diff --git a/examples/MQ-9/MQ-9.ino b/examples/MQ-9/MQ-9.ino
index 9c58120..2452bbe 100644
--- a/examples/MQ-9/MQ-9.ino
+++ b/examples/MQ-9/MQ-9.ino
@@ -58,7 +58,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ9.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ9.calibrate(RatioMQ9CleanAir);
diff --git a/examples/MQ-Board/MQ-Board.ino b/examples/MQ-Board/MQ-Board.ino
index 645dfba..668e46c 100644
--- a/examples/MQ-Board/MQ-Board.ino
+++ b/examples/MQ-Board/MQ-Board.ino
@@ -109,7 +109,7 @@ void setup() {
   MQ7calcR0 = 0,
   MQ8calcR0 = 0,
   MQ9calcR0 = 0;
-  for(int i = 0; i<=20; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     //Update the voltage lectures
     MQ2.update();
diff --git a/examples/smokeDetector/smokeDetector.ino b/examples/smokeDetector/smokeDetector.ino
index ba37b91..9344111 100644
--- a/examples/smokeDetector/smokeDetector.ino
+++ b/examples/smokeDetector/smokeDetector.ino
@@ -57,7 +57,7 @@ void setup() {
   // Acknowledgements: https://jayconsystems.com/blog/understanding-a-gas-sensor
   Serial.print("Calibrating please wait.");
   float calcR0 = 0;
-  for(int i = 0; i<=10; i ++)
+  for(int i = 1; i<=10; i ++)
   {
     MQ4.update(); // Update data, the arduino will be read the voltage on the analog pin
     calcR0 += MQ4.calibrate(RatioMQ4CleanAir);