some improvements

aqi.ino

@@ -4,7 +4,6 @@
 #include <LiquidCrystal.h>
 
 SensirionI2CSen44 sen44;
-// initialize the library with the numbers of the interface pins
 LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
 const int buttonPin = 6;
 
@@ -28,7 +27,8 @@ float ambientTemperature         = 0;
 float feelsLikeTemperature       = 0;
 
 // calculate heat index
-float heatIndex(float t, float rh) {
+float heatIndex(float t, float rh) 
+{
     float hi = 0.0;
     if (t <= 40.0)
         hi = t;
@@ -53,11 +53,13 @@ float heatIndex(float t, float rh) {
 }
 
 // convert celcius to fahrenheit
-float celsiusToFahrenheit(float degrees) {
+float celsiusToFahrenheit(float degrees) 
+{
     return degrees * 1.8 + 32;
 }
 
-void setup() {
+void setup() 
+{
     Serial.begin(115200);
     while (!Serial)
         delay(100);
@@ -95,19 +97,16 @@ void setup() {
     sen44.startFanCleaning();
 }
 
-void loop() {
+void loop() 
+{
     currentTime = millis();
 
-    delay(50);
+    if (currentTime - buttonTime >= 500) {
-
-    // Display Button
-    if (currentTime - buttonTime >= 100) {
         buttonTime = currentTime;
 
-        if (digitalRead(buttonPin) == LOW) {
+        if (digitalRead(buttonPin) == LOW)
             isStandardValues = !isStandardValues;
     }
-    }
 
     // sen44
     if (currentTime - sen44Time >= 1000) {
@@ -134,7 +133,7 @@ void loop() {
     }
 
     // Display
-    if (currentTime - lcdTime >= 500) {
+    if (currentTime - lcdTime >= 2000) {
         lcdTime = currentTime;
 
         lcd.clear();