add more parameters on button press

aqi.ino

@@ -6,6 +6,7 @@
 SensirionI2CSen44 sen44;
 // initialize the library with the numbers of the interface pins
 LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
+const int buttonPin = 6;
 
 float heatIndex(float t, float rh) {
     float hi = 0.0;
@@ -44,6 +45,9 @@ void setup() {
     // set up the LCD's number of columns and rows:
     lcd.begin(16, 2);
 
+    // set up the button pin
+    pinMode(buttonPin, INPUT_PULLUP);
+
     Wire.begin();
 
     uint16_t error;
@@ -104,6 +108,23 @@ void loop() {
 
     lcd.clear();
 
+    if (digitalRead(buttonPin) == LOW) {
+        lcd.setCursor(0, 0);
+        lcd.print("1:");
+        lcd.print(massConcentrationPm1p0);
+
+        lcd.setCursor(8, 0);
+        lcd.print("2:");
+        lcd.print(massConcentrationPm2p5);
+
+        lcd.setCursor(0, 1);
+        lcd.print("4:");
+        lcd.print(massConcentrationPm4p0);
+
+        lcd.setCursor(8, 1);
+        lcd.print("10:");
+        lcd.print(massConcentrationPm10p0);
+    } else {
         lcd.setCursor(0, 0);
         lcd.print("t:");
         lcd.print(round(ambientTemperature));
@@ -119,6 +140,7 @@ void loop() {
         lcd.setCursor(8, 1);
         lcd.print("v:");
         lcd.print(vocIndex, 0);
+    }
 
     //Serial.println("------------");
     //Serial.print("Voc:");