Update lcd on button click.

aqi.ino

@@ -72,11 +72,11 @@ void setup()
 
     Wire.begin();
 
+    sen44.begin(Wire);
+
     uint16_t error;
     char errorMessage[256];
 
-    sen44.begin(Wire);
-
     error = sen44.deviceReset();
     if (error) {
         Serial.print("Error trying to execute getSerialNumber(): ");
@@ -95,47 +95,17 @@ void setup()
 
     // Clean Fan
     sen44.startFanCleaning();
+
+    // calibrate
+    lcd.setCursor(0, 0);
+    lcd.print(" calibrating...");
+
+    // allow 2 minute calibration
+    delay(120000);
 }
 
-void loop() 
+void update_lcd()
 {
-    currentTime = millis();
-
-    if (currentTime - buttonTime >= 500) {
-        buttonTime = currentTime;
-
-        if (digitalRead(buttonPin) == LOW)
-            isStandardValues = !isStandardValues;
-    }
-
-    // sen44
-    if (currentTime - sen44Time >= 1000) {
-        sen44Time = currentTime;
-
-        uint16_t error;
-        char errorMessage[256];
-
-        // Read Measurement
-        error = sen44.readMeasuredMassConcentrationAndAmbientValues(
-                massConcentrationPm1p0, massConcentrationPm2p5, massConcentrationPm4p0,
-                massConcentrationPm10p0, vocIndex, ambientHumidity, ambientTemperature);
-
-        if (error) {
-            Serial.print("Error trying to execute "
-                         "readMeasuredMassConcentrationAndAmbientValues(): ");
-            errorToString(error, errorMessage, 256);
-            Serial.println(errorMessage);
-            return;
-        }
-
-        ambientTemperature = celsiusToFahrenheit(ambientTemperature);
-        feelsLikeTemperature = heatIndex(ambientTemperature, ambientHumidity);
-    }
-
-    // Display
-    if (currentTime - lcdTime >= 2000) {
-        lcdTime = currentTime;
-
     lcd.clear();
 
     if (isStandardValues) {
@@ -172,4 +142,48 @@ void loop()
         lcd.print(massConcentrationPm10p0);
     }
 }
+
+void loop() 
+{
+    currentTime = millis();
+
+    // modes button
+    if (currentTime - buttonTime >= 100) {
+        buttonTime = currentTime;
+
+        if (digitalRead(buttonPin) == LOW) {
+            isStandardValues = !isStandardValues;
+            update_lcd();
+        }
+    }
+
+    // sen44
+    if (currentTime - sen44Time >= 1000) {
+        sen44Time = currentTime;
+
+        uint16_t error;
+        char errorMessage[256];
+
+        // Read Measurement
+        error = sen44.readMeasuredMassConcentrationAndAmbientValues(
+                massConcentrationPm1p0, massConcentrationPm2p5, massConcentrationPm4p0,
+                massConcentrationPm10p0, vocIndex, ambientHumidity, ambientTemperature);
+
+        if (error) {
+            Serial.print("Error trying to execute "
+                         "readMeasuredMassConcentrationAndAmbientValues(): ");
+            errorToString(error, errorMessage, 256);
+            Serial.println(errorMessage);
+            return;
+        }
+
+        ambientTemperature = celsiusToFahrenheit(ambientTemperature);
+        feelsLikeTemperature = heatIndex(ambientTemperature, ambientHumidity);
+    }
+
+    // Display
+    if (currentTime - lcdTime >= 2000) {
+        lcdTime = currentTime;
+        update_lcd();
+    }
 }