fix loading + htu21 sensor

platformio.ini

@@ -13,5 +13,6 @@ platform = atmelavr
 board = nanoatmega328new
 framework = arduino
 lib_deps =
-     adafruit/Adafruit BME280 Library @ ^2.1.2
+     ; adafruit/Adafruit BME280 Library @ ^2.1.2
 ;      miguel5612/MQUnifiedsensor @ ^2.0.1
+     sparkfun/SparkFun HTU21D Humidity and Temperature Sensor Breakout @ ^1.1.3

src/main.cpp

@@ -1,6 +1,6 @@
 #include <Arduino.h>
 #include <MQ135.h>
-#include <Adafruit_BME280.h>
+#include <SparkFunHTU21D.h>
 
 #define PIN_MQ135 A7
 #define PIN_NOISE 2
@@ -11,17 +11,22 @@
 #define PIN_LED_RED 7
 #define PIN_LED_RED2 8
 
-void printValues();
+void printValues(float ppm, float temp, float humidity);
 
 const int maxCount = 10;
 int count = 0;
+
 bool noise = false;
 bool noiseActive = false;
 
-float ppm;
+// loading
+bool loading = true;
+int firstRead;
+const int loadingDelay = 200;
+int loadingCount = 30000 / loadingDelay;
 
 MQ135 co2_sensor(PIN_MQ135);
-Adafruit_BME280 bme;
+HTU21D envSensor;
 
 void setup() {
   pinMode(PIN_LED_GREEN, OUTPUT);
@@ -32,18 +37,83 @@ void setup() {
   pinMode(PIN_LED_RED2, OUTPUT);
   pinMode(PIN_NOISE, OUTPUT);
   Serial.begin(9600);
-  co2_sensor.setR0(300);
+  co2_sensor.setR0(200);
 
-  if (!bme.begin(0x76)) {
-    Serial.println(F("Could not find a valid BME280 sensor, check wiring!"));
-  }
+  // if (!bme.begin(0x76)) {
+  //   Serial.println(F("Could not find a valid BME280 sensor, check wiring!"));
+  // }
+  envSensor.begin();
 }
 
 void loop() {
+  if (loading) {
+    if (loadingCount <= 0) {
+      loading = false;
+      count = -1;
+      return;
+    }
+
+    int temp = analogRead(PIN_MQ135);
+    if (temp > firstRead) {
+      firstRead = temp;
+    }
+    else if (temp < (firstRead - 100) && loadingCount > 10) {
+      loadingCount = 10;
+    }
+
+    digitalWrite(PIN_LED_GREEN, 0);
+    digitalWrite(PIN_LED_GREEN2, 0);
+    digitalWrite(PIN_LED_YELLOW, 0);
+    digitalWrite(PIN_LED_YELLOW2, 0);
+    digitalWrite(PIN_LED_RED, 0);
+    digitalWrite(PIN_LED_RED2, 0);
+
+    switch (count)
+    {
+      case 1:
+        digitalWrite(PIN_LED_RED2, 1);
+        break;
+      case 2:
+        digitalWrite(PIN_LED_RED, 1);
+        digitalWrite(PIN_LED_RED2, 1);
+        break;
+      case 3:
+        digitalWrite(PIN_LED_RED, 1);
+        digitalWrite(PIN_LED_YELLOW2, 1);
+        break;
+      case 4:
+        digitalWrite(PIN_LED_YELLOW2, 1);
+        digitalWrite(PIN_LED_YELLOW, 1);
+        break;
+      case 5:
+        digitalWrite(PIN_LED_YELLOW, 1);
+        digitalWrite(PIN_LED_GREEN2, 1);
+        break;
+      case 6:
+        digitalWrite(PIN_LED_GREEN2, 1);
+        digitalWrite(PIN_LED_GREEN, 1);
+        break;
+      case 7:
+        digitalWrite(PIN_LED_GREEN, 1);
+        break;
+      case 10:
+        count = 0;
+        break;
+      
+      default:
+        break;
+    }
+
+    loadingCount--;
+    count++;
+    delay(loadingDelay);
+    return;
+  }
+
   if (count >= maxCount || count < 0) {
-    float temp = bme.readTemperature();
-    float humidity = bme.readHumidity();
-    ppm = co2_sensor.getCorrectedCO2(temp, humidity);
+    float temp = envSensor.readTemperature();
+    float humidity = envSensor.readHumidity();
+    float ppm = co2_sensor.getCorrectedCO2(temp, humidity);
     
     count = 0;
     noiseActive = false;
@@ -54,52 +124,48 @@ void loop() {
     digitalWrite(PIN_LED_RED, 0);
     digitalWrite(PIN_LED_RED2, 0);
 
-    if (ppm < 1000) {
+    if (ppm < 900) {
       digitalWrite(PIN_LED_GREEN, 1);
-      if (ppm > 750) {
+    }
+    if (ppm > 750 && ppm < 1100) {
       digitalWrite(PIN_LED_GREEN2, 1);
     }
-    }
-    if (ppm > 1000 && ppm <= 2000) {
+    if (ppm > 900 && ppm < 1900) {
       digitalWrite(PIN_LED_YELLOW, 1);
-      if (ppm > 1500) {
+    }
+    if (ppm > 1500 && ppm < 2200) {
       digitalWrite(PIN_LED_YELLOW2, 1);
     }
-    }
-    if (ppm > 2000) {
+    if (ppm > 2000 && ppm < 2800) {
       digitalWrite(PIN_LED_RED, 1);
+    }
     if (ppm > 2500) {
-        noiseActive = true;
       digitalWrite(PIN_LED_RED2, 1);
     }
+    if (ppm > 3000) {
+      noiseActive = true;
     }
 
-    printValues();
+    printValues(ppm, temp, humidity);
   }
 
   if (noiseActive) {
     noise = !noise;
-    // digitalWrite(PIN_NOISE, noise);
+    digitalWrite(PIN_NOISE, noise);
   }
   else {
-    // digitalWrite(PIN_NOISE, 0);
+    digitalWrite(PIN_NOISE, 0);
   }
 
   delay(100);
   count++;
 }
 
-void printValues() {
-  float temp = bme.readTemperature();
-  float humidity = bme.readHumidity();
-  float ppm = co2_sensor.getCO2();
-  float cppm = co2_sensor.getCorrectedCO2(temp, humidity);
+void printValues(float ppm, float temp, float humidity) {
   Serial.print("ppm: ");
   Serial.println(ppm);
   Serial.print("Temperature: ");
   Serial.println(temp);
   Serial.print("Humidity: ");
   Serial.println(humidity);
-  Serial.print("corrected ppm: ");
-  Serial.println(cppm);
 }