htu21 sensor

platformio.ini

@@ -8,10 +8,12 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
+; nanoatmega328new
+
 [env:arduino]
 platform = atmelavr
-board = nanoatmega328new
+board = uno
 framework = arduino
 lib_deps =
-     adafruit/Adafruit BME280 Library @ ^2.1.2
-;      miguel5612/MQUnifiedsensor @ ^2.0.1
+     ; adafruit/Adafruit BME280 Library @ ^2.1.2
+     sparkfun/SparkFun HTU21D Humidity and Temperature Sensor Breakout @ ^1.1.3

src/main.cpp

@@ -1,8 +1,8 @@
 #include <Arduino.h>
 #include <MQ135.h>
-#include <Adafruit_BME280.h>
+#include <SparkFunHTU21D.h>
 
-#define PIN_MQ135 A7
+#define PIN_MQ135 A0
 #define PIN_NOISE 2
 #define PIN_LED_GREEN 3
 #define PIN_LED_GREEN2 4
@@ -11,95 +11,52 @@
 #define PIN_LED_RED 7
 #define PIN_LED_RED2 8
 
-void printValues();
-
-const int maxCount = 10;
-int count = 0;
-bool noise = false;
-bool noiseActive = false;
-
-float ppm;
-
 MQ135 co2_sensor(PIN_MQ135);
-Adafruit_BME280 bme;
+HTU21D envSensor;
 
 void setup() {
-  pinMode(PIN_LED_GREEN, OUTPUT);
-  pinMode(PIN_LED_GREEN2, OUTPUT);
-  pinMode(PIN_LED_YELLOW, OUTPUT);
-  pinMode(PIN_LED_YELLOW2, OUTPUT);
-  pinMode(PIN_LED_RED, OUTPUT);
-  pinMode(PIN_LED_RED2, OUTPUT);
-  pinMode(PIN_NOISE, OUTPUT);
   Serial.begin(9600);
-  co2_sensor.setR0(300);
 
-  if (!bme.begin(0x76)) {
-    Serial.println(F("Could not find a valid BME280 sensor, check wiring!"));
-  }
+  co2_sensor.setR0(200);
+
+  envSensor.begin();
 }
 
 void loop() {
-  if (count >= maxCount || count < 0) {
-    float temp = bme.readTemperature();
-    float humidity = bme.readHumidity();
-    ppm = co2_sensor.getCorrectedCO2(temp, humidity);
-    
-    count = 0;
-    noiseActive = false;
-    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);
+  float temp = envSensor.readTemperature();
+  float humidity = envSensor.readHumidity();
 
-    if (ppm < 1000) {
-      digitalWrite(PIN_LED_GREEN, 1);
-      if (ppm > 750) {
-        digitalWrite(PIN_LED_GREEN2, 1);
-      }
-    }
-    if (ppm > 1000 && ppm <= 2000) {
-      digitalWrite(PIN_LED_YELLOW, 1);
-      if (ppm > 1500) {
-        digitalWrite(PIN_LED_YELLOW2, 1);
-      }
-    }
-    if (ppm > 2000) {
-      digitalWrite(PIN_LED_RED, 1);
-      if (ppm > 2500) {
-        noiseActive = true;
-        digitalWrite(PIN_LED_RED2, 1);
-      }
-    }
+  float r0c = co2_sensor.getCorrectedR0(temp, humidity);
+  float in = analogRead(PIN_MQ135);
+  double v = co2_sensor.getVoltage();
+  double r = co2_sensor.getResistance();
+  float r0 = co2_sensor.getR0();
 
-    printValues();
-  }
+  double co2 = co2_sensor.getCO2();
+  double co2c = co2_sensor.getCorrectedCO2(temp, humidity);
 
-  if (noiseActive) {
-    noise = !noise;
-    // digitalWrite(PIN_NOISE, noise);
-  }
-  else {
-    // digitalWrite(PIN_NOISE, 0);
-  }
+  Serial.print("Analog Read: ");
+  Serial.println(in);
+  Serial.print("Voltage: ");
+  Serial.println(v);
+  Serial.print("Resistance: ");
+  Serial.println(r);
 
-  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);
-  Serial.print("ppm: ");
-  Serial.println(ppm);
+  Serial.print("R0: ");
+  Serial.println(r0);
   Serial.print("Temperature: ");
   Serial.println(temp);
   Serial.print("Humidity: ");
   Serial.println(humidity);
-  Serial.print("corrected ppm: ");
-  Serial.println(cppm);
+  Serial.print("R0 Corrected: ");
+  Serial.println(r0c);
+
+  Serial.print("CO2: ");
+  Serial.println(co2);
+  Serial.print("CO2 Corrected: ");
+  Serial.println(co2c);
+
+  Serial.println("-----------------------------");
+
+  delay(1000);
 }