1 files changed, 58 insertions, 0 deletions
diff --git a/learning_examples/MQ135_DHTxx_esp32_CRAP/MQ135_DHTxx_esp32.ino b/learning_examples/MQ135_DHTxx_esp32_CRAP/MQ135_DHTxx_esp32.ino
new file mode 100644
index 0000000..51b14f1
--- /dev/null
+++ b/learning_examples/MQ135_DHTxx_esp32_CRAP/MQ135_DHTxx_esp32.ino
@@ -0,0 +1,58 @@
+#include <MQ135.h>
+#include <DHT.h>
+
+/* MQ135 + DHT Temp Sensor
+
+   Combination of the MQ135 air quality sensor and a DHT11/22 temperature sensor to accurately measure ppm values through the library correction.
+   Uses the Adafruit DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
+
+   Written by: https://github.com/NuclearPhoenixx/MQ135
+*/
+
+#define PIN_MQ135 15 // MQ135 Analog Input Pin
+#define DHTPIN 23 // DHT Digital Input Pin
+#define DHTTYPE DHT11 // DHT11 or DHT22, depends on your sensor
+
+MQ135 mq135_sensor(PIN_MQ135);
+DHT dht(DHTPIN, DHTTYPE);
+
+float temperature, humidity; // Temp and Humid floats, will be measured by the DHT
+
+void setup() {
+  Serial.begin(9600);
+
+  dht.begin();
+}
+
+void loop() {
+  // Serial.println("aaaaaaaaaaaaaaaaaa");
+  humidity = dht.readHumidity();
+  temperature = dht.readTemperature();
+
+  // Check if any reads failed and exit early (to try again).
+  if (isnan(humidity) || isnan(temperature)) {
+    Serial.println(F("Failed to read from DHT sensor!"));
+    return;
+  }
+
+  float rzero = mq135_sensor.getRZero();
+  float correctedRZero = mq135_sensor.getCorrectedRZero(temperature, humidity);
+  float resistance = mq135_sensor.getResistance();
+  float ppm = mq135_sensor.getPPM();
+  float correctedPPM = mq135_sensor.getCorrectedPPM(temperature, humidity);
+
+  Serial.print("MQ135 RZero: ");
+  Serial.print(rzero);
+  Serial.print("\t Corrected RZero: ");
+  Serial.print(correctedRZero);
+  Serial.print("\t Resistance: ");
+  Serial.print(resistance);
+  Serial.print("\t PPM: ");
+  Serial.print(ppm);
+  Serial.print("ppm");
+  Serial.print("\t Corrected PPM: ");
+  Serial.print(correctedPPM);
+  Serial.println("ppm");
+
+  delay(300);
+}
+\ No newline at end of file