Added DHT22 support.

app/application.cpp

@@ -1,4 +1,5 @@
 #include <SmingCore.h>
+#include <Libraries/DHTesp/DHTesp.h>
 
 ///////////////////////////////////////////////////////////////////
 // Set your SSID & Pass for initial configuration
@@ -10,6 +11,12 @@
 #include "AHTxx.h"
 #include "led_spi.h"
 
+/** DHT22 */
+#define DHT22_PIN 2
+DHTesp dht;
+Timer readTemperatureProcTimer;
+void onTimer_readTemperatures();
+
 Timer procTimer, procRTimer;
 Timer displayTimer, tmpTimer;
 Timer showHighTimer, showLowTimer;
@@ -73,8 +80,12 @@ void init(void) {
 	displayTimer.initializeMs(500, showWatch).start();
 
 	/* AHTxx Sensor */
-	AHTxx_Init();
-	procTimer.initializeMs(2000, GetData).start();
+//	AHTxx_Init();
+//	procTimer.initializeMs(2000, GetData).start();
+
+	/* DHT22 */
+	dht.setup(DHT22_PIN, DHTesp::DHT22);
+	readTemperatureProcTimer.initializeMs(5 * 1000, onTimer_readTemperatures).start(); // every so often.
 }
 
 void showWatch(void) {
@@ -251,3 +262,95 @@ void onNtpReceive(NtpClient& client, time_t timestamp)
 	NTPLastUpdate = SystemClock.now();
 	Serial.println("*** Time synchronized OK! ***"); // DEBUG
 }
+
+void onTimer_readTemperatures()
+{
+	//* try different reading methods (Adafruit compatible) vs improved */
+	static bool toggle = false;
+	toggle = !toggle;
+	float humidity = 0;
+	float temperature = 0;
+	Serial << _F("TickCount=") << RTC.getRtcNanoseconds() / 1000000 << endl;
+	if(toggle) {
+		Serial.println(_F("Read using Adafruit API methods"));
+		humidity = dht.getHumidity();
+		temperature = dht.getTemperature();
+
+		// check if returns are valid, if they are NaN (not a number) then something went wrong!
+		if(dht.getStatus() == DHTesp::ERROR_NONE) {
+			Serial << _F("\tHumidity: ") << humidity << _F("% Temperature: ") << temperature << " °C" << endl;
+		} else {
+			Serial << _F("Failed to read from DHT: ") << dht.getStatus() << endl;
+		}
+	} else {
+		//* improved reading method
+		Serial.println(_F("\r\n"
+						  "Read using new API methods"));
+		TempAndHumidity th = dht.getTempAndHumidity();
+		humidity = th.humidity;
+		temperature = th.temperature;
+
+		if(dht.getStatus() == DHTesp::ERROR_NONE) {
+			Serial << _F("\tHumidity: ") << th.humidity << _F("% Temperature: ") << th.temperature << " °C" << endl;
+		} else {
+			Serial << _F("Failed to read from DHT: ") << dht.getStatus() << endl;
+		}
+	}
+
+	//  Other goodies:
+	//
+	//  Heatindex is the perceived temperature taking humidity into account
+	//  More: https://en.wikipedia.org/wiki/Heat_index
+	//
+	Serial << _F("Heatindex: ") << dht.computeHeatIndex(temperature, humidity) << " °C" << endl;
+
+	//
+	//  Dewpoint is the temperature where condensation starts.
+	//  Water vapors will start condensing on an object having this temperature or below.
+	//  More: https://en.wikipedia.org/wiki/Dew_point
+	//
+	Serial << _F("Dewpoint: ") << dht.computeDewPoint(temperature, humidity) << " °C" << endl;
+
+	//
+	// Determine thermal comfort according to http://epb.apogee.net/res/refcomf.asp
+	//
+	ComfortState cf;
+
+	Serial << _F("Comfort is at ") << dht.getComfortRatio(cf, temperature, humidity) << " %, (";
+
+	switch(cf) {
+	case Comfort_OK:
+		Serial.print(_F("OK"));
+		break;
+	case Comfort_TooHot:
+		Serial.print(_F("Too Hot"));
+		break;
+	case Comfort_TooCold:
+		Serial.print(_F("Too Cold"));
+		break;
+	case Comfort_TooDry:
+		Serial.print(_F("Too Dry"));
+		break;
+	case Comfort_TooHumid:
+		Serial.print(_F("Too Humid"));
+		break;
+	case Comfort_HotAndHumid:
+		Serial.print(_F("Hot And Humid"));
+		break;
+	case Comfort_HotAndDry:
+		Serial.print(_F("Hot And Dry"));
+		break;
+	case Comfort_ColdAndHumid:
+		Serial.print(_F("Cold And Humid"));
+		break;
+	case Comfort_ColdAndDry:
+		Serial.print(_F("Cold And Dry"));
+		break;
+	default:
+		Serial.print(_F("Unknown:"));
+		Serial.print(cf);
+		break;
+	}
+
+	Serial.println(')');
+}