From d9c22f14abc229d2f339a340007c198cd424da00 Mon Sep 17 00:00:00 2001
From: Philipp <interfisch@gmx.net>
Date: Sat, 10 Jun 2017 17:41:23 +0200
Subject: [PATCH] Add DHT Sensor

---
 esp-volumeknob/esp-volumeknob.ino | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/esp-volumeknob/esp-volumeknob.ino b/esp-volumeknob/esp-volumeknob.ino
index 0263943..cb72a5a 100644
--- a/esp-volumeknob/esp-volumeknob.ino
+++ b/esp-volumeknob/esp-volumeknob.ino
@@ -5,6 +5,13 @@
 #include <ArduinoOTA.h>
 #include <Encoder.h> //Library download: https://github.com/PaulStoffregen/Encoder
 
+#include "DHT.h"
+DHT dht(D1,DHT22);
+float temperature=0;
+float humidity=0;
+double lastSensorMillis=0;
+#define SENSORPERIOD 5000
+
 //D4 auf ground macht led leuchten
 
 #define PIN_ENCA D6
@@ -45,7 +52,24 @@ void loopHandler() {
     lastPositionCheck=millis();
   }
 
-  
+  if ((lastSensorMillis+SENSORPERIOD)<millis()){
+    float _currentTemperature=dht.readTemperature();
+    if (temperature!=_currentTemperature && (!isnan(_currentTemperature) ==1) && _currentTemperature>-40){
+      
+      temperature=_currentTemperature;
+      Homie.getLogger() << "temperature= " << temperature << endl;
+      char tempstring[16];
+      dtostrf(temperature,1,1,tempstring);
+      knobNode.setProperty("temperature").send(tempstring);
+    }
+    float _currentHumidity=dht.readHumidity();
+    if (humidity!=_currentHumidity && (!isnan(_currentHumidity) ==1)  && _currentHumidity>0){
+      humidity=_currentHumidity;
+      Homie.getLogger() << "humidity= " << humidity << endl;
+      knobNode.setProperty("humidity").send(String(humidity));
+    }
+    lastSensorMillis=millis();
+  }
   
 
   ArduinoOTA.handle();
@@ -70,6 +94,8 @@ void setup() {
 
   knobNode.advertise("encoder");
   knobNode.advertise("btnknob");
+  knobNode.advertise("temperature");
+  knobNode.advertise("humidity");
  
   Homie.setup();
   ArduinoOTA.setHostname(Homie.getConfiguration().deviceId);