add example to correct folder

examples/knx-esp-demo/knx-esp-demo.ino

@@ -1,11 +1,7 @@
 #include <EEPROM.h>
 #include "knx_esp.h"
 
-float currentValue = 0;
-float maxValue = 0;
-float minValue = RAND_MAX;
-long lastsend = 0;
-
+// declare array of all groupobjects with their sizes in byte
 GroupObject groupObjects[]
 {
     GroupObject(2),
@@ -14,13 +10,20 @@ GroupObject groupObjects[]
     GroupObject(1)
 };
 
+// create named references for easy access to group objects
 GroupObject& goCurrent = groupObjects[0];
 GroupObject& goMax = groupObjects[1];
 GroupObject& goMin = groupObjects[2];
 GroupObject& goReset = groupObjects[3];
 
+float currentValue = 0;
+float maxValue = 0;
+float minValue = RAND_MAX;
+long lastsend = 0;
+
 void measureTemp()
 {
+      
     long now = millis();
     if ((now - lastsend) < 2000)
         return;
@@ -30,6 +33,7 @@ void measureTemp()
     currentValue = (r * 1.0) / (RAND_MAX * 1.0);
     currentValue *= 100 * 100;
 
+    // write new value to groupobject
     goCurrent.objectWriteFloat(currentValue);
 
     if (currentValue > maxValue)
@@ -45,6 +49,7 @@ void measureTemp()
     }
 }
 
+// callback from reset-GO
 void resetCallback(GroupObject& go)
 {
     if (go.objectReadBool())
@@ -61,11 +66,15 @@ void setup()
 
     randomSeed(millis());
 
+    // register group objects
     knx.registerGroupObjects(groupObjects, 4);
+    // read adress table, association table, groupobject table and parameters from eeprom
     knx.readMemory();
 
+    // register callback for reset GO
     goReset.updateHandler = resetCallback;
 
+    // print values of parameters if device is already configured
     if (knx.configured())
     {
         Serial.printf("Timeout: %d\n", knx.paramByte(0));
@@ -75,12 +84,16 @@ void setup()
         Serial.printf("Abgleich %d\n", knx.paramByte(4));
     }
 
+    // start the framework. Will get wifi first.
     knx.start();
 }
 
 void loop() 
 {
+    // don't delay here to much. Otherwise you might lose packages or mess up the timing with ETS
     knx.loop();
+
+    // only run the application code if the device was configured with ETS
     if (!knx.configured())
         return;