add example to correct folder

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

@@ -1,57 +1,62 @@
-#include <EEPROM.h>
+#include <EEPROM.h>
 #include "knx_esp.h"
 
-float currentValue = 0;
-float maxValue = 0;
-float minValue = RAND_MAX;
-long lastsend = 0;
-
-GroupObject groupObjects[]
-{
-    GroupObject(2),
-    GroupObject(2),
-    GroupObject(2),
-    GroupObject(1)
-};
-
-GroupObject& goCurrent = groupObjects[0];
-GroupObject& goMax = groupObjects[1];
-GroupObject& goMin = groupObjects[2];
-GroupObject& goReset = groupObjects[3];
-
-void measureTemp()
-{
-    long now = millis();
-    if ((now - lastsend) < 2000)
-        return;
-
-    lastsend = now;
-    int r = rand();
-    currentValue = (r * 1.0) / (RAND_MAX * 1.0);
-    currentValue *= 100 * 100;
-
-    goCurrent.objectWriteFloat(currentValue);
-
-    if (currentValue > maxValue)
-    {
-        maxValue = currentValue;
-        goMax.objectWriteFloat(maxValue);
-    }
-
-    if (currentValue < minValue)
-    {
-        minValue = currentValue;
-        goMin.objectWriteFloat(minValue);
-    }
-}
+// declare array of all groupobjects with their sizes in byte
+GroupObject groupObjects[]
+{
+    GroupObject(2),
+    GroupObject(2),
+    GroupObject(2),
+    GroupObject(1)
+};
 
-void resetCallback(GroupObject& go)
-{
-    if (go.objectReadBool())
-    {
-        maxValue = 0;
-        minValue = 10000;
-    }
+// 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;
+
+    lastsend = now;
+    int r = rand();
+    currentValue = (r * 1.0) / (RAND_MAX * 1.0);
+    currentValue *= 100 * 100;
+
+    // write new value to groupobject
+    goCurrent.objectWriteFloat(currentValue);
+
+    if (currentValue > maxValue)
+    {
+        maxValue = currentValue;
+        goMax.objectWriteFloat(maxValue);
+    }
+
+    if (currentValue < minValue)
+    {
+        minValue = currentValue;
+        goMin.objectWriteFloat(minValue);
+    }
+}
+
+// callback from reset-GO
+void resetCallback(GroupObject& go)
+{
+    if (go.objectReadBool())
+    {
+        maxValue = 0;
+        minValue = 10000;
+    }
 }
 
 void setup()
@@ -59,30 +64,38 @@ void setup()
     Serial.begin(115200);
     Serial.setDebugOutput(true);
 
-    randomSeed(millis());
-
-    knx.registerGroupObjects(groupObjects, 4);
-    knx.readMemory();
-
-    goReset.updateHandler = resetCallback;
-
-    if (knx.configured())
-    {
-        Serial.printf("Timeout: %d\n", knx.paramByte(0));
-        Serial.printf("Zykl. senden: %d\n", knx.paramByte(1));
-        Serial.printf("Min/Max senden: %d\n", knx.paramByte(2));
-        Serial.printf("Aenderung senden: %d\n", knx.paramByte(3));
-        Serial.printf("Abgleich %d\n", knx.paramByte(4));
+    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));
+        Serial.printf("Zykl. senden: %d\n", knx.paramByte(1));
+        Serial.printf("Min/Max senden: %d\n", knx.paramByte(2));
+        Serial.printf("Aenderung senden: %d\n", knx.paramByte(3));
+        Serial.printf("Abgleich %d\n", knx.paramByte(4));
     }
-    
+
+    // start the framework. Will get wifi first.
     knx.start();
 }
 
 void loop() 
 {
-    knx.loop();
-    if (!knx.configured())
-        return;
-
+    // 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;
+
     measureTemp();
 }