diff --git a/prof-of-concept.ino b/prof-of-concept.ino
new file mode 100644
index 0000000..8ccbc78
--- /dev/null
+++ b/prof-of-concept.ino
@@ -0,0 +1,83 @@
+// #include <serial.h>
+// #include <Arduino.h>
+
+#include <SoftwareSerial.h> 
+
+// add the Rx to  D2 und Tx to  D3
+SoftwareSerial mySerial(2, 3);   
+
+// set pin for Aktivation button  D4 
+#define aktivation_pin  4
+// set the led pin to  13  witch  equals the build in led  
+#define led_pin 13 
+uint8_t max_threshold = 100;
+uint8_t aktivation_threshold = 80; 
+uint8_t inner_threshold;
+uint8_t bus_hop_reduction=25;
+uint8_t line_groth = 5;
+
+// Trigger send on interrupt 
+void Activation(){
+  if ((inner_threshold>=aktivation_threshold )&&(inner_threshold+line_groth<max_threshold)){
+     inner_threshold += line_groth;  
+  }
+  else{
+   inner_threshold = aktivation_threshold; 
+  }
+  sendnetsteck(bus_hop_reduction); 
+}
+
+// send  reduced number.  
+void sendnetsteck(int8_t livx){
+  if (aktivation_threshold-livx > 0){
+    mySerial.write(aktivation_threshold-livx);
+    Serial.print("Msg Send:");
+    Serial.println(aktivation_threshold-livx); 
+  }
+
+}
+void setup() {
+// forces the bus to  be not syncrone. 
+  delay(random(0, 20));  
+
+  // init the status led 
+  pinMode(led_pin,OUTPUT);
+
+  // init  sensor pin for that.  
+  pinMode(aktivation_pin,INPUT);
+  attachInterrupt(digitalPinToInterrupt(aktivation_pin), Activation, RISING);
+  
+  // start debugging serial 
+  Serial.begin(9600);
+
+  // start comm bus for this projekt. 
+  mySerial.begin(38400);
+}
+
+
+void loop() {
+
+// slow system down to make it capable to see what happends. 
+
+delay(100);
+
+// time based Reduction of  aktivation_threshold 
+
+  if (aktivation_threshold) aktivation_threshold--; 
+  
+  // show the signals on build in  
+  analogWrite(led_pin,aktivation_threshold);
+  
+     
+  while (mySerial.available()){
+   uint8_t msg = mySerial.read();
+   Serial.print("recived msg:");
+   Serial.println(msg);    
+   if (msg <= max_threshold){
+      if  ( msg  >=  aktivation_threshold ){
+        aktivation_threshold= msg;
+        sendnetsteck(bus_hop_reduction); 
+      }
+   }
+  } 
+}
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