diff --git a/doku.txt b/doku.txt
new file mode 100644
index 0000000..cc2fb63
--- /dev/null
+++ b/doku.txt
@@ -0,0 +1,3 @@
+Hardware Timer didnt work https://github.com/khoih-prog/ESP8266TimerInterrupt#why-using-isr-based-hardware-timer-interrupt-is-better
+=> Software Timer https://ullisroboterseite.de/esp8266-timing.html#timer
+
diff --git a/src/main.cpp b/src/main.cpp
index 18af5f1..7642d7a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -21,7 +21,7 @@ void ledsequence(uint8_t direction, uint8_t onoff, uint8_t factor);
 uint8_t softstart_led(uint8_t led, uint16_t startval, uint16_t stopval, uint8_t factor);
 
 void timerCallback(void *pArg)
-{ 
+{
   *((int *) pArg) += 1;
   
   //Serial.print("hallo\n");
@@ -192,10 +192,11 @@ void setup() {
     delay(5000);
     ESP.restart();
   }
- 
+
   os_timer_setfn(&Timer1, timerCallback, &c);
   os_timer_arm(&Timer1, 1, true);
 
+
   Serial.println("Ready");
   Serial.print("IP address: ");
   Serial.println(WiFi.localIP());