diff --git a/README.md b/README.md
index f5f4b50..808133c 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # SigLed
 
-Arduino knihovn pro signalizační LED
\ No newline at end of file
+Arduino knihovna pro signalizační LED
\ No newline at end of file
diff --git a/src/SigLed.cpp b/src/SigLed.cpp
index 17a4e14..a50fa32 100644
--- a/src/SigLed.cpp
+++ b/src/SigLed.cpp
@@ -8,6 +8,7 @@ SigLED::SigLED(int pin, int ledon, int ledoff)
     _pin = pin;
     _ledon = ledon;
     _ledoff = ledoff;
+    _state = LS_NOTINITIALIZED;
 }
 
 void SigLED::rtLed(void)
@@ -62,7 +63,7 @@ void SigLED::rtLed(void)
     }
 }
 
-void SigLED::begin(void)
+void SigLED::_init(void)
 {
 
     pinMode(_pin, OUTPUT);
@@ -74,6 +75,8 @@ void SigLED::begin(void)
 void SigLED::set(const uint8_t *signal)
 {
 
+    if (LS_NOTINITIALIZED == _state)
+        _init();
     noInterrupts();
     _signal = signal;
     _ptr = _signal;
@@ -82,9 +85,11 @@ void SigLED::set(const uint8_t *signal)
     interrupts();
 }
 
-void SigLED::set(PGM_P signal)
+void SigLED::set_P(PGM_P signal)
 {
 
+    if (LS_NOTINITIALIZED == _state)
+        _init();
     noInterrupts();
     _psignal = signal;
     _pptr = _psignal;
@@ -96,6 +101,8 @@ void SigLED::set(PGM_P signal)
 void SigLED::start(void)
 {
 
+    if (LS_NOTINITIALIZED == _state)
+        _init();
     noInterrupts();
     _ptr = _signal;
     _pptr = _psignal;
diff --git a/src/SigLed.h b/src/SigLed.h
index 453d77a..bb9b134 100644
--- a/src/SigLed.h
+++ b/src/SigLed.h
@@ -19,8 +19,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  *
  */
-#ifndef _sigled_h_
-#define _sigled_h_
+#ifndef _SIGLED_H_
+#define _SIGLED_H_
 
 #include <Ticker.h>
 #include <pgmspace.h>
@@ -46,15 +46,17 @@ protected:
     int _ledon;
     int _ledoff;
     enum {
+        LS_NOTINITIALIZED = 0, // neinicializovany stav
         LS_IDLE, // klid, cekame na zmenu (zavolani set, nebo start)
         LS_RUN, // bezi automat
         LS_WAIT, // cekame v automatu
     } _state; // stav automatu
+    void _init(void);
+
 public:
     SigLED(int pin, int ledon, int ledoff);
-    void begin(void);
     void set(const uint8_t *signal);
-    void set(PGM_P signal);
+    void set_P(PGM_P signal);
     void start(void);
     static void lh(SigLED *ptr);
     void rtLed(void); // vykonna metoda