diff --git a/libcrypt/main.c b/libcrypt/main.c
index 793f009..e8f10d2 100644
--- a/libcrypt/main.c
+++ b/libcrypt/main.c
@@ -19,6 +19,7 @@
 uint8_t reportBuffer[2];     /* buffer for HID reports */
 
 static uint8_t next_key=0, prev_key=0xFF;
+static uint8_t sec[SECLEN]=SECRET;
 
 uint32_t get_cnt(){
 	void* p=(void*)eeprom_read_word(CNTPOS_PTR);
@@ -65,14 +66,50 @@ void buildReport(uint8_t mod, uint8_t key){
     reportBuffer[1] = key;
 }
 
+void main_fsm(){
+    static uint8_t device_state=0;
+    static uint8_t prev_btn=0;
+    switch(device_state){
+        case DEV_STATE_RESET:
+        {
+            uint32_t cnt;
+            if( eeprom_read_word(CNTPOS_PTR)==ERROR ){  
+                writeToBuffer(USB_KEY_E);  
+                writeToBuffer(USB_KEY_R);  
+                writeToBuffer(USB_KEY_R);  
+                writeToBuffer(USB_KEY_O);  
+                writeToBuffer(USB_KEY_R);
+            }else{
+                cnt = get_cnt();
+                buffer_unum(get_otp_from_cnt(cnt,8,sec,SECLEN));
+            }
+            device_state=DEV_STATE_SENT;
+            break;
+        }
+        case DEV_STATE_SENT:
+            if( prev_btn!=0 && ((PIN_BTN)&(1<<PBTN))==0 ){
+                writeToBuffer(USB_KEY_ENTER);
+                inc_cnt();
+                device_state=DEV_STATE_CONFIRMED;
+                _delay_ms(100);
+            }
+            break;
+        case DEV_STATE_CONFIRMED:
+        default:
+            if( prev_btn!=0 && ((PIN_BTN)&(1<<PBTN))==0 ){
+                device_state=DEV_STATE_RESET;
+                _delay_ms(100);
+            }
+            break;
+    }
+    prev_btn=(PIN_BTN)&(1<<PBTN);
+}
+
 
 int main(void){
     #ifdef CALIB
     uint8_t   calibrationValue;
     #endif
-
-    uint8_t sec[SECLEN]=SECRET;
-    uint32_t cnt;
     
     #ifdef CALIB
     /* oszillator calibration */
@@ -92,23 +129,21 @@ int main(void){
 
     writeToBuffer(USB_KEY_NOP);
 
-    if( eeprom_read_word(CNTPOS_PTR)==ERROR ){  
-        writeToBuffer(USB_KEY_E);  
-        writeToBuffer(USB_KEY_R);  
-        writeToBuffer(USB_KEY_R);  
-        writeToBuffer(USB_KEY_O);  
-        writeToBuffer(USB_KEY_R);
-    }else{
-        cnt = get_cnt();
-        buffer_unum(get_otp_from_cnt(792,8,sec,SECLEN));
-        //inc_cnt();
-    }
+    /*Set button to input*/
+    DDR_BTN &= ~(1<<PBTN);
+    /*internal pull-up on*/
+    PORT_BTN |= 1<<PBTN;
 
     usbInit();
     sei();
     for(;;){
         wdt_reset();
         usbPoll();
+
+        /* Main FSM*/
+        main_fsm();
+
+        /* Send Keystrokes, if asked to */
         if(usbInterruptIsReady()){
             if(!buff_empty || next_key!=0){
                 if(next_key==0){
diff --git a/libcrypt/main.h b/libcrypt/main.h
index 0e4a5d7..fca1a1d 100644
--- a/libcrypt/main.h
+++ b/libcrypt/main.h
@@ -8,13 +8,11 @@
 #include <util/delay.h>
 #include <avr/io.h>
 
-#define _PORT_BTN		B
-#define _NUM_BTN		3
 
-#define PORT_BTN	PORT_PORT_BTN
-#define DDR_BTN		DDR_PORT_BTN
-#define P_BTN		P_PORT_BTN_NUM_BTN
-#define BTN_VECT	INT_NUM_BTN_vect
+#define PORT_BTN PORTB
+#define PIN_BTN PINB
+#define DDR_BTN DDRB
+#define PBTN PB3
 
 #define CNTPOS_PTR ((void*)1)
 #define ERROR 32202
@@ -23,3 +21,7 @@
 #define UINT32_MAX  4294967296
 #endif
 
+#define DEV_STATE_RESET 0
+#define DEV_STATE_SENT  1
+#define DEV_STATE_CONFIRMED 2
+