diff --git a/src/button.cpp b/src/button.cpp
index b0352ed..9debb85 100644
--- a/src/button.cpp
+++ b/src/button.cpp
@@ -1 +1,7 @@
 #include "button.hpp"
+
+#include <Arduino.h>
+
+bool Button::is_button_pressed(void) {
+    return (analogRead(0) > 950);
+}
\ No newline at end of file
diff --git a/src/button.hpp b/src/button.hpp
index 0c926dc..cfd822f 100644
--- a/src/button.hpp
+++ b/src/button.hpp
@@ -1,11 +1,10 @@
 #ifndef __BUTTON_HPP__
 #define __BUTTON_HPP__
 
-#include "pins.hpp"
-
 class Button {
 public:
-	Button(unsigned analogPin = BTN_ANALOGPIN, int vRef = BTN_VREF) : _aPin{analogPin}, _vRef{vRef} {};
+	Button(unsigned analogPin, int vRef) : _aPin{analogPin}, _vRef{vRef} {};
+	bool is_button_pressed(void);
 private:
 	unsigned _aPin;
 	int _vRef;
diff --git a/src/main.cpp b/src/main.cpp
index 62ee5fe..725c1dc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,52 +1,52 @@
-#include <Arduino.h>
-#include <SoftwareSerial.h>
-
-// #include "display.hpp"
-// #include "rotary_encoder.hpp"
-
-// int seconds = 0;
-//
-// void start_count(int seconds);
-//
-// Display display;
-// RotaryEncoder encoder;
-
-SoftwareSerial swSerial(3, 4);
-
-void setup() {
-	swSerial.begin(9600);
-	// display = Display();
-	// encoder = RotaryEncoder();
-	while(!swSerial.available());
-
-	swSerial.println("nik");
-}
-
-void loop() {
-	if (analogRead(0) > 950) {
-		swSerial.println("niki");
-	} else {
-		swSerial.println("pushed");
-	}
-	delay(1000);
-	// display.print_time(seconds);
-	// seconds = encoder.value_select(display);
-	// start_count(seconds);
-	// while (analogRead(0) > 950) {
-	// 	display.chenillard();
-	// }
-}
-
-// void start_count(int secondsToWait) {
-// 	unsigned long millisToWait = secondsToWait * 1000L;
-// 	unsigned long millisElapsed = 0L;
-// 	unsigned long millisAtStart = millis();
-//
-// 	do {
-// 		millisElapsed = millis() - millisAtStart;
-// 		display.print_time(secondsToWait - millisElapsed / 1000);
-// 		delay(500);
-// 	} while (millisElapsed < millisToWait);
-//
-//
-// }
+#include <Arduino.h>
+#include <SoftwareSerial.h>
+
+// #include "display.hpp"
+// #include "rotary_encoder.hpp"
+
+// int seconds = 0;
+//
+// void start_count(int seconds);
+//
+// Display display;
+// RotaryEncoder encoder;
+
+SoftwareSerial swSerial(3, 4);
+
+void setup() {
+	swSerial.begin(9600);
+	// display = Display();
+	// encoder = RotaryEncoder();
+	while(!swSerial.available());
+
+	swSerial.println("nik");
+}
+
+void loop() {
+	if (analogRead(0) > 950) {
+		swSerial.println("niki");
+	} else {
+		swSerial.println("pushed");
+	}
+	delay(1000);
+	// display.print_time(seconds);
+	// seconds = encoder.value_select(display);
+	// start_count(seconds);
+	// while (analogRead(0) > 950) {
+	// 	display.chenillard();
+	// }
+}
+
+// void start_count(int secondsToWait) {
+// 	unsigned long millisToWait = secondsToWait * 1000L;
+// 	unsigned long millisElapsed = 0L;
+// 	unsigned long millisAtStart = millis();
+//
+// 	do {
+// 		millisElapsed = millis() - millisAtStart;
+// 		display.print_time(secondsToWait - millisElapsed / 1000);
+// 		delay(500);
+// 	} while (millisElapsed < millisToWait);
+//
+//
+// }
diff --git a/src/rotary_encoder.cpp b/src/rotary_encoder.cpp
index d9bceae..2f9745b 100644
--- a/src/rotary_encoder.cpp
+++ b/src/rotary_encoder.cpp
@@ -12,6 +12,7 @@ int RotaryEncoder::value_select(Display &display) {
 			_currentValue = newEncVal;
 
 			if (-4 >= _shift || _shift >= 4) {
+				/* todo make real comp : int size is target dependant */
 				int sign = _shift >> 2;
 
 				if (seconds < 60) {