diff --git a/library.properties b/library.properties
index a36aa66..c64ca94 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=DigitalSignalsArduino
-version=0.0.4
+version=0.0.5
 author=Tolentino Cotesta <cotestatnt@yahoo.com>
 maintainer=Tolentino Cotesta <cotestatnt@yahoo.com>
 sentence=Arduino Digital Signal library
diff --git a/src/DigitalIn.cpp b/src/DigitalIn.cpp
index 62f7165..be56b94 100644
--- a/src/DigitalIn.cpp
+++ b/src/DigitalIn.cpp
@@ -54,13 +54,13 @@ uint8_t DigitalIn::update() {
 
     if (!m_pressEdge && fn_press != nullptr && m_pressedDuration > m_bounceTime) {
       m_pressEdge = true;
-      fn_press();
+      fn_press(this);
     }
   }
   else {
     m_pressEdge = false;
     if (fn_release != nullptr && m_pressedDuration > m_bounceTime) {
-      fn_release();
+      fn_release(this);
     }
 
     if (m_pressedDuration > m_longClickTime) {
@@ -99,4 +99,4 @@ bool DigitalIn::longClick(bool waitRelease) {
     return m_fsmState == LONG_CLICK;
   else
     return m_fsmState == PRESSED;
-}
+}
\ No newline at end of file
diff --git a/src/DigitalIn.h b/src/DigitalIn.h
index 5990676..efcb30c 100644
--- a/src/DigitalIn.h
+++ b/src/DigitalIn.h
@@ -6,7 +6,7 @@
 typedef int IOPinName;
 typedef int IOPinMode;
 
-typedef void(*function_cb)();
+typedef void(*function_cb)(void*);
 
 
 /** A digital input, used for reading the state of a pin
@@ -92,6 +92,11 @@ class DigitalIn {
       update();
       return isActive() && m_pressedDuration > m_bounceTime;
     }
+
+    /** Get assigned GPIO number */
+    int getPin() {
+      return m_pin;
+    }
 };
 
 
diff --git a/src/DigitalOut.h b/src/DigitalOut.h
index f3f6f4f..61c0ddf 100644
--- a/src/DigitalOut.h
+++ b/src/DigitalOut.h
@@ -6,7 +6,7 @@ namespace Output {
 enum class OutType {SR, TOFF, TON, TON_M, BLINK};
 }
 
-typedef void(*function_cb)();
+typedef void(*function_out_cb)();
 
 using Output::OutType;
 
@@ -43,8 +43,8 @@ class DigitalOut
     // Set output state
     void write(bool val);
 
-    function_cb fn_rise = nullptr;
-    function_cb fn_fall = nullptr;
+    function_out_cb fn_rise = nullptr;
+    function_out_cb fn_fall = nullptr;
 
   public:
     DigitalOut(OutType type, uint32_t time = 0);
@@ -80,11 +80,11 @@ class DigitalOut
       write(value);
     }
 
-    inline void onRising(function_cb fn) {
+    inline void onRising(function_out_cb fn) {
       fn_rise = fn;
     }
 
-    inline void onFalling(function_cb fn) {
+    inline void onFalling(function_out_cb fn) {
       fn_fall = fn;
     }