Updated with reed relais and debouncing button

lib/HomieNodes/ButtonNode.hpp

@@ -0,0 +1,52 @@
+/*
+ * ButtonNode.hpp
+ * Homie Node for a button with optional callback function
+ *
+ * Version: 1.0
+ * Author: Lübbe Onken (http://github.com/luebbe)
+ */
+
+#pragma once
+
+#include <Homie.hpp>
+
+#define DEFAULTPIN -1
+
+class ButtonNode : public HomieNode
+{
+public:
+  typedef std::function<void(void)> TButtonPressCallback;
+  typedef std::function<void(bool)> TButtonChangeCallback;
+
+
+private:
+  const char *cCaption = "• Button:";
+  const char *cIndent = "  ◦ ";
+
+  TButtonPressCallback _buttonPressCallback;
+  TButtonChangeCallback _buttonChangeCallback;
+  int _buttonPin;
+  byte _lastReading = HIGH;
+  byte _buttonState = HIGH;
+  bool _buttonPressHandled = 0;
+  bool _buttonChangeHandled = 0;
+  unsigned long _buttonDownTime = 0;
+  unsigned long _minButtonDownTime = 90;
+  unsigned long _maxButtonDownTime = 2000;
+  unsigned long _lastDebounceTime = 0;  // the last time the button pin was toggled
+
+  void handleButtonPress(unsigned long dt);
+  void handleButtonChange(bool down);  
+  void printCaption();
+
+protected:
+  virtual void loop() override;
+  virtual void setup() override;
+
+public:
+  explicit ButtonNode(const char *name, const int buttonPin = DEFAULTPIN, TButtonPressCallback buttonPressedCallback = NULL,  TButtonChangeCallback buttonChangedCallback = NULL);
+  void onPress(TButtonPressCallback buttonCallback);
+  void onChange(TButtonChangeCallback buttonCallback);
+  void setMinButtonDownTime(unsigned short downTime);
+  void setMaxButtonDownTime(unsigned short downTime);
+};