Updated with reed relais and debouncing button

lib/HomieNodes/ContactNode.cpp

@@ -0,0 +1,111 @@
+/*
+ * ContactNode.cpp
+ * Homie Node for a Contact switch
+ *
+ * Version: 1.0
+ * Author: Lübbe Onken (http://github.com/luebbe)
+ */
+
+#include "ContactNode.hpp"
+
+ContactNode::ContactNode(const char *name,
+                         const int contactPin,
+                         TContactCallback contactCallback)
+    : HomieNode(name, "ContactNode", "sensor")
+{
+  _contactPin = contactPin;
+  _contactCallback = contactCallback;
+}
+
+int ContactNode::getContactPin()
+{
+  return _contactPin;
+}
+
+byte ContactNode::readPin()
+{
+  return digitalRead(_contactPin);
+}
+
+// Debounce input pin.
+bool ContactNode::debouncePin(void)
+{
+  byte inputState = readPin();
+  if (inputState != _lastInputState)
+  {
+    _stateChangedTime = millis();
+    _stateChangeHandled = false;
+    _lastInputState = inputState;
+#ifdef DEBUG
+    Homie.getLogger() << "State Changed to " << inputState << endl;
+#endif
+  }
+  else
+  {
+    unsigned long dt = millis() - _stateChangedTime;
+    if (dt >= DEBOUNCE_TIME && !_stateChangeHandled)
+    {
+#ifdef DEBUG
+      Homie.getLogger() << "State Stable for " << dt << "ms" << endl;
+#endif
+      _stateChangeHandled = true;
+      return true;
+    }
+  }
+  return false;
+}
+
+void ContactNode::handleStateChange(bool open)
+{
+  if (Homie.isConnected())
+  {
+    setProperty("open").send(open ? "true" : "false");
+  }
+  if (_contactCallback)
+  {
+    _contactCallback(open);
+  }
+
+  printCaption();
+  Homie.getLogger() << cIndent << "is " << (open ? "open" : "closed") << endl;
+}
+
+void ContactNode::onChange(TContactCallback contactCallback)
+{
+  _contactCallback = contactCallback;
+}
+
+void ContactNode::printCaption()
+{
+  Homie.getLogger() << cCaption << endl;
+}
+
+void ContactNode::loop()
+{
+  if (_contactPin > DEFAULTPIN)
+  {
+    if (debouncePin() && (_lastSentState != _lastInputState))
+    {
+      handleStateChange(_lastInputState == HIGH);
+      _lastSentState = _lastInputState;
+    }
+  }
+}
+
+void ContactNode::setupPin()
+{
+  pinMode(_contactPin, INPUT_PULLUP);
+}
+
+void ContactNode::setup()
+{
+  advertise("open");
+
+  printCaption();
+  Homie.getLogger() << cIndent << "Pin: " << _contactPin << endl;
+
+  if (_contactPin > DEFAULTPIN)
+  {
+    setupPin();
+  }
+}