GPIOInput Third Time is a Charm! (#258)

* Added 2 files via upload

* Update OpenMQTTGateway.ino

* Update Test_config.h

ZsensorGPIOInput.ino

@@ -0,0 +1,79 @@
+/*  
+  OpenMQTTGateway Addon  - ESP8266 or Arduino program for home automation 
+   Act as a wifi or ethernet gateway between your 433mhz/infrared IR signal  and a MQTT broker 
+   Send and receiving command by MQTT
+ 
+    GPIO Input derived from HC SR-501 reading Addon and https://www.arduino.cc/en/Tutorial/Debounce
+
+    This reads a high (open) or low (closed) through a circuit (switch, float sensor, etc.) connected to ground.
+
+    Copyright: (c)Florian ROBERT
+    
+    Contributors:
+    - 1technophile
+    - QuagmireMan
+  
+    This file is part of OpenMQTTGateway.
+    
+    OpenMQTTGateway is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+    OpenMQTTGateway is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifdef ZsensorGPIOInput
+
+unsigned long lastDebounceTime = 0;
+int InputState = 3;             // Set to 3 so that it reads on startup
+int lastInputState = 3; 
+
+
+void setupGPIOInput() {
+  pinMode(GPIOInput_PIN, INPUT_PULLUP);     // declare GPIOInput pin as input_pullup to prevent floating. Pin will be high when not connected to ground
+}
+
+void MeasureGPIOInput(){
+  int reading = digitalRead(GPIOInput_PIN);
+
+  // check to see if you just pressed the button
+  // (i.e. the input went from LOW to HIGH), and you've waited long enough
+  // since the last press to ignore any noise:
+
+  // If the switch changed, due to noise or pressing:
+  if (reading != lastInputState) {
+    // reset the debouncing timer
+    lastDebounceTime = millis();
+    
+  }
+
+  if ((millis() - lastDebounceTime) > GPIOInputDebounceDelay) {
+    // whatever the reading is at, it's been there for longer than the debounce
+    // delay, so take it as the actual current state:
+  #if defined(ESP8266) || defined(ESP32) 
+    yield();
+  #endif
+    // if the Input state has changed:
+    if (reading != InputState) {
+      InputState = reading;
+            
+      if (InputState == HIGH) {
+        trc(F("GPIO HIGH"));
+        client.publish(subjectGPIOInputtoMQTT,"HIGH");
+      }
+      if (InputState == LOW) {
+        trc(F("GPIO LOW"));
+        client.publish(subjectGPIOInputtoMQTT,"LOW");
+      }
+    }
+  }
+
+  // save the reading. Next time through the loop, it'll be the lastInputState:
+  lastInputState = reading;
+ 
+}
+#endif