ADC pin reading (#106)

* ADC pin reading

#95

* arduino and always flag correction

* optimize sram use and remove adc sensor option per default

* integrate a threshold

config_ADC.h

@@ -0,0 +1,37 @@
+/*  
+  OpenMQTTGateway  - 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
+ 
+   This files enables to set your parameter for the ADC value
+  
+    Copyright: (c)Florian ROBERT
+  
+    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/>.
+*/
+
+/*----------------------------USER PARAMETERS-----------------------------*/
+/*-------------DEFINE YOUR MQTT PARAMETERS BELOW----------------*/
+#define ADC   "home/ADCtoMQTT"
+#define TimeBetweenReadingADC 0 // time between 2 ADC readings, can be 0 if you want only the threshold to trigger sending
+#define ThresholdReadingADC 50  //  following the comparison between the previous value and the current one +- the threshold the value will be published or not
+
+/*-------------------PIN DEFINITIONS----------------------*/
+#define ADC_PIN A0 //on nodeMCU this is D3 GPIO0
+
+
+