Make sensor inputs invertable

include/config.h

 #define LED_CONNECT_BLINK_INTERVAL 250
 #define LED_ERROR_BLINK_INTERVAL 100
 
+#define INVERT_SENSOR_BOTTOM
+//#define INVERT_SENSOR_TOP
+
 #define OWN_I2C_ADDRESS 0x42
 #define I2C_BUS_SPEED 400000
 #define I2C_BUF_SIZE 32

src/Plants.cpp

 #include <Arduino.h>
+
 #include "DebugLog.h"
 #include "Plants.h"
+#include "config.h"
+#include "config_pins.h"
     
 // valves: no of plants + 1 for water inlet
 // pumps: no of fertilizers
     bool low = switches.getPin(0);
     bool high = switches.getPin(1);
     
+#ifdef INVERT_SENSOR_BOTTOM
+    low = !low;
+#endif // INVERT_SENSOR_BOTTOM
+    
+#ifdef INVERT_SENSOR_TOP
+    high = !high;
+#endif // INVERT_SENSOR_TOP
+    
     if ((!low) && (!high)) {
         return empty;
     } else if (low && (!high)) {

src/WifiStuff.cpp

     
     ws += F("\"switches\": [ ");
     for (int i = 0; i < SWITCH_COUNT; i++) {
+        bool v = get_plants()->getSwitches()->getPin(i);
+        
+#ifdef INVERT_SENSOR_BOTTOM
+        if (i == 0) {
+            v = !v;
+        }
+#endif // INVERT_SENSOR_BOTTOM
+        
+#ifdef INVERT_SENSOR_TOP
+        if (i == 1) {
+            v = !v;
+        }
+#endif // INVERT_SENSOR_TOP
+
         ws += "\"";
-        ws += get_plants()->getSwitches()->getPin(i) ? "1" : "0";
+        ws += v ? "1" : "0";
         ws += "\"";
         
         if (i < (SWITCH_COUNT - 1)) {
     message += F("<div class='container'>\n");
     for (int i = 0; i < SWITCH_COUNT; i++) {
         message += F("<div class='switch' style='background-color: ");
-        if (get_plants()->getSwitches()->getPin(i)) {
+        bool v = get_plants()->getSwitches()->getPin(i);
+        
+#ifdef INVERT_SENSOR_BOTTOM
+        if (i == 0) {
+            v = !v;
+        }
+#endif // INVERT_SENSOR_BOTTOM
+        
+#ifdef INVERT_SENSOR_TOP
+        if (i == 1) {
+            v = !v;
+        }
+#endif // INVERT_SENSOR_TOP
+        
+        if (v) {
             message += F("red");
         } else {
             message += F("green");