make a lot of things better

lib/Valve/valve.h

@@ -13,7 +13,7 @@ class Valve {
             uint32_t startTime;
         };
         
-        Valve();
+        Valve(uint8_t maxOpen);
 
         void loop();
 
@@ -24,7 +24,8 @@ class Valve {
         void close(uint8_t valveNumber);
         void closeAll();
 
-        uint8_t getNumOfOpen();
+        uint8_t getNumOfOpen() const;
+        uint8_t getMaxOpen() const { return this->maxOpen; }
         uint16_t getTimeLeft(uint8_t valveNumber);
 
     private:
@@ -33,6 +34,7 @@ class Valve {
         ShiftRegister* shiftRegister = nullptr;
 
         ValveData valves[MAX_VALVES];
+        uint8_t maxOpen;
         uint8_t valveCount = 0;
         uint16_t loopDelay = 1000;
         uint32_t loopLastMillis = 0;