make a lot of things better

lib/Valve/valve.cpp

@@ -1,7 +1,7 @@
 #include "valve.h"
 
-Valve::Valve() {
-    
+Valve::Valve(uint8_t maxOpen) {
+    this->maxOpen = maxOpen;
 }
 
 void Valve::loop() {
@@ -37,6 +37,10 @@ void Valve::open(uint8_t valveNumber, uint8_t minutes) {
     if (valveNumber >= this->valveCount)
         return;
 
+    if (this->getNumOfOpen() >= this->maxOpen) {
+        return;
+    }
+
     this->valves[valveNumber].duration = minutes;
     this->valves[valveNumber].startTime = millis();
     this->setValve(valveNumber, true);
@@ -60,7 +64,7 @@ void Valve::closeAll() {
         this->close(i);
 }
 
-uint8_t Valve::getNumOfOpen() {
+uint8_t Valve::getNumOfOpen() const {
     uint8_t res = 0;
     for (uint8_t i = 0; i < this->valveCount; i++)
         if (this->valves[i].duration)