Some debugging changes and other optimizations

lib/AmsDataStorage/src/AmsDataStorage.cpp

@@ -437,8 +437,6 @@ bool AmsDataStorage::load() {
         ret = ret && setMonthData(*month);
     }
 
-    LittleFS.end();
-
     return ret;
 }
 
@@ -451,22 +449,22 @@ bool AmsDataStorage::save() {
     }
     {
         File file = LittleFS.open(FILE_DAYPLOT, "w");
-        char* data = (char*) &day;
-        for(unsigned long i = 0; i < sizeof(data); i++) {
-            file.write(data[i]);
+        char buf[sizeof(day)];
+        memcpy(buf, &day, sizeof(day));
+        for(unsigned long i = 0; i < sizeof(day); i++) {
+            file.write(buf[i]);
         }
         file.close();
     }
     {
         File file = LittleFS.open(FILE_MONTHPLOT, "w");
-        char* data = (char*) &month;
-        for(unsigned long i = 0; i < sizeof(data); i++) {
-            file.write(data[i]);
+        char buf[sizeof(month)];
+        memcpy(buf, &month, sizeof(month));
+        for(unsigned long i = 0; i < sizeof(month); i++) {
+            file.write(buf[i]);
         }
         file.close();
     }
-
-    LittleFS.end();
     return true;
 }