Merge pull request #251 from OpenKNX/fix_data_property_read_idx0

fixed wrong answers to property read
thelsing · Jul 13, 2023 · f7ac39c · f7ac39c
2 parents aa57fdf + a5ba7bc
commit f7ac39c
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/src/knx/data_property.cpp b/src/knx/data_property.cpp
@@ -5,15 +5,16 @@
 
 uint8_t DataProperty::read(uint16_t start, uint8_t count, uint8_t* data) const
 {
-    if (count == 0 || _currentElements == 0 || start > _currentElements || count > _currentElements - start + 1)
-        return 0;
-
     if (start == 0)
     {
         pushWord(_currentElements, data);
         return 1;
     }
 
+    if (count == 0 || _currentElements == 0 || start > _currentElements || count > _currentElements - start + 1)
+        return 0;
+
+
     // we start counting with zero
     start -= 1;