DevelopmentModuleAPI.md

@@ -28,3 +28,12 @@ Clarify if
 ```
 
 are valid names, because in original FHEM code, they are which is probably a bug.
+
+### makeReadingName
+
+```perl
+$validName = makeReadingName($name);
+```
+This function removes from given Readingname `$name` all invalid characters and replaces them with the underscore `_`. The return value `$validName` is a Readingname that has only valid characters in it (see `goodReadingName`).
+If `$name` was already valid, `$validName` equals `$name`.
+