Merge pull request #826 from rohoog/patch-1

Update ifSerial.adoc

Author: alranel

Language/Functions/Communication/Serial/ifSerial.adoc

@@ -36,6 +36,7 @@ None
 === Returns
 Returns true if the specified serial port is available. This will only return false if querying the Leonardo's USB CDC serial connection before it is ready. Data type: `bool`.
 
+
 --
 // OVERVIEW SECTION ENDS
 
@@ -66,5 +67,9 @@ void loop() {
 }
 ----
 
+[float]
+=== Notes and Warnings
+This function adds a delay of 10ms in an attempt to solve "open but not quite" situations. Don't use it in tight loops.
+
 --
 // HOW TO USE SECTION ENDS