Add Note and Warning

Keyboard.adoc and Mouse.adoc

Author: sh-aks

Language/Functions/USB (Leonardo and DUE only)/Keyboard.adoc

@@ -24,6 +24,17 @@ The library supports the use of modifier keys. Modifier keys change the behavior
 --
 // OVERVIEW SECTION ENDS
 
+[float]
+=== Notes and Warnings
+These core libraries allow a 32u4 based boards or Due and Zero board to appear as a native Mouse and/or Keyboard to a connected computer.
+[%hardbreaks]
+*A word of caution on using the Mouse and Keyboard libraries*: if the Mouse or Keyboard library is constantly running, it will be difficult to program your board. Functions such as `Mouse.move()` and `Keyboard.print()` will move your cursor or send keystrokes to a connected computer and should only be called when you are ready to handle them. It is recommended to use a control system to turn this functionality on, like a physical switch or only responding to specific input you can control.
+[%hardbreaks]
+When using the Mouse or Keyboard library, it may be best to test your output first using `Serial.print()`. This way, you can be sure you know what values are being reported. Refer to the Mouse and Keyboard examples for some ways to handle this.
+[%hardbreaks]
+// FUNCTIONS SECTION STARTS
+[#functions]
+--
 
 // FUNCTIONS SECTION STARTS
 [#functions]

Language/Functions/USB (Leonardo and DUE only)/Mouse.adoc

@@ -17,10 +17,19 @@ title: serial
 [float]
 === Description
 The mouse functions enable a Leonardo, Micro, or Due to control cursor movement on a connected computer. When updating the cursor position, it is always relative to the cursor's previous location.
+[%hardbreaks]
 --
 // OVERVIEW SECTION ENDS
 
 
+[float]
+=== Notes and Warnings
+These core libraries allow a 32u4 based boards or Due and Zero board to appear as a native Mouse and/or Keyboard to a connected computer.
+[%hardbreaks]
+*A word of caution on using the Mouse and Keyboard libraries*: if the Mouse or Keyboard library is constantly running, it will be difficult to program your board. Functions such as `Mouse.move()` and `Keyboard.print()` will move your cursor or send keystrokes to a connected computer and should only be called when you are ready to handle them. It is recommended to use a control system to turn this functionality on, like a physical switch or only responding to specific input you can control.
+[%hardbreaks]
+When using the Mouse or Keyboard library, it may be best to test your output first using `Serial.print()`. This way, you can be sure you know what values are being reported. Refer to the Mouse and Keyboard examples for some ways to handle this.
+[%hardbreaks]
 // FUNCTIONS SECTION STARTS
 [#functions]
 --