Add documentation to onoffsim

lib/onoffsim/Readme.md

@@ -0,0 +1,21 @@
+<a name="onoffsim"></a>
+
+## onoffsim
+Object representing a fake onoff Gpio class
+
+**Kind**: global constant  
+<a name="onoffsim.Gpio"></a>
+
+### onoffsim.Gpio(no, dir, additional) ⇒ <code>object</code>
+Gpio() - 
+Create's a Gpio class in the case of running on a dev machine
+
+**Kind**: static method of [<code>onoffsim</code>](#onoffsim)  
+**Returns**: <code>object</code> - Fake Gpio object  
+
+| Param | Type | Description |
+| --- | --- | --- |
+| no | <code>integer</code> | Number of the GPIO pin |
+| dir | <code>string</code> | Dirction of the pin, 'input' or 'output' |
+| additional | <code>string</code> | Additional instructions for the GPIO pin, for 'input' type |
+

lib/onoffsim/index.js

@@ -1,6 +1,16 @@
 'use strict'
 
+/** Object representing a fake onoff Gpio class */
 const onoffsim = {
+	/**
+	* Gpio() - 
+	* Returns a Gpio class in the case of running on a dev machine
+	*
+	* @param {integer}	no 			Number of the GPIO pin
+	* @param {string} 	dir 		Dirction of the pin, 'input' or 'output'
+	* @param {string} 	additional 	Additional instructions for the GPIO pin, for 'input' type
+	* @returns {object} Fake Gpio object
+	*/
 	Gpio : function (no, dir = 'in', additional = 'none') {
 		//
 		return {