# 1.6 Arduino IDE for Prototyping

The most recent Arduino IDE can be downloaded from <http://www.arduino.org/downloads>. The version that we are using when writing **Arduino Full Stack** is 1.8.3.

![Arduino IDE 1.8.3](https://2341898987-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LCFDbcteyTR3tQSs-5x%2F-LCFE4dCRQBMq1ajywfh%2F-LCFECGp6qkUCtcFQ0ef%2Farduino-ide-1-8-3.jpg?generation=1526059557766235\&alt=media)

Default Arduino sketch looks like the following:

![Arduino Sketch](https://2341898987-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LCFDbcteyTR3tQSs-5x%2F-LCFE4dCRQBMq1ajywfh%2F-LCFECH6ilSLhwIlTz3G%2Farduinosketch.jpg?generation=1526059557824272\&alt=media)

When Arduino board is connected to the host computer via USB cable, you will be able to see **Arduino/Genuino Uno** is automatically ticked and selected under the menu **Tools->Board**. And the users have to manually select/tick the port, here in my case is: **Tools->Port->/dev/ttyACM0(Arduino/Genuino Uno)**.

Here, **ttyACM0** is a USB communication **device** (CDC) of sub-type "**abstract control model**" (**ACM**). In UNIX, **tty** is any device that acts like a "**teletype**", ie, **terminal**.