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+---
+layout: page
+title: "Arduino"
+description: "Instructions how to setup an Arduino boards within Home Assistant."
+date: 2015-06-27 10:28
+sidebar: false
+comments: false
+sharing: true
+footer: true
+---
+
+<img src='/images/supported_brands/arduino.png' class='brand pull-right' />
+
+The [Arduino](https://www.arduino.cc/) device family are microcontroller boards that are often based on the ATmega328 chip. They come with digital input/output pins (some can be used as PWM outputs), analog inputs, and a USB connection. The equipment depends on the [type](https://www.arduino.cc/en/Main/Products) of board. The most common ones are the Arduino Uno and the Arduino Leonardo with 14 digital input/output pins and 6 analog input pins.
+
+There are a lot of extensions (so called [shields](https://www.arduino.cc/en/Main/ArduinoShields)) available. Those shields can be plugged-in into the existing connectors and stacked on top of each other. This makes it possible to expand the capabilities of the Arduino boards. 
+
+## Basic Configuration
+
+The arduino component is designed to let you use a directly attached board to your Home Assistant host over USB.
+
+To integrate an Arduino boards with Home Assistant, add the following section to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+arduino:
+  port: /dev/ttyACM0
+```
+The port where is your board connected to your Home Assistant host. If you are using an original Arduino the port will be named `ttyACM*`. The exact
+number can be determined with `ls /dev/ttyACM*`.
+
+```bash
+ls /dev/ttyACM*
+```
+
+If that is not working, check your `dmesg` or `journalctl -f` output. Keep in mind that Arduino clones are often using a different name for the port (e.g. `/dev/ttyUSB*`).
+
+<p class='note warning'>
+A word of caution: The Arduino boards are not storing states. This means that with every initialization the pins are set to off/low.
+</p>
+
+## Switch Configuration
+
+Support for switching pins is limited to high/on and low/off of the digital pins. PWM (pin 3,5,6,9,10, and 11 on a Arduino Uno) is not supported yet.
+
+To enable the Arduino switch pins with Home Assistant, add the following section to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+switch:
+  platform: arduino
+  pins:
+    11:
+      name: Fan Office
+      type: digital
+    12:
+      name: Light Desk
+      type: digital
+```
+
+The digital pins are numbered from 0 to 13. The available pins are 2 till 13. For testing purposes you can use pin 13 because with that pin you can control the internal LED.
+
+The name field of the pins array will be used in the frontend.
+
+## Sensor Configuration
+
+The sensor platform allow you to get an numerical values from an analog input pin. Usually between 0 and 1024. 
+
+To enable an Arduino sensor with Home Assistant, add the following section to your `configuration.yaml` file:
+
+```yaml
+# Example configuration.yaml entry
+sensor:
+  platform: arduino
+  pins:
+    1:
+      name: Door switch
+      type: analog
+    0:
+      name: Brightness
+      type: analog
+```
+
+The 6 analog pins are numbered from A0 to A5.
+
+The name field of the pins array will be used in the frontend.
+