added pi zero w blogpost (#2542)

source/_posts/2017-05-01-home-assistant-on-raspberry-pi-zero-in-30-minutes.markdown

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+---
+layout: post
+title: "Home Assistant on a Pi Zero W in 30 minutes"
+description: "Installing Home Assistant (Hassbian) on a Pi Zero W"
+date: 2017-05-01 09:00:00 -0500
+date_formatted: "May 1, 2017"
+author: Avraham David Gelbfish
+author_twitter: adgelbfish
+comments: true
+categories: tutorial
+og_image: /images/blog/2017-05-hassbian-pi-zero/home_assistant_plus_rpi_600x315.png
+---
+<p class="img">
+  <img src="/images/blog/2017-05-hassbian-pi-zero/home_assistant_plus_rpi_600x315.png" />
+</p>
+
+Saw the announcement yesterday for Hassbian 1.2.1 and got super excited? 
+
+Today we'll flash the latest Hassbian to a Raspbery Pi Zero W.
+**With an added bonus** that besides for a usb cable for power, there's no need for any cables!
+
+What you'll need:
+- a Raspberry Pi Zero W (an amazing tiny computer with built-in wifi)
+- a microSD card
+- some source of USB power
+- wifi
+- a desktop or laptop
+
+Let's get to it!
+
+First, download the Hassbian 1.21 image from [here](https://github.com/home-assistant/pi-gen/releases/tag/v1.21).
+
+Unzip it.
+
+Flash it to the microSD card. (if you need a flash tool, try [Etcher](https://etcher.io/))
+
+When the flashing finishes, remove it and plug it back in. 
+You should see a drive called "boot". 
+
+Right in there, not in any folders, create a file called wpa_supplicant.conf.
+
+The contents of the config file should be something like this:
+(You may have to adjust for your config, hints [here](https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md) )
+
+```
+network={
+    ssid="YOUR_WIFI_NETWORK_NAME_HERE"
+    psk="YOUR_WIFI_PASSWORD_HERE"
+    key_mgmt=WPA-PSK
+}
+```
+
+
+Next stick your card into the Raspberry Pi Zero W, and plug it in.
+
+After about a minute, use your ssh client to connect to hassbian (or hassbian.local from a mac), with the username pi. The default password is raspberry.
+
+It's a good idea to change the password. To do so, use the `passwd` command.
+
+Next, type the following two commands into the ssh console:
+
+```
+sudo systemctl enable install_homeassistant.service
+sudo systemctl start install_homeassistant.service
+```
+
+Wait about 15 - 20 minutes and Viola! you have your home assistant on your pi in 30 minutes.
+
+To try it out, go to [http://hassbian:8123](http://hassbian:8123) or [http://hassbian.local:8123](http://hassbian.local:8123) if you're using Mac
+