Merge pull request #16 from anmenaga/SSD1306ExampleDoc

OLED SSD1306 example doc

Author: Andrew

Examples/Microsoft.PowerShell.IoT.SSD1306/README.md

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+# Example module Microsoft.PowerShell.IoT.SSD1306
+
+This PowerShell module is for working with [small I2C OLED displays](https://www.ebay.com/itm/2X-0-96-I2C-IIC-Serial-128X64-LED-OLED-LCD-Display-Module-for-Arduino-White/191785893008?epid=2001476960&hash=item2ca7547c90:g:WbwAAOSwAPVZLOx~) based on [SSD1306 driver chip](https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf).
+
+## Hardware setup
+
+There are many versions of small OLED displays; in this example we'll use a 128x64 version based on I2C interface.
+
+Wiring diagram with Raspberry Pi 3 is like this:
+
+![ssd1306_schema](https://user-images.githubusercontent.com/11860095/38397481-a8d7eea8-38f2-11e8-8986-eae21e6f384e.png)
+
+## Software setup
+
+### Install PowerShell Core on Raspberry Pi
+
+Installation instructions can be found [here](https://github.com/PowerShell/PowerShell/tree/master/docs/installation/linux.md#raspbian).
+
+### Enable I2C interface on Raspberry Pi
+
+1. `sudo raspi-config`
+2. `5 Interfacing options`
+3. `P5 I2C`
+4. `Would you like ARM I2C interface to be enabled -> Yes`
+
+### Start Powershell and install modules
+
+```powershell
+sudo pwsh
+Install-Module -Name Microsoft.PowerShell.IoT
+git clone https://github.com/PowerShell/PowerShell-IoT.git
+Import-Module ./PowerShell-IoT/Examples/Microsoft.PowerShell.IoT.SSD1306
+```
+
+### Run example
+```powershell
+PS /home/pi> New-OledDisplay | Set-OledText -Value "Hello from PowerShell"
+```