Goal: switch on/off a LED through HTTP calls.

First test app to try to trigger Raspberry GPIO pins through API calls.

1. Install PiPiper with sudo privileges
2. Git clone
3. Bundle install
4. Connect LED to GPIO PIN #17

If you want to access your server from another device (ie: from your phone, which is cool!), you have to start the Rails server on port 80 and allow any ip address:

rbenv sudo rails s -p 80 -b 0.0.0.0

Switch on LED:

https://<raspberry_ip>/led/on

Switch off LED:

https://<raspberry_ip>/led/off