HTTP topping for Raspberry Pi
Whipped Cream is a tool which does a couple of things:
- Parses a simple plugin DSL to create web servers for Raspberry Pi I/O (input and output).
- Creates and tests plugins on your computer.
- Deploys plugins to your Rapsberry Pis.
It has a CLI (command line interface) command which parses a plugin:
name "Garage" button "Open/Close", pin: 18
...and can start a web server:
$ whipped-cream start garage.rb
...which can be deployed to your Pi:
$ whipped-cream deploy garage.rb 192.168.1.123 ...
Get a Pi
- Raspberry Pi
- Power adapter
- 4GB+ SD Card
You might also want:
- Solderless breadboard & jumper cables, for prototyping
- GPIO breakout cable (Adafruit), for easily extending the GPIO pins to your breadboard
- Mini USB wifi adapter, for placing the Pi anywhere in your house when you're done
- A case for your Raspberry Pi
Install Ruby on your computer
Whipped Cream runs on Ruby 1.9.3 and above.
We recommend ruby-install for installing Ruby versions, and chruby for switching between them. RVM will also work fine.
You can also install Ruby 2.0 with Homebrew.
Most package managers have recent Ruby versions available. Try
sudo apt-get install ruby1.9.3 or
sudo yum install ruby1.9.3. You can also use
Install the whipped-cream CLI to your computer
That's right, we're still on your computer, not your Raspberry Pi.
gem install whipped-cream
Check to make sure everything works
$ whipped-cream demo [2013-10-11 07:59:19] INFO WEBrick 1.3.1 [2013-10-11 07:59:19] INFO ruby 1.9.3 (2013-06-27) [x86_64-darwin12.4.0] [2013-10-11 07:59:19] INFO WEBrick::HTTPServer#start: pid=5351 port=35511
You should now be able to point your browser to http://127.0.0.1:35511 and see the demo running.
Whipped Cream creates a web page which maps HTML controls to GPIO pins.
You'll want to use the pin numbering from the BCM chip (not the actual pin number, and not the WiringPi numbers).
|Raspberry Pi Rev1||Raspberry Pi Rev2|
|Images from HobbyTronics|
Gets shown at the top of the page.
Toggle a pin on or off.
switch "Light", pin: 24
Momentarily turn a pin on for 0.25 seconds.
button "Open/Close", pin: 18
Display something on the web page based on a pin's value.
sensor "Door", high: "Closed", low: "Open", pin: 23
Sensors can also be created with a block to show non-pin data.
sensor "Pi Uptime" do system 'uptime' end
- Run the tests with
- Deploy to a Vagrant box with
Web UI designed by Ashton Harris.
Logo designed by Jeff Bloch.