Platforms

Artoo has a extensible system for connecting to hardware devices.

Raspberry Pi


Repository Issues

The Raspberry Pi is an inexpensive and popular ARM based single board computer with digital & PWM GPIO, and i2c interfaces built in.

+ info about the Raspberry Pi platform click here

How To Install

If you do not have ruby installed, you'll need to do that first.

Then install the artoo-raspi gem:

sudo gem install artoo-raspi

How To Use

This small program causes an LED to blink.

require 'artoo'

connection :raspi, :adaptor => :raspi
device :led, :driver => :led, :pin => 11

work do
  every 1.second do
    led.toggle
  end
end

To run the examples, requires sudo access on the Raspberry Pi:

sudo ruby examples/raspi_led.rb

Important Note: You need to install pi-blaster in the raspberry-pi, this project enables PWM in the GPIO pins for some of the drivers like LED, Motor and Servo.

How To Connect

Connecting to Raspberry Pi GPIO

This gem only works on a real Raspberry Pi. Do not bother trying on any other kind of computer it will not work. Also note you will need to connect actual circuits to the Raspberry Pi's GPIO pins.

Enabling the Raspberry Pi i2c on raspbian

You must add these two entries in your /etc/modules

i2c-bcm2708
i2c-dev

You must also ensure that these entries are commented in your /etc/modprobe.d/raspi-blacklist.conf

#blacklist spi-bcm2708
#blacklist i2c-bcm2708

Now restart your raspberry pi.

Enabling PWM output on GPIO pins.

You need to install and have pi-blaster running in the raspberry-pi, you can follow the instructions for pi-blaster install on our repo here:

https://github.com/hybridgroup/pi-blaster

Drivers

All Artoo digital and PWM GPIO, and i2c drivers listed below should work with the Raspberry Pi: