libmraa - Low Level Skeleton Library for Communication on GNU/Linux platforms
Libmraa is a C/C++ library with bindings to Java, Python and JavaScript to
interface with the IO on Galileo, Edison & other platforms, with a structured
and sane API where port names/numbering matches the board that you are on. Use
of libmraa does not tie you to specific hardware with board detection done at
runtime you can create portable code that will work across the supported
platforms.
The intent is to make it easier for developers and sensor manufacturers to map
their sensors & actuators on top of supported hardware and to allow control of
low level communication protocol by high level languages & constructs.
The MRAA project is joining the Eclipse Foundation as an Eclipse IoT project.
You can read more about this here.
Supported Boards
X86
- Galileo Gen 1 - Rev D
- Galileo Gen 2 - Rev H
- Edison
- Intel DE3815
- Minnowboard
- NUC 5th generation
- UP
- UP Squared
- Intel Joule
- IEI Tank
ARM
MIPS
FPGA
USB
I2C
Mock
JSON platform
Installing on your board
Installing on Ubuntu
Here is a PPA for installing on Ubuntu Xenial or Bionic:
https://launchpad.net/~mraa/+archive/ubuntu/mraa
sudo add-apt-repository ppa:mraa/mraa
sudo apt-get update
sudo apt-get install libmraa2 libmraa-dev libmraa-java python-mraa python3-mraa node-mraa mraa-tools
Running MRAA tools or applications on Ubuntu systems requires elevated permissions
(e.g. run with sudo).
Install on Arch Linux
There is an AUR package for mraa here: https://aur.archlinux.org/packages/mraa
Install on openSUSE
REPO="openSUSE_Tumbleweed"
if test "$(arch)" == "aarch64"; then
REPO="openSUSE_Factory_ARM"
fi
sudo zypper ar http://download.opensuse.org/repositories/hardware/$REPO/hardware.repo
sudo zypper in mraa
Install on Fedora Linux
There is an mraa package in the main Fedora repository so it can be dnf installed
in all recent Fedora releases. The Node.js and Python 3 bindings are packaged as
separate packages.
sudo dnf install mraa nodejs-mraa python3-mraa
Installing for Node.js only
Note: Node.js 7.0.0+ is not currently supported unless compiling with a patched
vesion of SWIG. See the corresponding section and document below.
You can also install just the node.js mraa module by using npm. You will need a
C++ compiler and the node development headers, however it's not required to
have SWIG installed. This works for node versions 6.x.x and prior.
npm install mraa
Note that installing mraa in this way builds mraa without json-c so you cannot
use mraa_init_json_platform(). Also building this way means the mraa.node
includes a static version of libmraa rather than relying on a dynamic library
in /usr/lib.
Subplatforms (i.e. Firmata) have to be added manually with this kind of install
from your application, as shown in this example.
Compiling
See documentation on building
Examples
See the examples available for various languages
Debugging
Sometimes it just doesn't want to work, let us try and help you, you can file
issues in github or join us in #mraa on freenode IRC, hang around for a little
while because we're not necessarily on 24/7, but we'll get back to you! Have a
glance at our debugging page too.
API Documentation
Contact Us
To ask questions either file issues in github or send emails on our mailing
list. You might also catch us on
the mraa channel on freenode IRC.
See the Contribution documentation for more details.
Changelog
Version changelog here.