JarCasting 
Eclipse Mraa - Low Level I/O Communications Library for GNU/Linux platforms
Eclipse Mraa (Libmraa) is a C/C++ library with bindings to Java, Python and JavaScript to interface with the I/O pins and buses on various IoT and Edge platforms, with a structured and sane API where port names/numbering match the board that you are on. Use of libmraa does not tie you to specific hardware. Since 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 an Eclipse IoT project. A detailed project description can be found 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
- ADLINK IPi-SMARC X86
- UP Xtreme
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 or SLE
For the latest versions of openSUSE and SLE the project is distributed via native repositories and can be installed by developers with:
sudo zypper install mraa mraa-devel
For ARM boards use:
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
A full list of packages and instructions for installing MRAA for various openSUSE releases can be found here.
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 Red Hat Enterprise Linux, CentOS and Other Linux Distributions
The MRAA project does not currently distribute official binaries for RHEL or CentOS so developers will have to compile the project from sources as described in the next section.
For testing and development purposes it may be possible to share and install .deb and .rpm packages across similar Linux builds.
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 an issue on Github or send an email to our mailing list. You must be subscribed to the list before you can post. You might also catch us on the mraa channel on freenode IRC.
See the Contribution documentation for more details.
Changelog
Version changelog here.
