BeagleBone

This guide explains how to build applications for BeagleBone based on the Kaa C++ endpoint SDK (further, the C++ SDK).

Configuring BeagleBone board

If this is the first time you use the BeagleBone technology, you have to start with configuring your board. For this purpose, refer to the official BeagleBone getting started guide.

Installing third-party components for C++ SDK

The following third-party components must be installed on the BeagleBone board before building the C++ SDK.

• Mandatory: Boost (1.54 min.v.), Avro (1.7.5 - 1.7.7 v.), and Botan (only v.1.11) libraries. 
• Optional: SQLite library. It should be installed only if you are going to use a persistent log storage for the Kaa data collection feature.

NOTE: The further instructions are expected to be executed in the order given, directly on the BeagleBone board, and with Linux installation and root permissions.

To install these libraries, proceed as follows:

1. Connect to the board via an ssh client. Refer to the official BeagleBone getting started guide for any help required.

2. Install common prerequisites:

   sudo apt-get update
   sudo apt-get upgrade
   sudo apt-get install cmake

3. Install Boost (1.54 or higher).

   sudo apt-get install libbz2-dev libbz2-1.0 zlib1g zlib1g-dev
   wget http://sourceforge.net/projects/boost/files/boost/1.58.0/boost_1_58_0.tar.gz
   tar -zxf boost_1_58_0.tar.gz
   cd boost_1_58_0/
   ./bootstrap.sh
   sudo ./b2 install

4. Install Avro (1.7.5-1.7.7).

   wget http://apache.ip-connect.vn.ua/avro/avro-1.7.7/cpp/avro-cpp-1.7.7.tar.gz
   tar -zxf avro-cpp-1.7.7.tar.gz
   cd avro-cpp-1.7.7/
   cmake -G "Unix Makefiles"
   sudo make install

5. Install Botan (1.11).

   wget https://github.com/randombit/botan/archive/1.11.28.tar.gz
   tar -zxf 1.11.28.tar.gz
   cd botan-1.11.28/
   ./configure.py
   sudo make install
   ln -s /usr/local/include/botan-1.11/botan /usr/local/include/botan

6. Install SQLite (latest).

   wget --no-check-certificate https://www.sqlite.org/2015/sqlite-autoconf-3081002.tar.gz
   tar -zxf sqlite-autoconf-3081002.tar.gz
   cd sqlite-autoconf-3081002/
   ./configure
   sudo make install

Creating applications based on C++ SDK

To create an application based on the C++ SDK, you need  to build static/shared Kaa libraries from the generated SDK at first and then link your application to those libraries. You can either do it manually or create some build script to automate the building process (see the Example section).

The BeagleBone platform allows building the source code directly on the board. The only thing you need to do prior to that is export your code onto the board. For this purpose you can use, for example, the scp utility.

Example

To quickly start with the Kaa IoT platform, you can download one of Kaa demo applications from the Kaa Sandbox and run it on the BeagleBone board.
For this example, you need to download the notification demo from the Kaa Sandbox to your host machine. After that, export the downloaded archive to the board and run the demo, as follows:

1. Find the IP address assigned to the BeagleBone network interface:

   BeagleBone

   ifconfig eth0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'

2. Copy the demo application source package to BeagleBone from your host machine:

   Host machine

   scp /path/to/downloaded/demo/notification_demo.tar.gz [email protected]<put ip address here>:notification_demo.tar.gz

3. Build and run the notification demo from your BeagleBone board:

   BeagleBone

   tar -zxf notification_demo.tar.gz
   cd CppNotificationDemo/
   ./build.sh deploy

If the build is successful, you will see the following output on the BeagleBone terminal:

Notification demo started
--= Press Enter to exit =--
Topic list is empty
Topic list was updated
Topic: id '603', name 'Sample mandatory topic', type 'MANDATORY_SUBSCRIPTION'
Topic: id '604', name 'Sample optional topic', type 'OPTIONAL_SUBSCRIPTION'
Subscribing to optional topic '604'
Notification for topic id '603' received
Notification body: 'This is sample notification for mandatory topic. Client automatically receive notifications for manadatory topics. More details here: https://docs.kaaproject.org/display/KAA/Using+notifications'
Notification for topic id '604' received
Notification body: 'This is sample notification for optional topic. Client should subscribe to optional topics in order to receive notifications. This application subscribes to optional topics automatically.'
Notification demo stopped