MTP17Fall-GroupB

Codebase for the MTP subject in Fall 2017. The goal is to successfully transmit and receive a 1MB file with two battery-powered independent transceivers.

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.

Prerequisites

We need git and cmake:

$ sudo apt install git cmake 

And then, we need to enable the SPI kernel module for the raspberry:

$ sudo raspi-config

Under Advanced > Enable SPI Kernel Module.

Installing

The main requisite is the RF24 library. We'll start by installing the BCM2835 library (GPIO):

$ wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.52.tar.gz
$ tar xf bcm2835-1.52.tar.gz
$ cd bcm2835-1.52
$ ./configure
$ make
$ sudo make check
$ sudo make install

Then, we need the MRAA library:

$ cd ~/
$ git clone https://github.com/intel-iot-devkit/mraa.git
$ cd mraa
$ mkdir build
$ cd build
$ cmake .. -DBUILDSWIGNODE=OFF
$ sudo make install

To finish the MRAA installation, we have to edit the following file:

$ nano /etc/ld.so.conf 

and add this at the end:

/usr/local/lib/arm-linux-gnueabihf 

We apply the changes with

$ sudo ldconfig

Finally, we have to install RF24:

$ cd ~/
$ git clone https://github.com/nRF24/RF24.git
$ cd RF24/
$ ./configure --driver=MRAA
$ sudo make install -B

And we're done!

Compiling code

To compile including this library, with your file.cpp in the same folder as the RF24 folder:

$ g++ -Wall -L RF24/ -lrf24 file.cpp -o output

Remember that all RF24 code needs to be run as root:

sudo ./output

Raspbian image

You can also find a Raspbian image with everything already prepared in the #software channel in Slack.

To call the main:

./main tx file.txt
./main rx