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💻 Installing libraries

Read before continuing​

The process of installing the dependencies was automated by creating a shell script for installing the necessary dependencies. The script has only one argument: weather or not you want to install Go on your device. It is recommended you use this if you do not want to (re)configure anything.

Usage:

 cd ~/ChargePi-go/docs
 chmod +x install-dependencies.sh
 ./install-dependencies.sh 1

Building libnfc for PN532​

  1. Get and extract the libnfc:

     cd ~
     mkdir libnfc && cd libnfc/
     wget https://github.com/nfc-tools/libnfc/releases/download/libnfc-1.8.0/libnfc-1.8.0.tar.bz2
     tar -xvjf libnfc-1.8.0.tar.bz2

    Next two steps may vary for your reader and communication protocol

  2. Create PN532 configuration:

     cd libnfc-1.8.0
     sudo mkdir /etc/nfc
     sudo mkdir /etc/nfc/devices.d
     sudo cp contrib/libnfc/pn532_uart_on_rpi.conf.sample /etc/nfc/devices.d/pn532_uart_on_rpi.conf 
     sudo nano /etc/nfc/devices.d/pn532_uart_on_rpi.conf

  3. Add the line at the end of the file:

    allow_intrusive_scan = true

  4. Install dependencies and configure:

     sudo apt-get install autoconf
     sudo apt-get install libtool
     sudo apt-get install libpcsclite-dev libusb-dev
     autoreconf -vis
     ./configure --with-drivers=pn532_uart --sysconfdir=/etc --prefix=/usr

  5. Build the library:

    sudo make clean
    sudo make install all

Installing rpi-ws281x library​

Follow the instructions from the maintainer's repository.

TLDR; Use the instructions here

git clone https://github.com/jgarff/rpi_ws281x
cd rpi_ws281x
mkdir build
cd build
cmake -D BUILD_SHARED=OFF -D BUILD_TEST=ON ..
cmake --build .
sudo make install

To be able to use this C library in Go, it must be installed. You can do this by copying *.h to /usr/local/include and '.a files to /usr/local/lib. If not working, check the Go wrapper library instructions here.