jmerriweather/nerves_io_pn532

Elixir library to work with the NXP PN532 RFID module

Nerves.IO.PN532

Hardware

Any PN532 board should work as long as it supports UART, I've been using the following board to develop.

NFC/RFID PN532 breakout Module

Installation

If available in Hex, the package can be installed as:

1. Add nerves_io_pn532 to your list of dependencies in mix.exs:

```elixir
def deps do
  [{:nerves_io_pn532, "~> 0.1.0"}]
end
```

2. Ensure nerves_io_pn532 is started before your application:

```elixir
def application do
  [applications: [:nerves_io_pn532]]
end
```

How to use

defmodule MifareClientImplementation do
  use Nerves.IO.PN532.MifareClient

  def card_detected(card = %{tg: target_number, sens_res: sens_res, sel_res: sel_res, nfcid: identifier}) do
    Logger.info("Detected new Mifare card with ID: #{Base.encode16(identifier)}")
  end

  def card_lost(card = %{tg: target_number, sens_res: sens_res, sel_res: sel_res, nfcid: identifier}) do
    Logger.info("Lost connection with Mifare card with ID: #{Base.encode16(identifier)}")
  end
end

defmodule Example do
  def main do
    with {:ok, pid} <- MifareClientImplementation.start_link(),
         :ok <- MifareClientImplementation.open(pid, "COM3"),
         :ok <- MifareClientImplementation.start_target_detection(pid) do
      # ...
    end
  end
end