uart_broken.ex

defmodule UartListener do
  use GenServer

  @serial_port "/dev/cu.usbserial-2210" # e.g., "/dev/ttyUSB0"
  @baud_rate 115200

  # Client
  def start_link(args) do
    GenServer.start_link(__MODULE__, args, name: __MODULE__)
  end

  def send_data(pid, data) do
    GenServer.call(pid, {:send_data, data})
  end


  # Server
  # def init(%{port: port, speed: baud_rate} = state) do
  def init(%{} = state) do
      {:ok, pid} = Circuits.UART.start_link() do
      case Circuits.UART.open(pid, @serial_port, speed: @baud_rate, active: true) do 
        :ok -> {:ok, Map.put(state, :pid, pid) }
        {:error, reason} -> {:stop, reason}
      end

    end
  end

  def handle_info({:circuits_uart, _port, data}, state) do 
    IO.inspect(data, label: "Data")
    IO.inspect(state, label: "State")
    # testing = :erlang.binary_to_list(data) 
    #   |> Enum.map(fn x -> Integer.to_string(x, 16) end)
    # IO.inspect(testing, label: "Parsed")
    {:noreply, state}
  end
  
  # def terminate(_reason, %{uart: uart}) do
  #   Circuits.UART.close(uart)
  # end
end