Implements a PID Controller as a GenServer.

For more details about PID Controllers see the Wikipedia article.

If available in Hex, the package can be installed by adding ex_pid_controller to your list of dependencies in mix.exs:

def deps do
  [
    {:ex_pid_controller, "~> 0.1.0"}
  ]
end

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/ex_pid_controller.