OLD_NERVES_RUNTIME.md

Loading WiFi kernel module (unnecessary for newer versions of nerves_runtime)

Note If you are using nerves_runtime >= 0.3.0 the kernel module will be auto loaded by default, and this step is not necessary.

Before WiFi will work, you will need to load any modules for your device if they aren't loaded already. Here's an example for Raspberry Pi 0 and Raspberry Pi 3:

defmodule MyApplication do
  use Application

  def start(_type, _args) do
    import Supervisor.Spec, warn: false

    children = [
      worker(Task, [fn -> init_kernel_modules() end], restart: :transient, id: Nerves.Init.KernelModules)
    ]

    opts = [strategy: :one_for_one, name: MyApplication.Supervisor]
    Supervisor.start_link(children, opts)
  end

  def init_kernel_modules() do
    {_, 0} = System.cmd("modprobe", ["brcmfmac"])
  end
end