This is what I needed. It is okay to use for test purposes.

defp net_status() do                                                                                                                       
  case HTTPoison.head("www.google.com") do                                                                                                 
    {:ok, _} -> Logger.debug("Internet connection: OK")                                                                                    
    {:error, _} -> Logger.error("No internet connection!")                                                                                 
  end                                                                                                                                      
end