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Elixir Z-Wave library
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lib/grizzly/zwave/commands/basic_set.ex
defmodule Grizzly.ZWave.Commands.BasicSet do
@moduledoc """
This module implements the BASIC_SET command of the COMMAND_CLASS_BASIC
command class
Params:
* `:value` - :on or :off
"""
@behaviour Grizzly.ZWave.Command
alias Grizzly.ZWave.{Command, DecodeError}
alias Grizzly.ZWave.CommandClasses.Basic
@type param :: {:value, :on | :off}
@impl true
def new(params) do
command = %Command{
name: :basic_set,
command_byte: 0x01,
command_class: Basic,
params: params,
impl: __MODULE__
}
{:ok, command}
end
@impl true
def encode_params(command) do
value_byte = encode_value(Command.param!(command, :value))
<<value_byte>>
end
@impl true
def decode_params(<<value_byte>>) do
case value_from_byte(value_byte) do
{:ok, value} ->
{:ok, [value: value]}
{:error, %DecodeError{}} = error ->
error
end
end
defp encode_value(:on), do: 0xFF
defp encode_value(:off), do: 0x00
defp value_from_byte(0x00), do: {:ok, :off}
defp value_from_byte(0xFF), do: {:ok, :on}
defp value_from_byte(byte),
do: {:error, %DecodeError{value: byte, param: :value, command: :basic_set}}
end