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Elixir Z-Wave library
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lib/grizzly/zwave/commands/switch_binary_set.ex
defmodule Grizzly.ZWave.Commands.SwitchBinarySet do
@moduledoc """
Module for the SWITCH_BINARY_SET command
Params:
* `:target_value` - `:on` or `:off`(required)
* `:duration` - How long in seconds the switch should take to reach target value or the factory default (:default)
Beyond 127 seconds, the duration is truncated to the minute. E.g. 179s is 2 minutes and 180s is 3 minutes
(optional V2)
"""
@behaviour Grizzly.ZWave.Command
alias Grizzly.ZWave.{Command, DecodeError}
alias Grizzly.ZWave.CommandClasses.{SwitchBinary, SwitchSupport}
@type param :: {:target_value, :on | :off} | {:duration, SwitchSupport.duration()}
@impl Grizzly.ZWave.Command
def new(opts) do
# TODO: validate opts
command = %Command{
name: :switch_binary_set,
command_byte: 0x01,
command_class: SwitchBinary,
params: opts,
impl: __MODULE__
}
{:ok, command}
end
@impl Grizzly.ZWave.Command
def encode_params(command) do
target_value_byte = encode_target_value(Command.param!(command, :target_value))
case Command.param(command, :duration) do
nil ->
<<target_value_byte>>
duration ->
duration_byte = SwitchSupport.duration_to_byte(duration)
<<target_value_byte, duration_byte>>
end
end
def encode_target_value(:off), do: 0x00
def encode_target_value(:on), do: 0xFF
@impl Grizzly.ZWave.Command
def decode_params(<<target_value_byte>>) do
case target_value_from_byte(target_value_byte) do
{:ok, target_value} ->
{:ok, [target_value: target_value]}
{:error, %DecodeError{}} = error ->
error
end
end
def decode_params(<<target_value_byte, duration_byte>>) do
with {:ok, target_value} <- target_value_from_byte(target_value_byte),
{:ok, duration} <- SwitchSupport.duration_from_byte(duration_byte) do
{:ok, [target_value: target_value, duration: duration]}
else
{:error, %DecodeError{}} = error ->
error
end
end
defp target_value_from_byte(0x00), do: {:ok, :off}
defp target_value_from_byte(0xFF), do: {:ok, :on}
defp target_value_from_byte(byte),
do: {:error, %DecodeError{value: byte, param: :target_value, command: :switch_binary_report}}
end