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Elixir Z-Wave library
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lib/grizzly/command_class/sensor_multilevel/get.ex
defmodule Grizzly.CommandClass.SensorMultilevel.Get do
@moduledoc """
Command module for working with the SensorMultilevel command class GET command
Command Options:
* `:seq_number` - the sequence number used for Z/IP packet
* `:retries` - the number of attempts to send the command (default 2)
"""
@behaviour Grizzly.Command
alias Grizzly.Packet
alias Grizzly.Command.{EncodeError, Encoding}
alias Grizzly.CommandClass.MultilevelSensor
@type t :: %__MODULE__{
sensor_type: MultilevelSensor.level_type(),
sensor_scale: non_neg_integer,
seq_number: Grizzly.seq_number(),
retries: non_neg_integer()
}
@type opt :: {:seq_number, Grizzly.seq_number()} | {:retries, non_neg_integer()}
defstruct sensor_type: nil, sensor_scale: 1, seq_number: nil, retries: 2
@spec init([opt]) :: {:ok, t}
def init(opts) do
{:ok, struct(__MODULE__, opts)}
end
@spec encode(t) :: {:ok, binary} | {:error, EncodeError.t()}
def encode(%__MODULE__{
seq_number: seq_number,
sensor_type: nil,
sensor_scale: _sensor_scale
}) do
{:ok, Packet.header(seq_number) <> <<0x31, 0x04>>}
end
def encode(
%__MODULE__{
seq_number: seq_number,
sensor_type: _sensor_type,
sensor_scale: sensor_scale
} = command
) do
with {:ok, encoded} <-
Encoding.encode_and_validate_args(command, %{
sensor_type: {:encode_with, MultilevelSensor, :encode_type},
sensor_scale: {:bytes, 2}
}) do
binary =
Packet.header(seq_number) <>
<<
0x31,
0x04,
encoded.sensor_type,
0x00::size(3),
sensor_scale || 1::size(2),
0x00::size(3)
>>
{:ok, binary}
end
end
@spec handle_response(t, Packet.t()) ::
{:continue, t}
| {:done, {:error, :nack_response}}
| {:done, non_neg_integer}
| {:retry, t}
| {:queued, t()}
def handle_response(
%__MODULE__{seq_number: seq_number} = command,
%Packet{
seq_number: seq_number,
types: [:ack_response]
}
) do
{:continue, command}
end
def handle_response(
%__MODULE__{seq_number: seq_number, retries: 0},
%Packet{
seq_number: seq_number,
types: [:nack_response]
}
) do
{:done, {:error, :nack_response}}
end
def handle_response(
%__MODULE__{seq_number: seq_number, retries: n} = command,
%Packet{
seq_number: seq_number,
types: [:nack_response]
}
) do
{:retry, %{command | retries: n - 1}}
end
def handle_response(
_command,
%Packet{
body: %{
command_class: :sensor_multilevel,
command: :report,
value: value
}
}
) do
{:done, {:ok, value}}
end
def handle_response(
%__MODULE__{seq_number: seq_number} = command,
%Packet{
seq_number: seq_number,
types: [:nack_response, :nack_waiting]
} = packet
) do
if Packet.sleeping_delay?(packet) do
{:queued, command}
else
{:continue, command}
end
end
def handle_response(command, _), do: {:continue, command}
end