89 lines
2.2 KiB
Elixir
89 lines
2.2 KiB
Elixir
defmodule Parser.Telemetry do
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@moduledoc """
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APRS telemetry parsing.
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"""
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@doc """
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Parse an APRS telemetry string. Returns a struct or error.
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"""
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@spec parse(String.t()) :: map() | nil
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def parse("T#" <> rest) do
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case String.split(rest, ",") do
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[seq | [_ | _] = values] ->
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analog_values = Enum.take(values, 5)
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digital_values = values |> Enum.drop(5) |> Enum.take(8)
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%{
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sequence_number: Parser.TelemetryHelpers.parse_telemetry_sequence(seq),
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analog_values: Parser.TelemetryHelpers.parse_analog_values(analog_values),
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digital_values: Parser.TelemetryHelpers.parse_digital_values(digital_values),
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data_type: :telemetry,
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raw_data: rest
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}
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_ ->
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%{
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raw_data: rest,
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data_type: :telemetry
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}
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end
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end
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def parse(<<":PARM.", rest::binary>>) do
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%{
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data_type: :telemetry_parameters,
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parameter_names: String.split(rest, ",", trim: true),
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raw_data: rest
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}
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end
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def parse(<<":EQNS.", rest::binary>>) do
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equations =
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rest
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|> String.split(",", trim: true)
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|> Enum.chunk_every(3)
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|> Enum.map(fn [a, b, c] ->
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%{
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a: Parser.TelemetryHelpers.parse_coefficient(a),
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b: Parser.TelemetryHelpers.parse_coefficient(b),
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c: Parser.TelemetryHelpers.parse_coefficient(c)
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}
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end)
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%{
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data_type: :telemetry_equations,
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equations: equations,
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raw_data: rest
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}
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end
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def parse(<<":UNIT.", rest::binary>>) do
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%{
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data_type: :telemetry_units,
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units: String.split(rest, ",", trim: true),
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raw_data: rest
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}
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end
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def parse(<<":BITS.", rest::binary>>) do
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case String.split(rest, ",", trim: true) do
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[bits_sense | project_names] ->
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%{
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data_type: :telemetry_bits,
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bits_sense: String.to_charlist(bits_sense),
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project_names: project_names,
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raw_data: rest
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}
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[] ->
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%{
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data_type: :telemetry_bits,
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bits_sense: [],
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project_names: [],
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raw_data: rest
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}
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end
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end
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def parse(data), do: %{raw_data: data, data_type: :telemetry}
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end
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