P1 Parser

Parses telegram's as they are output through the P1 serial port of a smartmeter

Note that this only applies to Dutch smartmeters.

Installation

def deps do
  [
    {:p1_parser, "~> 0.1.5"}
  ]
end

Get a usb to p1 cable and plug it in, you should see it appear as a serial device

On an raspberry pi it will show up as /dev/ttyUSB0, now the smartmeter will ouput a telegram every 10 seconds

use a serial libray like nerves_uart to connect to it and receive telegrams

each line in the telegram can now be parsed like this

iex> P1.parse!("1-0:1.8.1(123456.789*kWh)") |> P1.to_struct

Which will result in

%P1.Telegram.TotalEnergy{direction: :consume, tariff: :low, unit: "kWh", value: 123456.789}

|> fork |> feature branch |> pull request