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, "~> 0.2.2"}
  ]
end

Usage

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 x seconds

use a serial libray like for instance 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)")

Which will result in

[
  %P1.Channel{channel: 0, medium: :electricity},
  %P1.Tags{tags: [:total, :energy, :consume, :low]},
  [%P1.Value{unit: "kWh", value: 123456.789}]
]

Documentation

The docs can be found at https://hexdocs.pm/p1_parser.

Contribute

|> fork |> feature branch |> pull request

Reference

I used https://www.netbeheernederland.nl/_upload/Files/Slimme_meter_15_a727fce1f1.pdf as a reference

Todo's

• Parse units
• Parse Summer/Winter time information in timestamp
• return structs
• Convert timestamps to proper date/times
• Parse entire telegram
• Validate checksum