Crate dsmr_parse

dsmr-parse

A small library for parsing DSMR 5 (Dutch Smart Meter Requirements) telegrams from Dutch electricity meters.

The central struct is Telegram with its single method Telegram::read_from. Pass anything that implements std::io::Read to it, and it will try to read a valid and conforming DSMR telegram with the correct CRC from it.

Usage

Reading from a serial port

use dsmr_parse::Telegram;

// Open serial port (example path)
let port = serialport::new("/dev/ttyUSB0", 115_200);

// Parse telegram
match Telegram::read_from(port.open().unwrap()) {
    Ok(Some(telegram)) => println!("Read telegram: {telegram:?}"),
    Ok(None) => eprintln!("No complete telegram read"),
    Err(e) => eprintln!("Parse error: {e}"),
}

Reading from a byte slice

use dsmr_parse::Telegram;

let telegram_data = b"/XMX5LGBBFG1009394887\r\n\r\n1-3:0.2.8(42)\r\n0-0:1.0.0(190101125431W)\r\n1-0:1.8.1(004169.415*kWh)\r\n!1234\r\n";

match Telegram::read_from(telegram_data.as_slice()) {
    Ok(Some(telegram)) => println!("Read telegram: {telegram:?}"),
    Ok(None) => println!("No complete telegram in data"),
    Err(e) => eprintln!("Parse error: {e}"),
}

Potential Pitfalls

• CRC Validation: telegrams with incorrect CRC checksums will be rejected. Ensure data integrity during transmission, especially when reading from serial ports with poor connections.
• Serial Port Configuration: DSMR meters typically use 115200 baud, 8N1: 8 data bits, no parity, 1 stop bit. Incorrect settings will result in garbled data and parse errors.

Specification

P1 Companion Standard 5.0.2

Structs

PowerFailureEntry

Telegram

Valid telegram

Tst

A point in time as reported by the meter

UnitValue

A single value with an optional unit attached to it

Enums

Error