Node.js package for reading and parsing data from the P1 port of a Dutch Smart Meter. Data is parsed according to the official DSMR4.0 specification by Netbeheer Nederland, which is currently used by most popular Kaifa and Landis+Gyr Smart Meters.

The serial connection is automatically opened on initiating the P1-Reader. Use the reading event to start receiving data, which should come in every 10 seconds.

var P1Reader = require('p1-reader');
var p1Reader = new P1Reader();

p1Reader.on('reading', function(data) {
    console.log('Currently consuming: ' + data.electricity.received.actual.reading + data.electricity.received.actual.unit);
});

p1Reader.on('error', function(err) {
    console.log('Error while reading: ' + err);
});

The module emits the following events:

• connected : When a connection with the Smart Meter was successfully setup
• reading : When a reading is received via the serial connection (should be on a 10 second interval)
• reading-raw : Same as the reading event but instead returning the raw data as a string
• error : When the serial connection emits an error
• close : When the serial connection closes for some reason

The reading event returns the following data structure:

{
    "meterType": "ISk5\2MT382-1000",
    "version": "42",
    "timestamp": "2010-12-09T10:30:20.000Z",
    "equipmentId": "4B384547303034303436333935353037",
    "textMessage": {
        "codes": "3031203631203831",
        "message": "0123456789:;<=>?0123456789:;<=>?0123456789:;<=>?0123456789:;<=>?0123456789:;<=>?"
    },
    "electricity": {
        "received": {
            "tariff1": {
                "reading": 123456.789,
                "unit": "kWh"
            },
            "tariff2": {
                "reading": 123456.789,
                "unit": "kWh"
            },
            "actual": {
                "reading": 1.193,
                "unit": "kW"
            }
        },
        "delivered": {
            "tariff1": {
                "reading": 123456.789,
                "unit": "kWh"
            },
            "tariff2": {
                "reading": 123456.789,
                "unit": "kWh"
            },
            "actual": {
                "reading": 0,
                "unit": "kW"
            }
        },
        "tariffIndicator": 2,
        "threshold": {
            "value": 16.1,
            "unit": "kW"
        },
        "switchPosition": "1",
        "numberOfPowerFailures": 4,
        "numberOfLongPowerFailures": 2,
        "longPowerFailureLog": {
            "count": 2,
            "log": [
                {
                    "startOfFailure": "2010-12-08T14:20:15.000Z",
                    "endOfFailure": "2010-12-08T14:24:15.000Z",
                    "duration": 240,
                    "unit": "s"
                },
                {
                    "startOfFailure": "2010-12-08T14:05:03.000Z",
                    "endOfFailure": "2010-12-08T14:10:04.000Z",
                    "duration": 301,
                    "unit": "s"
                }
            ]
        },
        "voltageSags": {
            "L1": 2,
            "L2": 1,
            "L3": 0
        },
        "voltageSwell": {
            "L1": 0,
            "L2": 3,
            "L3": 0
        },
        "instantaneous": {
            "current": {
                "L1": {
                    "reading": 1,
                    "unit": "A"
                },
                "L2": {
                    "reading": 2,
                    "unit": "A"
                },
                "L3": {
                    "reading": 3,
                    "unit": "A"
                }
            },
            "power": {
                "positive": {
                    "L1": {
                        "reading": 1.111,
                        "unit": "kW"
                    },
                    "L2": {
                        "reading": 2.222,
                        "unit": "kW"
                    },
                    "L3": {
                        "reading": 3.333,
                        "unit": "kW"
                    }
                },
                "negative": {
                    "L1": {
                        "reading": 4.444,
                        "unit": "kW"
                    },
                    "L2": {
                        "reading": 5.555,
                        "unit": "kW"
                    },
                    "L3": {
                        "reading": 6.666,
                        "unit": "kW"
                    }
                }
            }
        }
    },
    "gas": {
        "deviceType": "003",
        "equipmentId": "3232323241424344313233343536373839",
        "timestamp": "2010-12-09T10:00:00.000Z",
        "reading": 12785.123,
        "unit": "m3",
        "valvePosition": "1"
    }
}

Since your development machine is usually not connected to the serial port directly the emulator mode can be enabled. When enabled the module will not connect to a serial port but instead will use a mocked version that will emit messages according to the DSMR 4.0 specification.

The emulator will emit a reading event every 10 seconds just like an actual Smart Meter would do with the most important variables (timestamp, electricity.received.tariff1, electricity.received.actual, gas.timestamp and gas.reading) being incremented.

Provide the emulator option parameter to run the module in emulator mode:

var p1Reader = new P1Reader({emulator: true});

The emulator defaults can be overriden by passing an emulatorOverrides object, which can contain the following parameters:

• electricityOffset : Starting value of electricity on tariff 1 in kWh (default: 0)
• electricityIncrement : Incremental value (every 10 seconds) of electricity on tariff 1 in kW (default: 0.1)
• gasOffset : Starting value of gas in m3 (default: 0)
• gasIncrement : Incremental value (every hour) of gas in m3 (default: 0.1)
• interval : Interval (in seconds) in which readings are emitted (default: 10)
• intervalGas Interval (in seconds) in which the gas reading is incremented (default: 3600)

In debug mode all raw and parsed packages are written to 2 separate log files (debug-data-raw.log and debug-data-parsed.log) and stored in the directory from which the module was triggered.

Provide the debug option parameter to run the module in debug mode:

var p1Reader = new P1Reader({debug: true});

If for some reason the automatic serial port discovery does not work it is possible to force a certain port with a specific configuration.

Provide a serialPort object as option parameter to set a specific serial port configuration. The object should contain all of the following field:

• port : Portname of the serial port on which the Smart Meter is connected (e.g. '/dev/tty-usbserial1')
• baudRate : Baud rate of the serial port (e.g. '9600' or '115200')
• parity : Parity of the serial port (e.g. 'none' or 'even')
• dataBits : Number of data bits used for the serial port (e.g. '7' or '8')
• stopBits : Number of stop bits used for the serial port (e.g. '1')

The official DSMR Smart Meter P1 interface documentation from Netbeheer Nederland can be found here: http://www.netbeheernederland.nl/publicaties/publicatie/?documentregistrationid=1745033 This documentation was used as a reference to create and verify this module.

1.5.1

• Small fix for bug that broke the emulator since last version

1.5.0

• Serial port auto discovery function now also tries different configurations to allow to automatically connect to any DSMR 4+ Smart Meter
• Allow forcing both a specific port and configuration (baudrate, parity, databits and stopbits) - Note that the "port" parameter is replaced, which is not backwards compatible
• Removing the "crash on purpose" when a smart meter could not be found
• Improving debug logging for better traceability of issues
• Upgrading "node-serialport" dependency to latest version for improved stability
• Applying ES6 standards to code

1.4.1

• Minor bug fix on incorrectly returning the LongPowerFailureLog object

1.4.0

• Exposing and calculating the datetime of the start of a LongPowerFailure
• Added the 'reading-raw' event to retrieve the raw data (as a string) that was retrieved from the Smart Meter

1.3.1

• Added option to control the interval of the emulator mode via an option parameter

1.3.0

• Added emulator mode for development purposes
• Extended example with all possible option parameters

1.2.0

• Upgraded serialport to 4.0.7
• Serial port is now automatically locked preventing other processes from opening it
• Added 'connected' event
• Exposed used serial port name via getSerialPort()

1.1.1

• Minor bug fix

1.1.0

• Added option to force a specific port
• Log more debugging information

1.0.1

• Updated readme

1.0.0

• Initial version with full DSMR 4.0 specification implemented