MTKcoder

The MTKcoder measures even the smallest flow rates. Perfect areas of application are measuring points that are difficult to access, such as in manholes or in the automation of fixed network readout.

Product Datasheet

Datenblatt DE

953KB

GWF_MTKcoder_MP.pdf

pdf

215KB

Richtwerte-zur-Bestimmung-der-Wasserzähler.pdf

pdf

Montage

1MB

GWF-Wasserzaehler_Montage.pdf

pdf

Device Profile for Tesenso IoT Cloud

678B

gwf_wasserz_hler.json

677B

gwf_water_meter_60.json

682B

gwf_warm_water_meter_60.json

698B

gwf_water_meter.json

Device Labels

in manual	dataKey	dataType	dataFormat
Hauswasserzähler	waterMeter	telemetry	float

Decoder/Payload Converter for Tesenso IoT Cloud

https://github.com/Tesenso-GmbH/Device-Decoder/blob/main/GWF_MTKcoder.js

//V1.0, 20.12.2021,DS

if (msg.data) {
    var decoded = decodeFromHex(msg.data);
    decoded.ts = msg.ts;
    decoded.rssi = msg.rssi;
    decoded.snr = msg.snr;
    decoded.toa = msg.toa;
    decoded.frequency = msg.frequency;
    decoded.dr = msg.dr;
    decoded.bat = decodeBattery(msg.bat);
    decoded.hex = msg.data;

    return {
        msg: decoded,
        metadata: metadata,
        msgType: msgType
    };
} else {
    return {
        msg: msg,
        metadata: metadata,
        msgType: msgType
    };
}


function decodeFromHex(data) {

    var telemetry = {};

    //var batteryStatus = BatteryStatus.CalculateBatterStatus((int) rawMessageSection.bat);

    // Unstring input payload according to the specification
    //string protocolType = sensorData.Substring(0, 2);
    //string meterManufacturerID = sensorData.Substring(2, 4);
    //string meterID = sensorData.Substring(6, 8);
    var meterMedium = data.substr(14, 2);
    //telemetry.meterMedium = meterMedium;
    var stateMbus = data.substr(16, 2);
    //telemetry.stateMbus = stateMbus;
    //string actualityDuration = sensorData.Substring(18, 4);
    var volumeVIF = data.substr(22, 2);
    //telemetry.volumeVIF = volumeVIF;
    var volumeValue = data.substr(24, 8);
    //telemetry.volumeValue = volumeValue;
    //string additionalFunctions = sensorData.Substring(32, 2);
    //string batteryLifetime = sensorData.Substring(34, 2);
    //string checksum = sensorData.Substring(36, 4);

    telemetry.unit = "m3";

    if (meterMedium == "07" && (stateMbus == "00" |
            stateMbus == "04")) {
        telemetry.waterMeter =
            GetMeterReadingWarmWater(volumeVIF,
            volumeValue);
    }


    return telemetry;

}

function decodeBattery(byte) {
    if (byte == 0) {
        return 'External power source';
    } else if (byte > 0 && byte < 255) {
        return byte / 254 * 100;
    } else {
        return 'Unknown battery state';
    }
}

// Decode Payload for the meter reading warm water
function GetMeterReadingWarmWater(volumeVIF, volumeValue) {

    
    var volumeValueLSB = volumeValue.substr(6, 2) +
        volumeValue.substr(4, 2) + volumeValue.substr(2,
            2) + volumeValue.substr(0, 2);

    var measurementResult = parseInt(volumeValueLSB,
        16);

    switch (volumeVIF) {
        case "10":
            measurementResult *=
                0.000001; // (10 ^ (-6));
            break;
        case "11":
            measurementResult *=
                0.00001; // (10 ^ (-5));
            break;
        case "12":
            measurementResult *= 0.0001; // (10 ^ (-4));
            break;
        case "13":
            measurementResult *= 0.001; // (10 ^ (-3));
            break;
        case "14":
            measurementResult *= 0.01; // (10 ^ (-2));
            break;
        case "15":
            measurementResult *= 0.1; // (10 ^ (-1));
            break;
        default:
            break;
    }

    return measurementResult;
}

ThingsBoard Converter Export

3KB

decoder_gwf_water_meter.json

3KB

decoder_gwf_warm_water_meter_60.json

3KB

decoder_gwf_water_meter_60.json

16KB

decoder_tesenso_m_bus_v4_gwf_wasser (1).json

Uplink documentation

sample Uplink message

{
    "cmd": "gw",
    "seqno": 114935,
    "EUI": "10CE45FFFE00AAAD",
    "ts": 1660726181716,
    "fcnt": 4198,
    "port": 2,
    "freq": 867300000,
    "toa": 97,
    "dr": "SF7 BW125 4/5",
    "ack": false,
    "gws": [{
        "rssi": -41,
        "snr": 9.8,
        "ts": 1660726181716,
        "time": "2022-08-17T08:49:41.585149Z",
        "gweui": "9C65F9FFFF386C4F",
        "ant": 0,
        "lat": 46.8076885,
        "lon": 7.100528
    }],
    "bat": 0,
    "data": "230400681b1b6808007200375316e61e3c07040000000c78003753160c13580319173316",
    "_id": "62fcaba53184c84733df3296"
}

Downlink documentation