# Eastron SDM230MCT & SDM630MCT

{% hint style="info" %}
Les codecs et mappings suivants couvrent uniquement les SDM230MCT et SDM630MCT dans leurs configurations initiales.
{% endhint %}

## Eastron SDM230MCT

### Codec

{% code title="eastron-SDM230MCT-LoRa.codec.js" lineNumbers="true" expandable="true" %}

```js
// round a number to a set number of places whilst avoiding floating point precision errors
function epsilonRound(num, places) {
    return Math.round((num + Math.pow(2, -52)) * Math.pow(10, places)) / Math.pow(10, places);
}

// convert a byte to uint8
function bytesToUInt8(bytes) {
    return parseInt(bytes[0]);
}

// convert 2 bytes to a uint16
function bytesToUInt16(bytes) {
    console.log(bytes);
    var result = (bytes[0] << 8) | bytes[1];
    return parseInt(result);
}

// convert 4 bytes to a uint32
function bytesToUInt32(bytes) {
    var result = (bytes[0] << 24) | (bytes[1] << 16) | (bytes[2] << 8) | bytes[3];
    return parseInt(result);
}

// convert 4 bytes to a float32
function bytesToFloat32(bytes) {
    var bits = bytes[0] << 24 | bytes[1] << 16 | bytes[2] << 8 | bytes[3];
    var sign = (bits >>> 31 === 0) ? 1.0 : -1.0;
    var e = bits >>> 23 & 0xff;
    var m = (e === 0) ? (bits & 0x7fffff) << 1 : (bits & 0x7fffff) | 0x800000;
    var f = sign * m * Math.pow(2, e - 150);
    return parseFloat(f);
}

function decodeUplink(input) {

    var bytes = input.bytes;

    return {
        data: {
            serialNumber: bytesToUInt32(bytes.slice(0, 4)),
            totalEnergy: epsilonRound(bytesToFloat32(bytes.slice(6, 10)), 3) * 1000,
            voltage: epsilonRound(bytesToFloat32(bytes.slice(10, 14)), 3) * 1000,
            totalCurrent: epsilonRound(bytesToFloat32(bytes.slice(14, 18)), 3) * 1000,
            powerFactor: epsilonRound(bytesToFloat32(bytes.slice(18, 22)), 3) * 1000,
            frequency: epsilonRound(bytesToFloat32(bytes.slice(22, 26)), 3) * 1000
        }
    };
}
```

{% endcode %}

### Mapping

{% code title="eastron-SDM230MCT-LoRa.codec.mapping.json" lineNumbers="true" expandable="true" %}

```json
{
  "uplink":{
    "fields":[
      {
        "name":"serialNumber",
        "description":"Serial number",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"totalEnergy",
        "description":"Total energy",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"Wh",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"voltage",
        "description":"Voltage",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"mV",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"frequency",
        "description":"Frequency",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"0.001 Hz",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"powerFactor",
        "description":"Power factor",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"totalCurrent",
        "description":"Total current",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"mA",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      }
    ]
  },
  "lns_metadata":{
    "fields":[
      {
        "name":"rssi",
        "description":"Received RSSI",
        "data_type":"NUMBER",
        "numeric_type":"INT16",
        "access_mode":"R",
        "unit":"dBm",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "offset":1,
            "factor":1
          }
        }
      },
      {
        "name":"snr",
        "description":"Received SNR",
        "data_type":"NUMBER",
        "numeric_type":"INT16",
        "access_mode":"R",
        "unit":"dB",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "offset":2,
            "factor":1
          }
        }
      },
      {
        "name":"sf",
        "description":"Spreading Factor",
        "data_type":"NUMBER",
        "numeric_type":"UINT8",
        "access_mode":"R",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "offset":3,
            "factor":1
          }
        }
      },
      {
        "name":"minutesSinceLastRx",
        "description":"Minutes since last reception",
        "data_type":"NUMBER",
        "numeric_type":"UINT16",
        "access_mode":"R",
        "unit":"min",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "offset":4,
            "factor":1
          }
        }
      }
    ]
  }
}
```

{% endcode %}

## SDM630MCT

### Codec

{% code title="eastron-SDM630MCT-LoRa.codec.js" lineNumbers="true" expandable="true" %}

```js
// round a number to a set number of places whilst avoiding floating point precision errors
function epsilonRound(num, places) {
    return Math.round((num + Math.pow(2, -52)) * Math.pow(10, places)) / Math.pow(10, places);
}

// convert a byte to uint8
function bytesToUInt8(bytes) {
    return parseInt(bytes[0]);
}

// convert 2 bytes to a uint16
function bytesToUInt16(bytes) {
    console.log(bytes);
    var result = (bytes[0] << 8) | bytes[1];
    return parseInt(result);
}

// convert 4 bytes to a uint32
function bytesToUInt32(bytes) {
    var result = (bytes[0] << 24) | (bytes[1] << 16) | (bytes[2] << 8) | bytes[3];
    return parseInt(result);
}

// convert 4 bytes to a float32
function bytesToFloat32(bytes) {
    var bits = bytes[0] << 24 | bytes[1] << 16 | bytes[2] << 8 | bytes[3];
    var sign = (bits >>> 31 === 0) ? 1.0 : -1.0;
    var e = bits >>> 23 & 0xff;
    var m = (e === 0) ? (bits & 0x7fffff) << 1 : (bits & 0x7fffff) | 0x800000;
    var f = sign * m * Math.pow(2, e - 150);
    return parseFloat(f);
}

function decodeUplink(input) {

    var bytes = input.bytes;

    return {
        data: {
            serialNumber: bytesToUInt32(bytes.slice(0, 4)),
            totalEnergy: epsilonRound(bytesToFloat32(bytes.slice(6, 10)), 3) * 1000,
            frequency: epsilonRound(bytesToFloat32(bytes.slice(10, 14)), 3) * 1000,
            totalPowerFactor: epsilonRound(bytesToFloat32(bytes.slice(14, 18)), 3) * 1000,
            maxTotalSystemPowerDemand: epsilonRound(bytesToFloat32(bytes.slice(18, 22)), 3) * 1000,
            totalCurrent: epsilonRound(bytesToFloat32(bytes.slice(22, 26)), 3) * 1000
        }
    };
}
```

{% endcode %}

### Mapping

{% code title="eastron-SDM630MCT-LoRa.codec.mapping.json" lineNumbers="true" expandable="true" %}

```json
{
  "uplink":{
    "fields":[
      {
        "name":"serialNumber",
        "description":"Serial number",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"totalEnergy",
        "description":"Total energy",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"Wh",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"frequency",
        "description":"Frequency",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"0.001 Hz",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"totalPowerFactor",
        "description":"Total power factor",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"maxTotalSystemPowerDemand",
        "description":"Maximum Total System Power Demand",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"mW",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      },
      {
        "name":"totalCurrent",
        "description":"Total current",
        "data_type":"NUMBER",
        "numeric_type":"UINT32",
        "access_mode":"R",
        "unit":"mA",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "factor":1
          }
        }
      }
    ]
  },
  "lns_metadata":{
    "fields":[
      {
        "name":"rssi",
        "description":"Received RSSI",
        "data_type":"NUMBER",
        "numeric_type":"INT16",
        "access_mode":"R",
        "unit":"dBm",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "offset":1,
            "factor":1
          }
        }
      },
      {
        "name":"snr",
        "description":"Received SNR",
        "data_type":"NUMBER",
        "numeric_type":"INT16",
        "access_mode":"R",
        "unit":"dB",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "offset":2,
            "factor":1
          }
        }
      },
      {
        "name":"sf",
        "description":"Spreading Factor",
        "data_type":"NUMBER",
        "numeric_type":"UINT8",
        "access_mode":"R",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "offset":3,
            "factor":1
          }
        }
      },
      {
        "name":"minutesSinceLastRx",
        "description":"Minutes since last reception",
        "data_type":"NUMBER",
        "numeric_type":"UINT16",
        "access_mode":"R",
        "unit":"min",
        "protocol_specific":{
          "modbus":{
            "register_type":"input",
            "offset":4,
            "factor":1
          }
        }
      }
    ]
  }
}
```

{% endcode %}


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