> For the complete documentation index, see [llms.txt](https://enless.gitbook.io/centre-aide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://enless.gitbook.io/centre-aide/ressources/gateway-lorawan/decodeurs-capteurs-tiers/eastron-sdm230mct-and-sdm630mct.md). # 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 %} --- # Agent Instructions This documentation is published with GitBook. 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