localhorst/TTN-VEGAPULS-Air-exporter
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TTN-VEGAPULS-Air-exporter/payload_formatter.js

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/*
JS payload formatter for decoding VEGAPULS Air TTN payload
change the following line to run the script with 'node payload_formatter.js' for debugging
*/
const debug = false
if (debug) {
function main() {
const decoded_payload = [0x08, 0x42, 0x28, 0xF5, 0xC3, 0x01, 0x02, 0x00, 0x2A, 0x03, 0x04];
var decoded = Decoder(decoded_payload, 0x01);
console.log(decoded);
}
if (require.main === module) {
main();
}
}
function Decoder(frm_payload, f_port) {
if (debug) {
console.log(frm_payload);
}
function bytesToFloat(bytesToDecode) {
// JavaScript bitwise operators yield a 32 bits integer, not a float.
// Assume LSB (least significant byte first).
var bits = bytesToDecode[0] << 24 | bytesToDecode[1] << 16 | bytesToDecode[2] << 8 | bytesToDecode[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 f;
}
function bytesToInt16(bytesToDecode) {
var tmpInt16 = (bytesToDecode[0] << 24 >> 16) | bytesToDecode[1];
return tmpInt16;
}
function bytesToUInt32(bytesToDecode) {
var tmpUInt32 = bytesToDecode[0] * 256 * 256 * 256 + bytesToDecode[1] * 256 * 256 + bytesToDecode[2] * 256 + bytesToDecode[3];
return tmpUInt32;
}
if (frm_payload.length < 1) {
if (debug) {
console.log("Invalid payload length");
}
return null;
}
var decoded = {};
decoded.raw_frm_payload = frm_payload;
decoded.PacketIdentifier = frm_payload[0];
switch (decoded.PacketIdentifier) {
case 8: // OKAY
decoded.Distance = bytesToFloat(frm_payload.slice(1, 5));
decoded.Unit = frm_payload[5];
decoded.RemainingPower = frm_payload[6];
decoded.Temperature = bytesToInt16(frm_payload.slice(7, 9));
decoded.UnitTemperature = frm_payload[9];
decoded.Inclination_degree = frm_payload[10];
break;
case 9: // OKAY AND GPS
decoded.Distance = bytesToFloat(frm_payload.slice(1, 5));
decoded.Unit = frm_payload[5];
decoded.RemainingPower = frm_payload[6];
decoded.GNSSLatitude = bytesToFloat(frm_payload.slice(7, 11));
decoded.GNSSLongitude = bytesToFloat(frm_payload.slice(11, 15));
decoded.Temperature = bytesToInt16(frm_payload.slice(15, 17));
decoded.UnitTemperature = frm_payload[17];
decoded.Inclination_degree = frm_payload[18];
break;
case 10: // ERROR
decoded.NamurState = frm_payload[1];
decoded.Distance = bytesToFloat(frm_payload.slice(2, 6));
decoded.Unit = frm_payload[6];
decoded.RemainingPower = frm_payload[7];
decoded.DetailState = bytesToUInt32(frm_payload.slice(8, 12));
decoded.Temperature = bytesToInt16(frm_payload.slice(12, 14));
decoded.UnitTemperature = frm_payload[14];
decoded.Inclination_degree = frm_payload[15];
break;
case 11: // ERROR AND GPS
decoded.NamurState = frm_payload[1];
decoded.Distance = bytesToFloat(frm_payload.slice(2, 6));
decoded.Unit = frm_payload[6];
decoded.RemainingPower = frm_payload[7];
decoded.GNSSLatitude = bytesToFloat(frm_payload.slice(8, 12));
decoded.GNSSLongitude = bytesToFloat(frm_payload.slice(12, 16));
decoded.DetailState = bytesToUInt32(frm_payload.slice(16, 20));
decoded.Temperature = bytesToInt16(frm_payload.slice(20, 22));
decoded.UnitTemperature = frm_payload[22];
decoded.Inclination_degree = frm_payload[23];
break;
case 12: // MEASUREMENT OKAY
decoded.Distance = bytesToFloat(frm_payload.slice(1, 5));
decoded.Unit = frm_payload[5];
decoded.MvProcent = bytesToInt16(frm_payload.slice(6, 8));
decoded.MvLinProcent = bytesToInt16(frm_payload.slice(8, 10));
decoded.MvScaled = bytesToFloat(frm_payload.slice(10, 14));
decoded.MvScaledUnit = frm_payload[14];
decoded.RemainingPower = frm_payload[15];
decoded.Temperature = bytesToInt16(frm_payload.slice(16, 18));
decoded.UnitTemperature = frm_payload[18];
decoded.Inclination_degree = frm_payload[19];
break;
case 13: // MEASUREMENT OKAY AND GPS
decoded.Distance = bytesToFloat(frm_payload.slice(1, 5));
decoded.Unit = frm_payload[5];
decoded.MvProcent = bytesToInt16(frm_payload.slice(6, 8));
decoded.MvLinProcent = bytesToInt16(frm_payload.slice(8, 10));
decoded.MvScaled = bytesToFloat(frm_payload.slice(10, 14));
decoded.MvScaledUnit = frm_payload[14];
decoded.RemainingPower = frm_payload[15];
decoded.GNSSLatitude = bytesToFloat(frm_payload.slice(16, 20));
decoded.GNSSLongitude = bytesToFloat(frm_payload.slice(20, 24));
decoded.Temperature = bytesToInt16(frm_payload.slice(24, 26));
decoded.UnitTemperature = frm_payload[26];
decoded.Inclination_degree = frm_payload[27];
break;
case 14: // MEASUREMENT ERROR
decoded.NamurState = frm_payload[1];
decoded.Distance = bytesToFloat(frm_payload.slice(2, 6));
decoded.Unit = frm_payload[6];
decoded.MvProcent = bytesToInt16(frm_payload.slice(7, 9));
decoded.MvLinProcent = bytesToInt16(frm_payload.slice(9, 11));
decoded.MvScaled = bytesToFloat(frm_payload.slice(11, 15));
decoded.MvScaledUnit = frm_payload[15];
decoded.RemainingPower = frm_payload[16];
decoded.DetailState = bytesToUInt32(frm_payload.slice(17, 21));
decoded.Temperature = bytesToInt16(frm_payload.slice(21, 23));
decoded.UnitTemperature = frm_payload[23];
decoded.Inclination_degree = frm_payload[24];
break;
case 15: // MEASUREMENT ERROR AND GPS
decoded.NamurState = frm_payload[1];
decoded.Distance = bytesToFloat(frm_payload.slice(2, 6));
decoded.Unit = frm_payload[6];
decoded.MvProcent = bytesToInt16(frm_payload.slice(7, 9));
decoded.MvLinProcent = bytesToInt16(frm_payload.slice(9, 11));
decoded.MvScaled = bytesToFloat(frm_payload.slice(11, 15));
decoded.MvScaledUnit = frm_payload[15];
decoded.RemainingPower = frm_payload[16];
decoded.GNSSLatitude = bytesToFloat(frm_payload.slice(17, 21));
decoded.GNSSLongitude = bytesToFloat(frm_payload.slice(21, 25));
decoded.DetailState = bytesToUInt32(frm_payload.slice(25, 29));
decoded.Temperature = bytesToInt16(frm_payload.slice(29, 31));
decoded.UnitTemperature = frm_payload[31];
decoded.Inclination_degree = frm_payload[32];
break;
case 16: // INFORMATION PACKAGES 1
decoded.Information = frm_payload[1];
decoded.DtmID = bytesToUInt32(frm_payload.slice(2, 6));
decoded.ManufacturerID = bytesToUInt32(frm_payload.slice(6, 10));
decoded.DeviceType = bytesToUInt32(frm_payload.slice(10, 14));
decoded.SoverSystem = frm_payload[14];
decoded.SoverFunction = frm_payload[15];
decoded.SoverError = frm_payload[16];
decoded.SoverCustomer = frm_payload[17];
decoded.MeasureAndSendIntervall = bytesToUInt32(frm_payload.slice(18, 22)) | bytesToInt16(frm_payload.slice(22, 24)) | frm_payload[24];
decoded.ChangeCounter = bytesToInt16(frm_payload.slice(25, 27));
decoded.MvScaledMin = bytesToFloat(frm_payload.slice(27, 31));
decoded.MvScaledMax = bytesToFloat(frm_payload.slice(31, 35));
break;
case 17:
decoded.DeviceName = bytesToUInt32(frm_payload.slice(1, 5)) | bytesToUInt32(frm_payload.slice(5, 9)) | bytesToUInt32(frm_payload.slice(9, 13)) |
bytesToUInt32(frm_payload.slice(13, 17)) | bytesToInt16(frm_payload.slice(17, 19)) | frm_payload[19];
decoded.DeviceTag = bytesToUInt32(frm_payload.slice(20, 24)) | bytesToUInt32(frm_payload.slice(24, 29)) | bytesToUInt32(frm_payload.slice(29, 33)) |
bytesToUInt32(frm_payload.slice(33, 37)) | bytesToInt16(frm_payload.slice(37, 39)) | frm_payload[39];
break;
case 18: // US SF10 OKAY
decoded.Distance = bytesToFloat(frm_payload.slice(1, 5));
decoded.Unit = frm_payload[5];
decoded.RemainingPower = frm_payload[6];
decoded.Temperature = bytesToInt16(frm_payload.slice(7, 9));
decoded.UnitTemperature = frm_payload[9];
decoded.Inclination_degree = frm_payload[10];
break;
case 19: // US SF10 ERROR 1
decoded.NamurState = frm_payload[1];
decoded.Distance = bytesToFloat(frm_payload.slice(2, 6));
decoded.Unit = frm_payload[6];
decoded.RemainingPower = frm_payload[7];
decoded.Inclination_degree = frm_payload[8];
break;
case 20: // US SF10 ERROR 2
decoded.NamurState = frm_payload[1];
decoded.DetailState = bytesToUInt32(frm_payload.slice(8, 12));
decoded.Temperature = bytesToInt16(frm_payload.slice(12, 14));
decoded.UnitTemperature = frm_payload[14];
break;
case 21: // US SF10 GPS 
decoded.NamurState = frm_payload[1];
decoded.GNSSLatitude = bytesToFloat(frm_payload.slice(2, 6));
decoded.GNSSLongitude = bytesToFloat(frm_payload.slice(6, 10));
break;
case 22: // US SF10 MEASUREMENT
decoded.NamurState = frm_payload[1];
decoded.MvProcent = bytesToInt16(frm_payload.slice(2, 4));
decoded.MvLinProcent = bytesToInt16(frm_payload.slice(4, 6));
decoded.MvScaled = bytesToFloat(frm_payload.slice(6, 10));
decoded.MvScaledUnit = frm_payload[10];
break;
case 23: // US SF10 INFO1
decoded.NamurState = frm_payload[1];
decoded.Information = frm_payload[2];
decoded.DtmID = bytesToUInt32(frm_payload.slice(3, 6));
decoded.ManufacturerID = bytesToUInt32(frm_payload.slice(6, 10));
break;
case 24: // US SF10 INFO2
decoded.NamurState = frm_payload[1];
decoded.DeviceType = bytesToUInt32(frm_payload.slice(2, 6));
decoded.SoverSystem = frm_payload[6];
decoded.SoverFunction = frm_payload[7];
decoded.SoverError = frm_payload[8];
decoded.SoverCustomer = frm_payload[9];
break;
case 25: // US SF10 INFO3
decoded.NamurState = frm_payload[1];
decoded.MeasureAndSendIntervall = bytesToUInt32(frm_payload.slice(2, 6)) | bytesToInt16(frm_payload.slice(6, 8)) | frm_payload[8];
decoded.ChangeCounter = bytesToInt16(frm_payload.slice(9, 11));
break;
case 26: // US SF10 INFO4
decoded.NamurState = frm_payload[1];
decoded.MvScaledMin = bytesToFloat(frm_payload.slice(2, 6));
decoded.MvScaledMax = bytesToFloat(frm_payload.slice(6, 10));
break;
default:
if (debug) {
console.log("Invalid PacketIdentifier type: " + String(decoded.PacketIdentifier));
}
decoded = null;
break;
}
return decoded;
}
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