 /////////////////////////////////////////////////////////////////////////////////////////////////
// Diehl Metering SAS
// 67 rue du Rhone - F-68300 Saint Louis - France
// email : [email protected]
//
// Copyright 2020
//
// Decoding example for HRLc-G3 LoRaWAN with default configuration
// All available frames (DS51_1x, DS51_OE, DS51_A & DS51_2) are decoded.
// The code has been written for The Thing Network.
//
// The javascript code is provided for free, as an example for integration.
// Diehl Metering SAS is not responsible for any issues if customer re-uses the code as it is.
// Javascript code example provided is confidential and can not be re-used without NDA and
// without agreement from Diehl Metering SAS.
//
// Release :
// v1.4		M. Bijasson		Source code splitted between E17Z & Standard configuration
// v1.3		M. Bijasson		Add E17Z frames decoding (DS51_1 & DS51_2)
//							EC2 update with average values instead of lowest values
//							Bug fixed on negative midnight index value
//							Bug fixed on 4 most significant bits of cumulative Positive & Negative values
//							Bug fixed on calculation of Percentage of Non Applicative Frame Sent value
//							Add Full Hex Payload in a string
// v1.2		M. Bijasson		Remove useless variable "ConsumptionHminus04".
// v1.1		M. Bijasson		Formatting improvement for EC1 & EC2 in  order to get less lines.
// v1.0		M. Bijasson		First Complete Javascript Code Release.
/////////////////////////////////////////////////////////////////////////////////////////////////

var RFConfiguration = [
  "Config 0",
  "Config 1",
  "Config 2",
  "Config 3",
  "Config 4",
  "LoRaWan",
  "Config 6",
  "Config 7"
];

var TypeOfNetwork = [
  "Public",
  "Private",
  "Hybrid"
];

var TransmissionPower = [
	"20dBm",
	"14dBm",
	"11dBm",
	"8dBm",
	"5dBm",
	"2dBm"
];

var DataRate = [
	"LoRa: SF12 / 125 kHz",
	"LoRa: SF11 / 125 kHz",
	"LoRa: SF10 / 125 kHz",
	"LoRa: SF9 / 125 kHz",
	"LoRa: SF8 / 125 kHz",
	"LoRa: SF7 / 125 kHz",
	"LoRa: SF7 / 250 kHz",
	"FSK/50 kbps"
];

var PulseWeight = [
  1,  1,  1,  1,  1,  10,  1,  10,  100,  1000,  100
];

var Hex2Str = [ 
	"00","01","02","03","04","05","06","07","08","09","0A","0B","0C","0D","0E","0F",
	"10","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","1F",
	"20","21","22","23","24","25","26","27","28","29","2A","2B","2C","2D","2E","2F",
	"30","31","32","33","34","35","36","37","38","39","3A","3B","3C","3D","3E","3F",
	"40","41","42","43","44","45","46","47","48","49","4A","4B","4C","4D","4E","4F",
	"50","51","52","53","54","55","56","57","58","59","5A","5B","5C","5D","5E","5F",
	"60","61","62","63","64","65","66","67","68","69","6A","6B","6C","6D","6E","6F",
	"70","71","72","73","74","75","76","77","78","79","7A","7B","7C","7D","7E","7F",
	"80","81","82","83","84","85","86","87","88","89","8A","8B","8C","8D","8E","8F",
	"90","91","92","93","94","95","96","97","98","99","9A","9B","9C","9D","9E","9F",
	"A0","A1","A2","A3","A4","A5","A6","A7","A8","A9","AA","AB","AC","AD","AE","AF",
	"B0","B1","B2","B3","B4","B5","B6","B7","B8","B9","BA","BB","BC","BD","BE","BF",
	"C0","C1","C2","C3","C4","C5","C6","C7","C8","C9","CA","CB","CC","CD","CE","CF",
	"D0","D1","D2","D3","D4","D5","D6","D7","D8","D9","DA","DB","DC","DD","DE","DF",
	"E0","E1","E2","E3","E4","E5","E6","E7","E8","E9","EA","EB","EC","ED","EE","EF",
	"F0","F1","F2","F3","F4","F5","F6","F7","F8","F9","FA","FB","FC","FD","FE","FF",
];

var EC1 = [
0,1,2,3,4,5,6,7,8,9,10,12,14,16,18,20,22,24,26,28,30,35,40,45,50,55,60,65,70,75,80,85,90,
95,100,105,110,115,120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,195,200,210,
220,230,240,250,260,270,280,290,300,310,320,330,340,350,360,370,380,390,400,420,440,460,
480,500,520,540,560,580,600,620,640,660,680,700,720,740,760,780,800,840,880,920,960,1000,
1040,1080,1120,1160,1200,1240,1280,1320,1360,1400,1440,1480,1520,1560,1600,1680,1760,1840,
1920,2000,2080,2160,2240,2320,2400,2480,2560,2640,2720,2800,2880,2960,3040,3120,3200,3360,
3520,3680,3840,4000,4160,4320,4480,4640,4800,4960,5120,5280,5440,5600,5760,5920,6080,6240,
6400,6720,7040,7360,7680,8000,8320,8640,8960,9280,9600,9920,10240,10560,10880,11200,11520,
11840,12160,12480,12800,13440,14080,14720,15360,16000,16640,17280,17920,18560,19200,19840,
20480,21120,21760,22400,23040,23680,24320,24960,25600,26880,28160,29440,30720,32000,33280,
34560,35840,37120,38400,39680,40960,42240,43520,44800,46080,47360,48640,49920,51200,53760,
56320,58880,61440,64000,66560,69120,71680,74240,76800,79360,81920,84480,87040,89600,92160,
94720,97280,99840,102400,107520,112640,117760,122880,128000,133120,138240,143360,148480,
153600,158720,163840,168960,174080,179200,184320,189440,194560,199680,'Overflow','Anomaly'
];

var EC2 = [
0,0.0025,0.0051,0.005304,0.00551616,0.005736807,0.005966279,0.00620493,0.006453127,0.006711252,
0.006979702,0.00725889,0.007549246,0.007851216,0.008165265,0.008491875,0.00883155,0.009184812,
0.009552204,0.009934293,0.010331665,0.010744931,0.011174728,0.011621717,0.012086586,0.01257005,
0.013072852,0.013595766,0.014139596,0.01470518,0.015293387,0.015905123,0.016541328,0.017202981,
0.0178911,0.018606744,0.019351014,0.020125054,0.020930056,0.021767258,0.022637949,0.023543467,
0.024485205,0.025464614,0.026483198,0.027542526,0.028644227,0.029789996,0.030981596,0.03222086,
0.033509694,0.034850082,0.036244085,0.037693849,0.039201603,0.040769667,0.042400454,0.044096472,
0.04586033,0.047694743,0.049602533,0.051586635,0.0536501,0.055796104,0.058027948,0.060349066,
0.062763029,0.06527355,0.067884492,0.070599871,0.073423866,0.076360821,0.079415254,0.082591864,
0.085895539,0.08933136,0.092904614,0.096620799,0.100485631,0.104505056,0.108685259,0.113032669,
0.117553975,0.122256134,0.12714638,0.132232235,0.137521525,0.143022386,0.148743281,0.154693012,
0.160880732,0.167315962,0.1740086,0.180968944,0.188207702,0.19573601,0.203565451,0.211708069,
0.220176391,0.228983447,0.238142785,0.247668496,0.257575236,0.267878246,0.278593375,0.28973711,
0.301326595,0.313379658,0.325914845,0.338951439,0.352509496,0.366609876,0.381274271,0.396525242,
0.412386251,0.428881701,0.446036969,0.463878448,0.482433586,0.50173093,0.521800167,0.542672173,
0.56437906,0.586954223,0.610432392,0.634849687,0.660243675,0.686653422,0.714119559,0.742684341,
0.772391715,0.803287383,0.835418879,0.868835634,0.903589059,0.939732621,0.977321926,1.016414803,
1.057071395,1.099354251,1.143328421,1.189061558,1.23662402,1.286088981,1.33753254,1.391033842,
1.446675196,1.504542204,1.564723892,1.627312847,1.692405361,1.760101576,1.830505639,1.903725864,
1.979874899,2.059069895,2.14143269,2.227089998,2.316173598,2.408820542,2.505173363,2.605380298,
2.70959551,2.81797933,2.930698504,3.047926444,3.169843501,3.296637241,3.428502731,3.56564284,
3.708268554,3.856599296,4.010863268,4.171297798,4.33814971,4.511675699,4.692142727,4.879828436,
5.075021573,5.278022436,5.489143334,5.708709067,5.937057429,6.174539727,6.421521316,6.678382168,
6.945517455,7.223338153,7.512271679,7.812762547,8.125273048,8.45028397,8.788295329,9.139827142,
9.505420228,9.885637038,10.28106252,10.69230502,11.11999722,11.56479711,12.027389,12.50848456,
13.00882394,13.52917689,14.07034397,14.63315773,15.21848404,15.8272234,16.46031233,17.11872483,
17.80347382,18.51561277,19.25623728,20.02648678,20.82754625,2,1.66064809,22.52707402,23.42815698,
24.36528326,25.33989459,26.35349038,27.40762999,28.50393519,29.6440926,30.8298563,32.06305055,
33.34557258,34.67939548,36.0665713,37.50923415,39.00960351,40.56998766,42.19278716,43.88049865,
45.63571859,47.46114734,49.19587904,100,-0.25,-0.75,-1.5,-2.5,-3.5,-4.5,-5.5,-7.5,-10.5,-13.5,
-17.5,-22.5,-27.5,-32.5,-37.5,-42.5,-47.5,-100
];

var decoded = {};

// Hex to Signed Int conversion for a DWORD (32bits)
function Hex2SignedDWord(hex) {
    if (hex.length % 2 != 0) {
        hex = "0" + hex;
    }
    var num = parseInt(hex, 16);
    var maxVal = Math.pow(2, 32);
    if (num > maxVal / 2 - 1) {
        num = num - maxVal
    }
    return num;
}

// Macro Alarms decoding
function MacroAlarmInterpretation(tmp){
      decoded.MacroAlarme_InProgressAlarms = tmp & 0x01;
      decoded.MacroAlarme_Metrology = (tmp >> 1) & 0x01;
      decoded.MacroAlarme_System = (tmp >> 2) & 0x01;
      decoded.MacroAlarme_Tamper = (tmp >> 3) & 0x01;
      if ((tmp&0x60)==0x20) decoded.MacroAlarme_PastPersistenceDuringThePeriod = 1; else decoded.MacroAlarme_PastPersistenceDuringThePeriod = 0;
      if ((tmp&0x60)==0x40) decoded.MacroAlarme_InProgressPersistence = 1; else decoded.MacroAlarme_InProgressPersistence = 0;
      if ((tmp&0x60)==0x60) decoded.MacroAlarme_InProgressImpactingPersistence = 1; else decoded.MacroAlarme_InProgressImpactingPersistence = 0;
      decoded.MacroAlarme_StopsLeaks = (tmp >> 7) & 0x01;
}

// Micro Alarms decoding
function MicroAlarmInterpretation(tmp1,tmp2,tmp3,tmp4,tmp5){
    decoded.MicroAlarme_Metrology_BlockedMeter = tmp1 & 0x01;
	decoded.MicroAlarme_Metrology_OverFlowSmallSize = (tmp1 >> 6) & 0x01;
	decoded.MicroAlarme_Metrology_OverFlowLargeSize = (tmp1 >> 7) & 0x01;
	decoded.MicroAlarme_System_Battery = (tmp2 >> 7) & 0x01;
	decoded.MicroAlarme_System_ClockUpdated = tmp3 & 0x01;
	decoded.MicroAlarme_System_ModuleReconfigured = (tmp3 >> 3) & 0x01;
	decoded.MicroAlarme_System_NoiseDefense = (tmp3 >> 6) & 0x01;
	decoded.MicroAlarme_System_LowTemperature = tmp4 & 0x01;
	decoded.MicroAlarme_System_NumberOfAlarmCycleAuthorizedReached = (tmp4 >> 1) & 0x01;
	decoded.MicroAlarme_Tamper_ReversedMeter  = (tmp4 >> 7) & 0x01;
	decoded.MicroAlarme_Tamper_Module_tampered = (tmp4 >> 5) & 0x01;
    decoded.MicroAlarme_Tamper_AcquisitionStageFailure = (tmp4 >> 6) & 0x01;
	decoded.MicroAlarme_WaterQuality_Backflow = tmp5 & 0x01;
}

function Decoder(bytes, port) {
  
  // Frame Type
  decoded.FrameType = bytes[0] & 0x0F;
  // Comuting depending of Frame Type
  switch(decoded.FrameType)
  {
	// Frame Type DS51_OE : On Event
    case 0 : 
	  decoded.MeterKey = bytes[0] >> 4;
      decoded.PulseWeight = PulseWeight[decoded.MeterKey-1];
	  decoded.SequenceInCalendar = bytes[0] >> 4;
      decoded.AlarmsCauses_Tamper = (bytes[2] >> 2) & 0x01;
	  decoded.AlarmsCauses_Backflow = (bytes[2] >> 3) & 0x01;
	  decoded.AlarmsCauses_FlowPersistenceInProgress = (bytes[2] >> 4) & 0x01;
      decoded.AlarmsCauses_StopPersistenceInProgress = (bytes[2] >> 5) & 0x01;
	  decoded.MicroAlarme_Metrology_BlockedMeter = bytes[3] & 0x01;
	  decoded.MicroAlarme_Metrology_OverFlowSmallSize = (bytes[3] >> 6) & 0x01;
	  decoded.MicroAlarme_Metrology_OverFlowLargeSize = (bytes[3] >> 7) & 0x01;
	  decoded.MicroAlarme_System_Battery = (bytes[4] >> 7) & 0x01;
	  decoded.MicroAlarme_System_ClockUpdated = bytes[5] & 0x01;
	  decoded.MicroAlarme_System_ModuleReconfigured = (bytes[5] >> 3) & 0x01;
	  decoded.MicroAlarme_System_NoiseDefense = (bytes[5] >> 6) & 0x01;
	  decoded.MicroAlarme_System_LowTemperature = bytes[6] & 0x01;
	  decoded.MicroAlarme_System_NumberOfAlarmCycleAuthorizedReached = (bytes[6] >> 1) & 0x01;
	  decoded.MicroAlarme_Tamper_ReversedMeter  = (bytes[6] >> 7) & 0x01;
	  decoded.MicroAlarme_Tamper_Module_tampered = (bytes[6] >> 5) & 0x01;
	  decoded.MicroAlarme_Tamper_AcquisitionStageFailure = (bytes[6] >> 6) & 0x01;
	  decoded.MicroAlarme_WaterQuality_Backflow = bytes[7] & 0x01;
      decoded.NonZeroMinFlow = EC1[bytes[8]];
	  decoded.MaxFlow = EC1[bytes[10]];
	  decoded.Backflow_NumberOfAlternation = EC1[bytes[12]];
	  decoded.Backflow_CumulatedVolume = EC1[bytes[13]];
	  decoded.Flow_DurationOfPersistenceFlowEqualToZero = bytes[19] & 0x0F;
	  decoded.Flow_DurationOfPersistenceFlowOverZero = bytes[20] >> 4;
	  decoded.DS51_OE_FrameRepetitionNumber = bytes[31] & 0x03;
	  decoded.NumberOfSecondsSince01January2012AtMidnight = bytes[32] + 256*bytes[33]+ 256*256*bytes[34]+ 256*256*256*bytes[35];
	  decoded.LoRaWanStatistics_RadioSerialNumber = "5322."+Hex2Str[bytes[38]]+"."+Hex2Str[bytes[39]]+"."+Hex2Str[bytes[40]]+"."+Hex2Str[bytes[41]]+"."+Hex2Str[bytes[42]]+"."+Hex2Str[bytes[43]]; 
      decoded.MeterKey = bytes[44] & 0x0F;
	  break;

    // Frame Type DS51_A : E17Z Periodical Frame
    case 10 : 
	  decoded.E17Z_PeriodicalFrame_SequenceNumber = bytes[0] >> 4; // Sequence number of the periodical frame
      MacroAlarmInterpretation(bytes[2]);
	  MicroAlarmInterpretation(bytes[3],bytes[4],bytes[5],bytes[6],bytes[7]);
	  decoded.Index0h00 = Hex2SignedDWord((bytes[8]+256*bytes[9]+256*256*bytes[10]+256*256*256*bytes[11]).toString(16)); // Midnight Index in pulses
	  decoded.DateTime_TransmissionTimeStamp = (bytes[50]>>3) + "h" + (((bytes[50]&0x07)<<3) + (bytes[49]>>5)) + "mn"; //Hour & Minutes of frame transmission
	  decoded.MeterKey = bytes[50]&0x0F;
  
      decoded.ForwardFlow_Last24Hours_Sum = bytes[12]+256*bytes[13]+256*256*(bytes[14]&0x0F)	// Fowardflow volume during the last 24 hours in pulses
	  decoded.BackFlow_Last24Hours_Sum = bytes[15]+256*bytes[16]+256*256*(bytes[14]>>4)			// Backflow volume during the last 24 hours in pulses
  
      // Decode the hourly consumption in percentage (First element = h-24) and compute the hourly consumption in pulses
      decoded.ConsumptionPercentage = [];	
      decoded.ConsumptionPulses = [];	
      TmpNumberOfPositiveValues = 0;
      TmpNumberOfNegativeValues = 0;
      TmpPositionOfMaxPositiveValues = -1;
      TmpPositionOfMaxNegativeValues = -1;
      TmpValueOfMaxPositiveValuesInPercentage = 0;
      TmpValueOfMaxNegativeValuesInPercentage = 0;
  
      // 1st loop in the array to get min value, max value, positions in the array  of min & max values.
	  for(i=0;i<24;i++)
	  {
		  decoded.ConsumptionPercentage[i] = EC2[bytes[i+17]];
		  if (decoded.ConsumptionPercentage[i] == 0) decoded.ConsumptionPulses[i] = 0;
		  if (decoded.ConsumptionPercentage[i] > 0)	// Only if positive values
		  {
			  decoded.ConsumptionPulses[i] = Math.round(decoded.ConsumptionPercentage[i]*decoded.ForwardFlow_Last24Hours_Sum/100);	// Compute the pulses 
			  TmpNumberOfPositiveValues++; // count the number of positive % values
			  if (decoded.ConsumptionPercentage[i] > TmpValueOfMaxPositiveValuesInPercentage) 
			  {
				  TmpValueOfMaxPositiveValuesInPercentage = decoded.ConsumptionPercentage[i];	// store the maximum value
				  TmpPositionOfMaxPositiveValues = i;	// store the position in the array of the maximum value
			  }
		  }
		  if (decoded.ConsumptionPercentage[i] < 0) 
		  {
			  decoded.ConsumptionPulses[i] = Math.round(decoded.ConsumptionPercentage[i]*decoded.BackFlow_Last24Hours_Sum/100);	// Compute the pulses 
			  TmpNumberOfNegativeValues++; // count the number of negative % values
			  if (decoded.ConsumptionPercentage[i] < TmpValueOfMaxNegativeValuesInPercentage) 
			  {
				  TmpValueOfMaxNegativeValuesInPercentage = decoded.ConsumptionPercentage[i]; // store the minimum value
				  TmpPositionOfMaxNegativeValues = i;// store the position in the array of the minimum value
			  }
		  }
	  }
	  // 2nd loop in the array to compute each maximum values
	  TmpSumOfPositiveValuesInPercentage = 0;
	  TmpSumOfNegativeValuesInPercentage = 0;
	  TmpSumOfPositiveValuesInPulses = 0;
	  TmpSumOfNegativeValuesInPulses = 0;
	  for(i=0;i<24;i++)
	  {
		  if (decoded.ConsumptionPercentage[i] > 0)	// Only if positive values
		  { 
			if ((TmpPositionOfMaxPositiveValues > -1) && (TmpPositionOfMaxPositiveValues != i))
			
			  {
				  TmpSumOfPositiveValuesInPercentage = TmpSumOfPositiveValuesInPercentage + decoded.ConsumptionPercentage[i];
				  TmpSumOfPositiveValuesInPulses = TmpSumOfPositiveValuesInPulses + decoded.ConsumptionPulses[i];
			  }
		  }
		  
		  if (decoded.ConsumptionPercentage[i] < 0)	// Only if negative values
		  { 
			if ((TmpPositionOfMaxNegativeValues > -1) && (TmpPositionOfMaxNegativeValues != i))
			
			  {
				  TmpSumOfNegativeValuesInPercentage = TmpSumOfNegativeValuesInPercentage + decoded.ConsumptionPercentage[i];
				  TmpSumOfNegativeValuesInPulses = TmpSumOfNegativeValuesInPulses + decoded.ConsumptionPulses[i];
			  }
		  }
		  
	  }
	  if (TmpPositionOfMaxPositiveValues > -1) decoded.ConsumptionPercentage[TmpPositionOfMaxPositiveValues] = 100 - TmpSumOfPositiveValuesInPercentage // Update Maximum Value by the re-computed one
	  if (TmpPositionOfMaxNegativeValues > -1) decoded.ConsumptionPercentage[TmpPositionOfMaxNegativeValues] = -100 - TmpSumOfNegativeValuesInPercentage // Update Minimum Value by the re-computed one
	  if (TmpPositionOfMaxPositiveValues > -1) decoded.ConsumptionPulses[TmpPositionOfMaxPositiveValues] = decoded.ForwardFlow_Last24Hours_Sum - TmpSumOfPositiveValuesInPulses // Update Maximum Value by the re-computed one
	  if (TmpPositionOfMaxNegativeValues > -1) decoded.ConsumptionPulses[TmpPositionOfMaxNegativeValues] = -decoded.BackFlow_Last24Hours_Sum - TmpSumOfNegativeValuesInPulses // Update Minimum Value by the re-computed one	
	  break;
    
  // Frame Type DS51_2 : E17Z Monthly Frame
    case 11 : 
	  decoded.E17Z_PeriodicalFrame_SequenceNumber = bytes[0] >> 4; // Sequence number of the periodical frame
	  decoded.MeterKey = bytes[2] >> 4;
      decoded.PulseWeight = PulseWeight[decoded.MeterKey-1];
	  decoded.Configuration_IndexOffsetConfiguredDuringTheInstallation = (bytes[2] >> 1) & 0x01;
	  decoded.Configuration_SummerWinterTimeManagementEnabled = bytes[3] & 0x01;
	  decoded.Configuration_DS51_1x_AND_DS51_OE_Enabled = bytes[4] & 0x01;
	  decoded.Configuration_DS51_5_Enabled = (bytes[4] >> 1) & 0x01;
	  decoded.Configuration_WBDB_Enabled = (bytes[4] >> 3) & 0x01;
	  decoded.Configuration_LoRaWANProtocol_Enabled = (bytes[4] >> 4) & 0x01;
	  if (((bytes[4] >> 5) & 0x01) == 0x01) decoded.Configuration_ConnectionMethode = "ABP"; else decoded.Configuration_ConnectionMethode = "OTAA";
	  decoded.Configuration_TypeOfNetwork = TypeOfNetwork[((bytes[4] & 0xC0) >> 6)];
	  decoded.Configuration_ADR_Enabled = bytes[5] & 0x01;
  	  decoded.Configuration_LossSessionManagement_Enabled = (bytes[5] >> 1) & 0x01;
      decoded.EnergyConsumptionInPercentage = bytes[14]*0.4 + "%"// Power consumption in %
	  decoded.MaxFlow = EC1[bytes[32]];
	  decoded.LoRaWanStatistics_TransmissionPower = TransmissionPower[((bytes[36] & 0xF0) >> 4)];
	  decoded.LoRaWanStatistics_DataRate = DataRate[(bytes[36] & 0x0F)];
	  decoded.LoRaWanStatistics_CounterOfTransmittedFrames = bytes[37]*16 + (bytes[38]>>4);
	  decoded.LoRaWanStatistics_CounterOfReceivedFrames = EC1[(bytes[38] & 0x0F)*16 + (bytes[39]>>4)];
	  decoded.LoRaWanStatistics_NumberOfConfigurationChangesDuringLastMonth = bytes[39] & 0x0F;
	  decoded.LoRaWanStatistics_NetworkSettingForBandwithOccupation = bytes[40] >> 4;
	  decoded.LoRaWanStatistics_NetworkSettingForNumberOfFrameRepetition = bytes[40] & 0x0F;
	  decoded.LoRaWanStatistics_PercentageOfNonApplicativeFrameSent = (0.4*bytes[41]*decoded.LoRaWanStatistics_CounterOfTransmittedFrames)/100 + "%";
	  decoded.LoRaWanStatistics_NumberOfActiveChannels = bytes[42] >> 3;
	  decoded.LoRaWanStatistics_Channel1Activated = bytes[42] & 0x01;
	  decoded.LoRaWanStatistics_Channel2Activated = bytes[42] & 0x02;
	  decoded.LoRaWanStatistics_Channel3Activated = bytes[42] & 0x04;
	  decoded.LoRaWanStatistics_TotalTimeSpentWithRadioReceiver = (bytes[44] & 0x3F)*256 + bytes[43];
	  decoded.LoRaWanStatistics_RadioSerialNumber = "5322."+Hex2Str[bytes[45]]+"."+Hex2Str[bytes[46]]+"."+Hex2Str[bytes[47]]+"."+Hex2Str[bytes[48]]+"."+Hex2Str[bytes[49]]+"."+Hex2Str[bytes[50]]; 
	  break;
  }
  
  // Display Payload in a string
  var Payload = "ca5189000000000000000000000000000001000024100000000000000000000000000000000000000000000000000000000000";
  for (i=0;i<bytes.length;i++)
  {
       Payload = Payload + bytes[i].toString(16);
  }
  decoded.Payload = Payload; // Full Payload in a string
  
  return decoded;
}

created 3 years ago

Javascript Online Compiler

Write, Run & Share Javascript code online using OneCompiler's JS online compiler for free. It's one of the robust, feature-rich online compilers for Javascript language. Getting started with the OneCompiler's Javascript editor is easy and fast. The editor shows sample boilerplate code when you choose language as Javascript and start coding.

About Javascript

Javascript(JS) is a object-oriented programming language which adhere to ECMA Script Standards. Javascript is required to design the behaviour of the web pages.

Key Features

Open-source
Just-in-time compiled language
Embedded along with HTML and makes web pages alive
Originally named as LiveScript.
Executable in both browser and server which has Javascript engines like V8(chrome), SpiderMonkey(Firefox) etc.

Syntax help

STDIN Example

var readline = require('readline');
var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  terminal: false
});

rl.on('line', function(line){
    console.log("Hello, " + line);
});

variable declaration

Keyword	Description	Scope
var	Var is used to declare variables(old way of declaring variables)	Function or global scope
let	let is also used to declare variables(new way)	Global or block Scope
const	const is used to declare const values. Once the value is assigned, it can not be modified	Global or block Scope

Backtick Strings

Interpolation

let greetings = `Hello ${name}`

Multi line Strings

const msg = `
hello
world!
`

Arrays

An array is a collection of items or values.

Syntax:

let arrayName = [value1, value2,..etc];
// or
let arrayName = new Array("value1","value2",..etc);

Example:

let mobiles = ["iPhone", "Samsung", "Pixel"];

// accessing an array
console.log(mobiles[0]);

// changing an array element
mobiles[3] = "Nokia";

Arrow functions

Arrow Functions helps developers to write code in concise way, it’s introduced in ES6.
Arrow functions can be written in multiple ways. Below are couple of ways to use arrow function but it can be written in many other ways as well.

Syntax:

() => expression

Example:

const numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
const squaresOfEvenNumbers = numbers.filter(ele => ele % 2 == 0)
                                    .map(ele => ele ** 2);
console.log(squaresOfEvenNumbers);

De-structuring

Arrays

let [firstName, lastName] = ['Foo', 'Bar']

Objects

let {firstName, lastName} = {
  firstName: 'Foo',
  lastName: 'Bar'
}

rest(...) operator

 const {
    title,
    firstName,
    lastName,
    ...rest
  } = record;

Spread(...) operator

//Object spread
const post = {
  ...options,
  type: "new"
}
//array spread
const users = [
  ...adminUsers,
  ...normalUsers
]

Functions

function greetings({ name = 'Foo' } = {}) { //Defaulting name to Foo
  console.log(`Hello ${name}!`);
}
 
greet() // Hello Foo
greet({ name: 'Bar' }) // Hi Bar

Loops

1. If:

IF is used to execute a block of code based on a condition.

Syntax

if(condition){
    // code
}

2. If-Else:

Else part is used to execute the block of code when the condition fails.

Syntax

if(condition){
    // code
} else {
    // code
}

3. Switch:

Switch is used to replace nested If-Else statements.

Syntax

switch(condition){
    case 'value1' :
        //code
        [break;]
    case 'value2' :
        //code
        [break;]
    .......
    default :
        //code
        [break;]
}

4. For

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
//code  
}

5. While

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
  // code 
}

6. Do-While

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
  // code 
} while (condition);

Classes

ES6 introduced classes along with OOPS concepts in JS. Class is similar to a function which you can think like kind of template which will get called when ever you initialize class.

Syntax:

class className {
  constructor() { ... } //Mandatory Class method
  method1() { ... }
  method2() { ... }
  ...
}

Example:

class Mobile {
  constructor(model) {
    this.name = model;
  }
}

mbl = new Mobile("iPhone");