function decodeUplink(input) {
        return { 
            data: Decode(input.fPort, input.bytes, input.variables)
        };   
}
function datalog(i,bytes){
  var aa= (bytes[2+i]<<8 | bytes[3+i])/10;
  var bb= bytes[4+i]<<8 | bytes[5+i];
  var cc= bytes[6+i]<<24>>24;    
  var dd= (bytes[0+i]&0x02) ? "High":"Low";
  var ee= (bytes[0+i]&0x01) ? "True":"False"; 
  var ff= getMyDate((bytes[7+i]<<24 | bytes[8+i]<<16 | bytes[9+i]<<8 | bytes[10+i]).toString(10));
  var string='['+aa+','+bb+','+cc+','+dd+','+ee+','+ff+']'+',';  
  
  return string;
}

function getzf(c_num){ 
  if(parseInt(c_num) < 10)
    c_num = '0' + c_num; 

  return c_num; 
}

function getMyDate(str){ 
  var c_Date;
  if(str > 9999999999)
    c_Date = new Date(parseInt(str));
  else 
    c_Date = new Date(parseInt(str) * 1000);
  
  var c_Year = c_Date.getFullYear(), 
  c_Month = c_Date.getMonth()+1, 
  c_Day = c_Date.getDate(),
  c_Hour = c_Date.getHours(), 
  c_Min = c_Date.getMinutes(), 
  c_Sen = c_Date.getSeconds();
  var c_Time = c_Year +'-'+ getzf(c_Month) +'-'+ getzf(c_Day) +' '+ getzf(c_Hour) +':'+ getzf(c_Min) +':'+getzf(c_Sen); 
  
  return c_Time;
}

function Decode(fPort, bytes, variables) {
  if(fPort==0x02)
  {
    var value=(bytes[0]<<8 | bytes[1]) & 0x3FFF;
    var batV=value/1000;//Battery,units:V
  
    value=(bytes[2]<<24>>16) | bytes[3];
    var temp_DS18B20=parseFloat((value/10).toFixed(1));
     
    value=bytes[4]<<8 | bytes[5];
    var Distance_cm=(value/10);  
    
    value=bytes[6]<<8 | bytes[7];
    var Distance_signal_strength=value; 
  
    value=bytes[9]<<24>>24;
    var Lidar_temp=value; 
   
    var i_flag=(bytes[8] & 0x01)? "TRUE":"FALSE";
    var i_level=(bytes[8] & 0x02)? "HIGH":"LOW";

    var mes_type=bytes[10];
   
    if(bytes.length==11)
    {
     return {
	          Node_type:"LDS40-LB",
              Bat:batV,
              TempC_DS18B20:temp_DS18B20,
              Lidar_distance:Distance_cm,
              Lidar_signal:Distance_signal_strength,
              Lidar_temp:Lidar_temp,
              Interrupt_flag:i_flag,
	      Interrupt_level:i_level,
              Message_type:mes_type
            };       
    }
  }
  else if(fPort==0x03)  
  {
    var pnack= ((bytes[0]>>7)&0x01) ? "True":"False";
    for(var i=0;i<bytes.length;i=i+11)
    {
      var data= datalog(i,bytes);
      if(i=='0')
        data_sum=data;
      else
        data_sum+=data;
    }
    return{
	Node_type:"LDS40-LB",
    DATALOG:data_sum,
    PNACKMD:pnack,
    };    
  }  
  else if(fPort==0x05)
  {
  	var freq_band;
  	var sub_band;
    var sensor;
    
    if(bytes[0]==0x24)
      sensor= "LDS12-LB";
      
	  var firm_ver= (bytes[1]&0x0f)+'.'+(bytes[2]>>4&0x0f)+'.'+(bytes[2]&0x0f);
	  
    if(bytes[3]==0x01)
        freq_band="EU868";
  	else if(bytes[3]==0x02)
        freq_band="US915";
  	else if(bytes[3]==0x03)
        freq_band="IN865";
  	else if(bytes[3]==0x04)
        freq_band="AU915";
  	else if(bytes[3]==0x05)
        freq_band="KZ865";
  	else if(bytes[3]==0x06)
        freq_band="RU864";
  	else if(bytes[3]==0x07)
        freq_band="AS923";
  	else if(bytes[3]==0x08)
        freq_band="AS923_1";
  	else if(bytes[3]==0x09)
        freq_band="AS923_2";
  	else if(bytes[3]==0x0A)
        freq_band="AS923_3";
  	else if(bytes[3]==0x0F)
        freq_band="AS923_4";
  	else if(bytes[3]==0x0B)
        freq_band="CN470";
  	else if(bytes[3]==0x0C)
        freq_band="EU433";
  	else if(bytes[3]==0x0D)
        freq_band="KR920";
  	else if(bytes[3]==0x0E)
        freq_band="MA869";
  	
    if(bytes[4]==0xff)
      sub_band="NULL";
	  else
      sub_band=bytes[4];

    var bat= (bytes[5]<<8 | bytes[6])/1000;
    
  	return {
  	  SENSOR_MODEL:sensor,
      FIRMWARE_VERSION:firm_ver,
      FREQUENCY_BAND:freq_band,
      SUB_BAND:sub_band,
      BAT:bat,
  	}
  }  
}
