/*function Decoder(bytes, port) {
// Decode an uplink message from a buffer
// (array) of bytes to an object of fields.
var value=bytes[0]<<16 | bytes[1]<<8 | bytes[2];
if(bytes[0] & 0x80)
{
value |=0xFFFFFF000000;
}
var latitude=value/10000;//gps latitude,units: °
value=bytes[3]<<16 | bytes[4]<<8 | bytes[5];
if(bytes[3] & 0x80)
{
value |=0xFFFFFF000000;
}
var longitude=value/10000;//gps longitude,units: °
var alarm=(bytes[6] & 0x40)?"TRUE":"FALSE";//Alarm status
value=((bytes[6] & 0x3f) <<8) | bytes[7];
var batV=value/1000;//Battery,units:V
value=bytes[8]<<8 | bytes[9];
if(bytes[8] & 0x80)
{
value |=0xFFFF0000;
}
var roll=value/100;//roll,units: °
value=bytes[10]<<8 | bytes[11];
if(bytes[10] & 0x80)
{
value |=0xFFFF0000;
}
var pitch=value/100; //pitch,units: °
return {
Latitude: latitude,
Longitud: longitude,
Roll: roll,
Pitch:pitch,
BatV:batV,
ALARM_status:alarm,
};
}*/
//The function is :
function Decoder(bytes, port) {
// Decode an uplink message from a buffer
// (array) of bytes to an object of fields.

var latitude=0;//gps latitude,units: °
if(bytes[0] !== 0)
{
  latitude=(bytes[0]<<24 | bytes[1]<<16 | bytes[2]<<8 | bytes[3])/1000000;//gps latitude,units: °
}
else
{
  latitude=0;//gps latitude,units: °
}

var longitude = 0;
if(bytes[4] !== 0)
{
  longitude=(bytes[4]<<24 | bytes[5]<<16 | bytes[6]<<8 | bytes[7])/1000000;//gps longitude,units: °
}
else
{
 longitude=0;//gps longitude,units: °
}

var alarm=(bytes[8] & 0x40)?"TRUE":"FALSE";//Alarm status


var batV=(((bytes[8] & 0x3f) <<8) | bytes[9])/1000;//Battery,units:V

if(bytes[10] & 0xC0==0x40)
{
  var motion_mode="Move";
}
else if(bytes[10] & 0xC0 ==0x80)
{
  motion_mode="Collide";
}
else if(bytes[10] & 0xC0 ==0xC0)
{
  motion_mode="User";
}
else
{
  motion_mode="Disable";
}                                            //mode of motion

var led_updown=(bytes[10] & 0x20)?"ON":"OFF";//LED status for position,uplink and downlink

var Firmware = 160+(bytes[10] & 0x1f);  // Firmware version; 5 bits 


var roll=(bytes[11]<<8 | bytes[12])/100;//roll,units: °


var pitch=(bytes[13]<<8 | bytes[14])/100; //pitch,units: °

var hdop = 0;
if(bytes[15] > 0)
{
   hdop =bytes[15]/100; //hdop,units: °
}
else
{
   hdop =bytes[15];
}

var altitude =(bytes[16]<<8 | bytes[17]) / 100; //Altitude,units: °

return {
Latitude: latitude,
Longitud: longitude,
Roll: roll,
Pitch:pitch,
BatV:batV,
ALARM_status:alarm,
MD:motion_mode,
LON:led_updown,
FW:Firmware,
HDOP:hdop,
Altitude:altitude,
};
}