Dragino TTN Decoders

LGT92-v1.6.4_decoder_TTN_ecite.js

// From: https://www.dragino.com/downloads/index.php?dir=LGT_92/Decoder/
// But roll, pitch and altitude are wrong due to <<24>>16.
// Better: <<8

//The function is :
function Decoder(bytes, port) {
	// Decode an uplink message from a buffer
	// (array) of bytes to an object of fields.

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

	var longitude;
	  longitude=(bytes[4]<<24 | bytes[5]<<16 | bytes[6]<<8 | bytes[7])/1000000;//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,
	Longitude: longitude,
	Roll: roll,
	Pitch:pitch,
	BatV:batV,
	ALARM_status:alarm,
	MD:motion_mode,
	LON:led_updown,
	FW:Firmware,
	HDOP:hdop,
	Altitude:altitude,
	};
}

ttnv2_payload_decode_v1.8_ecite.js

// From: https://www.dragino.com/downloads/index.php?dir=LHT65/payload_decode/
// Additional: Decode battery status in function bat_status_decode

function str_pad(byte){
    var zero = '00';
    var hex= byte.toString(16);    
    var tmp  = 2-hex.length;
    return zero.substr(0,tmp) + hex + " ";
}

function bat_status_decode(byte){
	if(byte === 0){
		return "Ultra Low";
	}
	else if(byte == 1){
		return "Low";
	}
	else if(byte == 2){
		return "OK";
	}
	else if(byte == 3){
		return "Good";
	}
	else {
		return "Unknown";
	}
}

function Decoder(bytes, port) {
var Ext= bytes[6]&0x0F;
var poll_message_status=(bytes[6]&0x40)>>6;
var Connect=(bytes[6]&0x80)>>7;
var decode = {};

if(Ext==0x09)
{
  decode.TempC_DS=parseFloat(((bytes[0]<<24>>16 | bytes[1])/100).toFixed(2));
  decode.Bat_status=bat_status_decode(bytes[4]>>6);
}
else
{
  decode.BatV= ((bytes[0]<<8 | bytes[1]) & 0x3FFF)/1000;
  decode.Bat_status=bat_status_decode(bytes[0]>>6);
}

if(Ext!=0x0f)
{
  decode.TempC_SHT=parseFloat(((bytes[2]<<24>>16 | bytes[3])/100).toFixed(2));
  decode.Hum_SHT=parseFloat((((bytes[4]<<8 | bytes[5])&0xFFF)/10).toFixed(1));
}
if(Connect=='1')
{
  decode.No_connect="Sensor no connection";
}

if(Ext=='0')
{
  decode.Ext_sensor ="No external sensor";
}
else if(Ext=='1')
{
  decode.Ext_sensor ="Temperature Sensor";
  decode.TempC_DS=parseFloat(((bytes[7]<<24>>16 | bytes[8])/100).toFixed(2));
}
else if(Ext=='4')
{
  decode.Work_mode="Interrupt Sensor send";
  decode.Exti_pin_level=bytes[7] ? "High":"Low";  
  decode.Exti_status=bytes[8] ? "True":"False";
}
else if(Ext=='5')
{
  decode.Work_mode="Illumination Sensor";
  decode.ILL_lx=bytes[7]<<8 | bytes[8];
  
}
else if(Ext=='6')
{
  decode.Work_mode="ADC Sensor";
  decode.ADC_V=(bytes[7]<<8 | bytes[8])/1000;
}
else if(Ext=='7')
{
  decode.Work_mode="Interrupt Sensor count";
  decode.Exit_count=bytes[7]<<8 | bytes[8];
}
else if(Ext=='8')
{
  decode.Work_mode="Interrupt Sensor count";
  decode.Exit_count=bytes[7]<<24 | bytes[8]<<16 | bytes[9]<<8 | bytes[10];
}
else if(Ext=='9')
{
  decode.Work_mode="DS18B20 & timestamp";
  decode.Systimestamp=(bytes[7]<<24 | bytes[8]<<16 | bytes[9]<<8 | bytes[10] );
}
else if(Ext=='15')
{
  decode.Work_mode="DS18B20ID";
  decode.ID=str_pad(bytes[2])+str_pad(bytes[3])+str_pad(bytes[4])+str_pad(bytes[5])+str_pad(bytes[7])+str_pad(bytes[8])+str_pad(bytes[9])+str_pad(bytes[10]);
}

if(poll_message_status===0)
{
  if(bytes.length==11)
  {
    return decode;
  }
}

}