Introduction

This article shows how to use ibeacon for location.

Location service configuration

The location service is currently installed on the 120.78.138.177 server, the code is in /root/location, and the pre-read configuration file for running location directly is /etc/location_conf.json

Configuration file： location_conf.json

{ "location_conf": {

   "loctype": "indoor",       / / indoor/outdoor
   "locmap": "mapwize"    //   Map interface: mapwize， traccar

}, "mqtt_conf": {

    "servaddr": "[str]",    //     Lorawan server address: Refer to TTN app handler：eu.thethings.network
    "servport": [int],       //   Lorawan server port: 1883
   "clientid": "[str]",       //   MQTT client identity: Custom
   "qos":[int],                 //  （Optional） MQTT service quality: 0
   "username":"[str]",     //   Agent name of mqtt: application ID of TTN
    "password":"[str]",      //  The proxy password of mqtt: application access key of TTN
   "topic":"[str]",              // The topic of mqtt subscription: TTN is + / devices / + / up  
   "connection":"[str]" },   //（Optional） mqtt is a string used for direct connection, composed of serveraddr and port 
"mapwize_conf":{          //Map settings
    "apikey": "[str]",        // The apikey of the map user can be found on the Api keys page of wapwize, and read and write permissions need to be set
   "venueid":"[str]",        // （Optional）Indoor map area identification 
    "orgid":"[str]",           //  The identity of the user organizer
   "universesid":"[str]",   //The range indicator of the indoor map, find it on the universes page
   "placetype": "[str]"     //The type of place used to identify the creation must be created on the placetypes page in the map, where the placetype name is filled in
    },
"loracloud":{
   "token":  "[str]"          //The password string of loracloud location service, the outdoor map must fill in the account token of loracloud

}

"rssi_conf": {
   "rssirate": [int],          // （Optional） A basis for rssi calculation distance, the rssi value (absolute value) when the beacon is 1 meter apart   
   "rssidiv": [float] }        // （Optional） rssi measures an attenuation value of distance. As the distance to the beacon is farther, the value changes speed

}

TTN map decoder

function Decoder(bytes, port) {

// Decode an uplink message from a buffer

// (array) of bytes to an object of fields.

value = bytes[0] << 8 | bytes[1];

var batV = value/1000;//Battery,units:V

var mode = bytes[5];

//var value=(bytes[3]-0x30)*1000 +(bytes[5]-0x30)*100 + (bytes[5]-0x30)*10 +(bytes[6]-0x30);

//var value = bytes.slice(3);

var i;

var con;

var str = "";

var major = 1;

var minor = 1;

var rssi = 0;

var addr = "";

if(mode ==2 ) {

for(i = 38 ; i<50 ; i++) {

con = bytes[i].toString();

str += String.fromCharCode(con);

}

addr = str;

str = "";

for(i = 6 ; i<38 ; i++) {

con = bytes[i].toString();

str += String.fromCharCode(con);

}

value = str;

}

if(mode == 3 ) {

str = "";

for(i = 18 ; i < 22 ; i++) {

con = bytes[i].toString();

str += String.fromCharCode(con);

}

major = parseInt(str, 16);

str = "";

for(i = 22 ; i < 26 ; i++) {

con = bytes[i].toString();

str += String.fromCharCode(con);

}

minor = parseInt(str, 16);

str = "";

for(i = 28 ; i < 32 ; i++) {

con = bytes[i].toString();

str += String.fromCharCode(con);

}

rssi = parseInt(str);

str = "";

for(i = 6 ; i < 18 ; i++) {

con = bytes[i].toString();

str += String.fromCharCode(con); }

value = str; }

if(mode == 1) {

for(i = 6 ; i<11 ; i++) {

con = bytes[i].toString();

str += String.fromCharCode(con);

}

value = str; }

var uuid = value;

var alarm = bytes[2] >> 4 & 0x0F;

var step_count = (bytes[2] & 0x0F) << 16 | bytes[3] << 8 | bytes[4];

return {

UUID: uuid,

ADDR: addr,

MAJOR: major,

MINOR: minor,

RSSI:rssi,

STEP: step_count,

ALARM: alarm,

BatV:batV,

};

}