octopus-gps-tracking/lib/adapters/tk103-2.js

Let you work with some GPS trackers that connects through tcp.

/* */
f = require("../functions");
var nmea = require("nmea-0183");

exports.protocol="GPS103";
exports.model_name="TK103-2";
exports.compatible_hardware=["TK103-2/supplier"];

var adapter = function(device){
  if(!(this instanceof adapter)) return new adapter(device);

  this.device = device;

  /*******************************************
   PARSE THE INCOMING STRING FROM THE DECIVE
   You must return an object with a least: device_id, cmd and type.
   return device_id: The device_id
   return cmd: command from the device.
   return type: login_request, ping, etc.
   *******************************************/
  this.parse_data = function(data){
    data = data.toString();

    if ( this.isCommandResponse(data) ) {
      var responseData = data.split(" ");

      return {
        action: 'command_response',
        cmd: 'response',
        imei: this.device.uid,
        message: responseData[0]
      };
    }

    var separatedDataWithComma = data.split(",", 28);

    if (separatedDataWithComma.length !== 28) {

      console.log("\n========= Missing data for TK103-2 ==========");
      console.log(data);
      console.log("=============================================\n");

      return false;
    };

    /****************************
     parts.cmd moved komutu çıkarımsal olarak belirlendi.
     ***************************/
    var splitIMEI = separatedDataWithComma[17].split(":");
    var imei = splitIMEI[1];

    var parts={
      "start"                 : 0,
      "device_id"             : imei,
      "imei"                  : imei,
      "cmd"                   : "moved",
      "message"               : separatedDataWithComma[16],
      "data"                  : "$"+separatedDataWithComma.slice(2, 16).join(','),
      "finish"                : 0
    };

    switch(parts.cmd){
    case "BP05":
      parts.action="login_request";
      break;
    case "moved":
      parts.action="ping";
      break;
    case "BO01":
      parts.action="alarm";
      break;
    default:
      parts.action="other";
    }

    return parts;
  }

  this.get_ping_data = function(msg_parts){
    var str = msg_parts.data;

    var data = nmea.parse(str);

    var date = "20"+data.date.substr(4,2)+"/"+data.date.substr(2,2)+"/"+data.date.substr(0,2);
    var time = data.time.substr(0,2)+":"+data.time.substr(2,2)+":"+data.time.substr(4,2);

    var res = {
      latitude		: Number(data.latitude),
      longitude		: Number(data.longitude),
      time              : new Date(date+" "+time),
      speed		: data.speed,
      valid             : data.valid,
      imei              : msg_parts.imei,
      message           : msg_parts.message
    }

    return res;
  }

  this.authorize =function(){
    //send command device
  }

  this.isCommandResponse = function(data) {
    if (!data) {
      return false;
    }

    var response = data.split(" ");
    return response[1] === 'ok!';
  }

}

exports.adapter = adapter;