gps-tracking-ext
Version:
Let you work with some GPS trackers that connects through tcp.
200 lines (172 loc) • 6.57 kB
JavaScript
/* Original code: https://github.com/cnberg/gps-tracking-nodejs/blob/master/lib/adapters/gt06n.js */
f = require('../functions');
var fs = require('fs');
exports.protocol = 'GT06N';
exports.model_name = 'GT06N';
exports.compatible_hardware = ['GT06N/supplier'];
var adapter = function (device) {
if (!(this instanceof adapter)) {
return new adapter(device);
}
this.format = { 'start': '(', 'end': ')', 'separator': '' };
this.device = device;
this.__count = 1;
/*******************************************
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 = f.bufferToHexString(data);
var parts = {
'start': data.substr(0, 4)
};
if (parts['start'] == '7878') {
parts['length'] = parseInt(data.substr(4, 2), 16);
parts['finish'] = data.substr(6 + parts['length'] * 2, 4);
parts['protocal_id'] = data.substr(6, 2);
if (parts['finish'] != '0d0a') {
throw 'finish code incorrect!';
}
if (parts['protocal_id'] == '01') {
parts['device_id'] = data.substr(8, 16);
parts.cmd = 'login_request';
parts.action = 'login_request';
} else if (parts['protocal_id'] == '12') {
parts['device_id'] = '';
parts['data'] = data.substr(8, parts['length'] * 2);
parts.cmd = 'ping';
parts.action = 'ping';
} else if (parts['protocal_id'] == '13') {
parts['device_id'] = '';
parts.cmd = 'heartbeat';
parts.action = 'heartbeat';
} else if (parts['protocal_id'] == '16' || parts['protocal_id'] == '18') {
parts['device_id'] = '';
parts['data'] = data.substr(8, parts['length'] * 2);
parts.cmd = 'alert';
parts.action = 'alert';
} else {
parts['device_id'] = '';
parts.cmd = 'noop';
parts.action = 'noop';
}
} else {
parts['device_id'] = '';
parts.cmd = 'noop';
parts.action = 'noop';
}
return parts;
};
this.authorize = function () {
//this.device.send("\u0078\u0078\u0005\u0001\u0000\u0001\u00d9\u00dc\u000d\u000a");
//return ;
var length = '05';
var protocal_id = '01';
var serial = f.str_pad(this.__count, 4, 0);
var str = length + protocal_id + serial;
this.__count++;
var crc = require('crc');
var crcResult = f.str_pad(crc.crc16(str).toString(16), 4, '0');
var buff = new Buffer('7878' + str + crcResult + '0d0a', 'hex');
var buff = new Buffer('787805010001d9dc0d0a', 'hex');
this.device.send(buff);
};
this.zeroPad = function (nNum, nPad) {
return ('' + (Math.pow(10, nPad) + nNum)).slice(1);
};
this.synchronous_clock = function (msg_parts) {
};
this.receive_heartbeat = function (msg_parts) {
var buff = new Buffer('787805130001d9dc0d0a', 'hex');
this.device.send(buff);
};
this.run_other = function (cmd, msg_parts) {
};
this.request_login_to_device = function () {
//@TODO: Implement this.
};
this.receive_alarm = function (msg_parts) {
//console.log(msg_parts);
var str = msg_parts.data;
var data = {
'date': str.substr(0, 12),
'set_count': str.substr(12, 2),
'latitude_raw': str.substr(14, 8),
'longitude_raw': str.substr(22, 8),
'latitude': this.dex_to_degrees(str.substr(14, 8)),
'longitude': this.dex_to_degrees(str.substr(22, 8)),
'speed': parseInt(str.substr(30, 2), 16),
'orientation': str.substr(32, 4),
'lbs': str.substr(36, 18),
'device_info': f.str_pad(parseInt(str.substr(54, 2)).toString(2), 8, 0),
'power': str.substr(56, 2),
'gsm': str.substr(58, 2),
'alert': str.substr(60, 4),
};
data['power_status'] = data['device_info'][0];
data['gps_status'] = data['device_info'][1];
data['charge_status'] = data['device_info'][5];
data['acc_status'] = data['device_info'][6];
data['defence_status'] = data['device_info'][7];
//console.log('alert');
//console.log(data);
};
this.dex_to_degrees = function (dex) {
return parseInt(dex, 16) / 1800000;
};
this.hex_to_dec = function (hex) {
return parseInt(hex, 16);
}
this.get_ping_data = function (msg_parts) {
var str = msg_parts.data;
var device_str = f.str_pad(parseInt(str.substr(54, 2)).toString(2), 8, 0);
var data = {
gps: {
date: f.hex_gps_time(str.substr(0, 12)),
set_count: f.hex_to_int(str.substr(12, 2)),
latitude: this.dex_to_degrees(str.substr(14, 8)),
longitude: this.dex_to_degrees(str.substr(22, 8)),
speed: parseInt(str.substr(30, 2), 16),
course: f.hex_to_int(str.substr(32, 2)),
status: f.hex_to_int(str.substr(34, 2))
},
lbs: {
mcc: f.hex_to_int(str.substr(36, 2)) + '' + f.hex_to_int(str.substr(38, 2)),
mnc: f.hex_to_int(str.substr(40, 2)),
lac: f.hex_to_int(str.substr(42, 2)),
cell_id: f.hex_to_int(str.substr(44, 2)) + '' + f.hex_to_int(str.substr(46, 2)) + '' + f.hex_to_int(str.substr(48, 2))
},
device_info:
{
power_status: f.hex_to_int(device_str[0]),
gps_status: f.hex_to_int(device_str[1]),
charge_status: f.hex_to_int(device_str[5]),
acc_status: f.hex_to_int(device_str[6]),
defence_status: f.hex_to_int(device_str[7])
}
};
// 'lbs': str.substr(36, 16),
fs.writeFileSync('ping_data.txt', str);
fs.writeFileSync('ping_data.json', JSON.stringify(data));
/*
"device_info" : f.str_pad(parseInt(str.substr(54,2)).toString(2), 8, 0),
"power" : str.substr(56,2),
"gsm" : str.substr(58,2),
"alert" : str.substr(60,4),
data['power_status'] = data['device_info'][0];
data['gps_status'] = data['device_info'][1];
data['charge_status'] = data['device_info'][5];
data['acc_status']= data['device_info'][6];
data['defence_status'] = data['device_info'][7];
*/
//console.log(data);
return data;
};
/* SET REFRESH TIME */
this.set_refresh_time = function (interval, duration) {
};
};
exports.adapter = adapter;