diff --git a/app/Http/Controllers/BiometricAttendanceController.php b/app/Http/Controllers/BiometricAttendanceController.php
index ba3cdb112..e1d189b72 100644
--- a/app/Http/Controllers/BiometricAttendanceController.php
+++ b/app/Http/Controllers/BiometricAttendanceController.php
@@ -42,7 +42,7 @@ class BiometricAttendanceController extends Controller
             if ($branches->isNotEmpty()) {
                 foreach ($branches as $branch) {
                     try {
-                        $zk = new \Rats\Zkteco\Lib\Zkteco($branch->zkteco_ip);
+                        $zk = new \App\Library\ZKTeco\ZKTeco($branch->zkteco_ip);
                         if ($zk->connect()) {
                             $raw_attendance = $zk->getAttendance();
                             $startTs = strtotime(strlen($start_date) == 10 ? $start_date . ' 00:00:00' : $start_date);
@@ -67,7 +67,7 @@ class BiometricAttendanceController extends Controller
             } else if (!empty($api_urls)) {
                 if ($isDirectIP) {
                     try {
-                        $zk = new \Rats\Zkteco\Lib\Zkteco($api_urls);
+                        $zk = new \App\Library\ZKTeco\ZKTeco($api_urls);
                         if ($zk->connect()) {
                             $raw_attendance = $zk->getAttendance();
                             $startTs = strtotime(strlen($start_date) == 10 ? $start_date . ' 00:00:00' : $start_date);
@@ -234,7 +234,7 @@ class BiometricAttendanceController extends Controller
 
                 if ($isDirectIP) {
                     try {
-                        $zk = new \Rats\Zkteco\Lib\Zkteco($api_urls);
+                        $zk = new \App\Library\ZKTeco\ZKTeco($api_urls);
                         if ($zk->connect()) {
                             $raw_attendance = $zk->getAttendance();
                             foreach ($raw_attendance as $record) {
@@ -351,7 +351,7 @@ class BiometricAttendanceController extends Controller
             if ($branches->isNotEmpty()) {
                 foreach ($branches as $branch) {
                     try {
-                        $zk = new \Rats\Zkteco\Lib\Zkteco($branch->zkteco_ip);
+                        $zk = new \App\Library\ZKTeco\ZKTeco($branch->zkteco_ip);
                         if ($zk->connect()) {
                             $raw_attendance = $zk->getAttendance();
                             $startTs = strtotime($start_date . ' 00:00:00');
@@ -374,7 +374,7 @@ class BiometricAttendanceController extends Controller
             } else if (!empty($api_urls)) {
                 if ($isDirectIP) {
                     try {
-                        $zk = new \Rats\Zkteco\Lib\Zkteco($api_urls);
+                        $zk = new \App\Library\ZKTeco\ZKTeco($api_urls);
                         if ($zk->connect()) {
                             $raw_attendance = $zk->getAttendance();
                             $startTs = strtotime($start_date . ' 00:00:00');
diff --git a/app/Http/Controllers/BranchController.php b/app/Http/Controllers/BranchController.php
index b51a16648..24f364d04 100644
--- a/app/Http/Controllers/BranchController.php
+++ b/app/Http/Controllers/BranchController.php
@@ -202,7 +202,7 @@ class BranchController extends Controller
         ]);
 
         try {
-            $zk = new \Rats\Zkteco\Lib\ZKTeco($request->zkteco_ip, 4370);
+            $zk = new \App\Library\ZKTeco\ZKTeco($request->zkteco_ip, 4370);
             if ($zk->connect()) {
                 $deviceName = $zk->deviceName();
                 $serialNumber = $zk->serialNumber();
diff --git a/app/Library/ZKTeco/Helper/Attendance.php b/app/Library/ZKTeco/Helper/Attendance.php
new file mode 100644
index 000000000..a8dc8cb5f
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Attendance.php
@@ -0,0 +1,72 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Attendance
+{
+    /**
+     * @param ZKTeco $self
+     * @return array [uid, id, state, timestamp]
+     */
+    static public function get(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_ATT_LOG_RRQ;
+        $command_string = '';
+
+        $session = $self->_command($command, $command_string, Util::COMMAND_TYPE_DATA);
+        if ($session === false) {
+            return [];
+        }
+
+        $attData = Util::recData($self);
+
+        $attendance = [];
+        if (!empty($attData)) {
+            $attData = substr($attData, 10);
+
+            while (strlen($attData) > 40) {
+                $u = unpack('H78', substr($attData, 0, 39));
+
+                $u1 = hexdec(substr($u[1], 4, 2));
+                $u2 = hexdec(substr($u[1], 6, 2));
+                $uid = $u1 + ($u2 * 256);
+                $id = hex2bin(substr($u[1], 8, 18));
+                $id = str_replace(chr(0), '', $id);
+                $state = hexdec(substr($u[1], 56, 2));
+                $timestamp = Util::decodeTime(hexdec(Util::reverseHex(substr($u[1], 58, 8))));
+                $type = hexdec(Util::reverseHex(substr($u[1], 66, 2 )));
+				
+                $attendance[] = [
+                    'uid' => $uid,
+                    'id' => $id,
+                    'state' => $state,
+                    'timestamp' => $timestamp,
+                    'type' => $type
+                ];
+
+                $attData = substr($attData, 40);
+            }
+
+        }
+
+        return $attendance;
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function clear(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_CLEAR_ATT_LOG;
+        $command_string = '';
+
+        return $self->_command($command, $command_string);
+    }
+}
diff --git a/app/Library/ZKTeco/Helper/Connect.php b/app/Library/ZKTeco/Helper/Connect.php
new file mode 100644
index 000000000..25bbcab75
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Connect.php
@@ -0,0 +1,83 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\Helper\Util;
+use App\Library\ZKTeco\ZKTeco;
+use ErrorException;
+use Exception;
+
+class Connect
+{
+    /**
+     * @param ZKTeco $self
+     * @return bool
+     */
+    static public function connect(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_CONNECT;
+        $command_string = '';
+        $chksum = 0;
+        $session_id = 0;
+        $reply_id = -1 + Util::USHRT_MAX;
+
+        $buf = Util::createHeader($command, $chksum, $session_id, $reply_id, $command_string);
+
+        socket_sendto($self->_zkclient, $buf, strlen($buf), 0, $self->_ip, $self->_port);
+
+        try {
+            @socket_recvfrom($self->_zkclient, $self->_data_recv, 1024, 0, $self->_ip, $self->_port);
+            if (strlen($self->_data_recv) > 0) {
+                $u = unpack('H2h1/H2h2/H2h3/H2h4/H2h5/H2h6', substr($self->_data_recv, 0, 8));
+
+                $session = hexdec($u['h6'] . $u['h5']);
+                if (empty($session)) {
+                    return false;
+                }
+
+                $self->_session_id = $session;
+                return Util::checkValid($self->_data_recv);
+            } else {
+                return false;
+            }
+        } catch (ErrorException $e) {
+            return false;
+        } catch (Exception $e) {
+            return false;
+        }
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @return bool
+     */
+    static public function disconnect(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_EXIT;
+        $command_string = '';
+        $chksum = 0;
+        $session_id = $self->_session_id;
+
+        $u = unpack('H2h1/H2h2/H2h3/H2h4/H2h5/H2h6/H2h7/H2h8', substr($self->_data_recv, 0, 8));
+        $reply_id = hexdec($u['h8'] . $u['h7']);
+
+        $buf = Util::createHeader($command, $chksum, $session_id, $reply_id, $command_string);
+
+
+        socket_sendto($self->_zkclient, $buf, strlen($buf), 0, $self->_ip, $self->_port);
+        try {
+            @socket_recvfrom($self->_zkclient, $self->_data_recv, 1024, 0, $self->_ip, $self->_port);
+
+            $self->_session_id = 0;
+            return Util::checkValid($self->_data_recv);
+        } catch (ErrorException $e) {
+            return false;
+        } catch (Exception $e) {
+            return false;
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/Device.php b/app/Library/ZKTeco/Helper/Device.php
new file mode 100644
index 000000000..0fbb01c85
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Device.php
@@ -0,0 +1,151 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Device
+{
+  /**
+   * @param ZKTeco $self
+   * @return bool|mixed
+   */
+  static public function name(ZKTeco $self)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_DEVICE;
+    $command_string = '~DeviceName';
+
+    return $self->_command($command, $command_string);
+  }
+
+  /**
+   * @param ZKTeco $self
+   * @return bool|mixed
+   */
+  static public function enable(ZKTeco $self)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_ENABLE_DEVICE;
+    $command_string = '';
+
+    return $self->_command($command, $command_string);
+  }
+
+  /**
+   * @param ZKTeco $self
+   * @return bool|mixed
+   */
+  static public function disable(ZKTeco $self)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_DISABLE_DEVICE;
+    $command_string = chr(0) . chr(0);
+
+    return $self->_command($command, $command_string);
+  }
+
+  /**
+   * @param ZKTeco $self
+   * @return bool|mixed *** this will turn off the device
+   */
+  public static function powerOff(ZKTeco $self)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_POWEROFF;
+    $command_string = chr(0) . chr(0);
+    return $self->_command($command, $command_string);
+  }
+
+
+  /**
+   * @param ZKTeco $self
+   * @return bool|mixed *** this will restart the device
+   */
+  public static function restart(ZKTeco $self)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_RESTART;
+    $command_string = chr(0) . chr(0);
+    return $self->_command($command, $command_string);
+  }
+
+
+  /**
+   * @param ZKTeco $self
+   * @return bool|mixed *** this will sleep the device
+   */
+  public static function sleep(ZKTeco $self)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_SLEEP;
+    $command_string = chr(0) . chr(0);
+    return $self->_command($command, $command_string);
+  }
+
+
+  /**
+   * @param ZKTeco $self
+   * @return bool|mixed *** this will resume the device from sleep
+   */
+  public static function resume(ZKTeco $self)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_RESUME;
+    $command_string = chr(0) . chr(0);
+    return $self->_command($command, $command_string);
+  }
+
+
+  /**
+   * @param ZKTeco $self
+   * @return bool|mixed *** this will play voice "Thank you"
+   */
+  public static function testVoice(ZKTeco $self)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_TESTVOICE;
+    $command_string = chr(0) . chr(0);
+    return $self->_command($command, $command_string);
+  }
+
+
+  /**
+   * @param ZKTeco $self
+   * @return bool|mixed *** this will clear the LCD screen
+   */
+  public static function clearLCD(ZKTeco $self)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_CLEAR_LCD;
+    return $self->_command($command, '');
+  }
+
+
+  /**
+   * @param ZKTeco $self
+   * @param $rank *** Line number of text
+   * @param $text *** Text which will display in the LCD screen
+   * @return bool|mixed *** this will write text into the LCD
+   */
+  public static function writeLCD(ZKTeco $self, $rank, $text)
+  {
+    $self->_section = __METHOD__;
+
+    $command = Util::CMD_WRITE_LCD;
+    $byte1 = chr((int)($rank % 256));
+    $byte2 = chr((int)($rank >> 8));
+    $byte3 = chr(0);
+    $command_string = $byte1.$byte2.$byte3.' '.$text;
+    return $self->_command($command, $command_string);
+  }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/Face.php b/app/Library/ZKTeco/Helper/Face.php
new file mode 100644
index 000000000..6d8594072
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Face.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Face
+{
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function on(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_DEVICE;
+        $command_string = 'FaceFunOn';
+
+        return $self->_command($command, $command_string);
+    }
+}
+
diff --git a/app/Library/ZKTeco/Helper/Fingerprint.php b/app/Library/ZKTeco/Helper/Fingerprint.php
new file mode 100644
index 000000000..e0ef1395a
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Fingerprint.php
@@ -0,0 +1,166 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Fingerprint
+{
+    /**
+     * TODO: Can get data, but don't know how to parse the data. Need more documentation about it...
+     *
+     * @param ZKTeco $self
+     * @param integer $uid Unique Employee ID in ZK device
+     * @return array Binary fingerprint data array (where key is finger ID (0-9))
+     */
+    static public function get(ZKTeco $self, $uid)
+    {
+        $self->_section = __METHOD__;
+
+        $data = [];
+        //fingers of the hands
+        for ($i = 0; $i <= 9; $i++) {
+          $finger = new Fingerprint();
+            $tmp = $finger->_getFinger($self, $uid, $i);
+            if ($tmp['size'] > 0) {
+                $data[$i] = $tmp['tpl'];
+            }
+            unset($tmp);
+        }
+        return $data;
+    }
+
+
+    /**
+     * @param ZKTeco $self
+     * @param integer $uid Unique Employee ID in ZK device
+     * @param integer $finger Finger ID (0-9)
+     * @return array
+     */
+    private function _getFinger(ZKTeco $self, $uid, $finger)
+    {
+        $command = Util::CMD_USER_TEMP_RRQ;
+        $byte1 = chr((int)($uid % 256));
+        $byte2 = chr((int)($uid >> 8));
+        $command_string = $byte1 . $byte2 . chr($finger);
+
+        $ret = [
+            'size' => 0,
+            'tpl' => ''
+        ];
+
+        $session = $self->_command($command, $command_string, Util::COMMAND_TYPE_DATA);
+        if ($session === false) {
+            return $ret;
+        }
+
+        $data = Util::recData($self, 10, false);
+
+        if (!empty($data)) {
+            $templateSize = strlen($data);
+            $prefix = chr($templateSize % 256) . chr(round($templateSize / 256)) . $byte1 . $byte2 . chr($finger) . chr(1);
+            $data = $prefix . $data;
+            if (strlen($templateSize) > 0) {
+                $ret['size'] = $templateSize;
+                $ret['tpl'] = $data;
+            }
+        }
+
+        return $ret;
+    }
+
+    /**
+     * TODO: Still can not set fingerprint. Need more documentation about it...
+     *
+     * @param ZKTeco $self
+     * @param int $uid Unique Employee ID in ZK device
+     * @param array $data Binary fingerprint data array (where key is finger ID (0-9) same like returned array from 'get' method)
+     * @return int Count of added fingerprints
+     */
+    static public function set(ZKTeco $self, $uid, array $data)
+    {
+        $self->_section = __METHOD__;
+
+
+        $count = 0;
+        foreach ($data as $finger => $item) {
+            $allowSet = true;
+            $fingerPrint = new Fingerprint();
+            if ($fingerPrint->_checkFinger($self, $uid, $finger) === true) {
+                $allowSet = $fingerPrint->_removeFinger($self, $uid, $finger);
+            }
+            if ($allowSet === true && $fingerPrint->_setFinger($self, $item) === true) {
+                $count++;
+            }
+        }
+
+        return $count;
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @param string $data Binary fingerprint data item
+     * @return bool|mixed
+     */
+    private function _setFinger(ZKTeco $self, $data)
+    {
+        $command = Util::CMD_USER_TEMP_WRQ;
+        $command_string = $data;
+
+        return $self->_command($command, $command_string);
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @param int $uid Unique Employee ID in ZK device
+     * @param array $data Fingers ID array (0-9)
+     * @return int Count of deleted fingerprints
+     */
+    static public function remove(ZKTeco $self, $uid, array $data)
+    {
+        $self->_section = __METHOD__;
+
+        $count = 0;
+        foreach ($data as $finger) {
+          $fingerPrint = new Fingerprint();
+            if ($fingerPrint->_checkFinger($self, $uid, $finger) === true) {
+                if ($fingerPrint->_removeFinger($self, $uid, $finger) === true) {
+                    $count++;
+                }
+            }
+        }
+
+        return $count;
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @param int $uid Unique Employee ID in ZK device
+     * @param int $finger Finger ID (0-9)
+     * @return bool
+     */
+    private function _removeFinger(ZKTeco $self, $uid, $finger)
+    {
+        $command = Util::CMD_DELETE_USER_TEMP;
+        $byte1 = chr((int)($uid % 256));
+        $byte2 = chr((int)($uid >> 8));
+        $command_string = ($byte1 . $byte2) . chr($finger);
+
+        $self->_command($command, $command_string);
+        $fingerPrint = new Fingerprint();
+        return !($fingerPrint->_checkFinger($self, $uid, $finger));
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @param int $uid Unique Employee ID in ZK device
+     * @param int $finger Finger ID (0-9)
+     * @return bool Returned true if exist
+     */
+    private function _checkFinger(ZKTeco $self, $uid, $finger)
+    {
+      $fingerPrint = new Fingerprint();
+        $res = $fingerPrint->_getFinger($self, $uid, $finger);
+        return (bool)($res['size'] > 0);
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/Os.php b/app/Library/ZKTeco/Helper/Os.php
new file mode 100644
index 000000000..d6c4b7a0c
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Os.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Os
+{
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function get(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_DEVICE;
+        $command_string = '~OS';
+
+        return $self->_command($command, $command_string);
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/Pin.php b/app/Library/ZKTeco/Helper/Pin.php
new file mode 100644
index 000000000..99245c193
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Pin.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Pin
+{
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function width(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_DEVICE;
+        $command_string = '~PIN2Width';
+
+        return $self->_command($command, $command_string);
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/Platform.php b/app/Library/ZKTeco/Helper/Platform.php
new file mode 100644
index 000000000..e60269cde
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Platform.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Platform
+{
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function get(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_DEVICE;
+        $command_string = '~Platform';
+
+        return $self->_command($command, $command_string);
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function getVersion(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_DEVICE;
+        $command_string = '~ZKFPVersion';
+
+        return $self->_command($command, $command_string);
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/SerialNumber.php b/app/Library/ZKTeco/Helper/SerialNumber.php
new file mode 100644
index 000000000..16211add1
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/SerialNumber.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class SerialNumber
+{
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function get(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_DEVICE;
+        $command_string = '~SerialNumber';
+
+        return $self->_command($command, $command_string);
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/Ssr.php b/app/Library/ZKTeco/Helper/Ssr.php
new file mode 100644
index 000000000..b0debd0eb
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Ssr.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Ssr
+{
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function get(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_DEVICE;
+        $command_string = '~SSR';
+
+        return $self->_command($command, $command_string);
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/Time.php b/app/Library/ZKTeco/Helper/Time.php
new file mode 100644
index 000000000..babdef96d
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Time.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Time
+{
+    /**
+     * @param ZKTeco $self
+     * @param string $t Format: "Y-m-d H:i:s"
+     * @return bool|mixed
+     */
+    static public function set(ZKTeco $self, $t)
+    {
+      die($t);
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_SET_TIME;
+        $command_string = pack('I', Util::encodeTime($t));
+
+        return $self->_command($command, $command_string);
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function get(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_GET_TIME;
+        $command_string = '';
+
+        $ret = $self->_command($command, $command_string);
+
+        if ($ret) {
+            return Util::decodeTime(hexdec(Util::reverseHex(bin2hex($ret))));
+        } else {
+            return false;
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/User.php b/app/Library/ZKTeco/Helper/User.php
new file mode 100644
index 000000000..93bf34396
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/User.php
@@ -0,0 +1,161 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class User
+{
+    /**
+     * @param ZKTeco $self
+     * @param int $uid Unique ID (max 65535)
+     * @param int|string $userid (max length = 9, only numbers - depends device setting)
+     * @param string $name (max length = 24)
+     * @param int|string $password (max length = 8, only numbers - depends device setting)
+     * @param int $role Default Util::LEVEL_USER
+     * @param int $cardno Default 0 (max length = 10, only numbers)
+     * @return bool|mixed
+     */
+    static public function set(ZKTeco $self, $uid, $userid, $name, $password, $role = Util::LEVEL_USER, $cardno = 0)
+    {
+        $self->_section = __METHOD__;
+
+        if (
+            (int)$uid === 0 ||
+            (int)$uid > Util::USHRT_MAX ||
+            strlen($userid) > 9 ||
+            strlen($name) > 24 ||
+            strlen($password) > 8 ||
+            strlen($cardno) > 10
+        ) {
+            return false;
+        }
+
+        $command = Util::CMD_SET_USER;
+        $byte1 = chr((int)($uid % 256));
+        $byte2 = chr((int)($uid >> 8));
+        $cardno = hex2bin(Util::reverseHex(dechex($cardno)));
+
+        $command_string = implode('', [
+            $byte1,
+            $byte2,
+            chr($role),
+            str_pad($password, 8, chr(0)),
+            str_pad($name, 24, chr(0)),
+            str_pad($cardno, 4, chr(0)),
+            str_pad(chr(1), 9, chr(0)),
+            str_pad($userid, 9, chr(0)),
+            str_repeat(chr(0), 15)
+        ]);
+//        die($command_string);
+        return $self->_command($command, $command_string);
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @return array [userid, name, cardno, uid, role, password]
+     */
+    static public function get(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_USER_TEMP_RRQ;
+        $command_string = chr(Util::FCT_USER);
+
+        $session = $self->_command($command, $command_string, Util::COMMAND_TYPE_DATA);
+        if ($session === false) {
+            return [];
+        }
+
+        $userData = Util::recData($self);
+
+        $users = [];
+        if (!empty($userData)) {
+            $userData = substr($userData, 11);
+
+            while (strlen($userData) > 72) {
+                $u = unpack('H144', substr($userData, 0, 72));
+
+                $u1 = hexdec(substr($u[1], 2, 2));
+                $u2 = hexdec(substr($u[1], 4, 2));
+                $uid = $u1 + ($u2 * 256);
+                $cardno = hexdec(substr($u[1], 78, 2) . substr($u[1], 76, 2) . substr($u[1], 74, 2) . substr($u[1], 72, 2)) . ' ';
+                $role = hexdec(substr($u[1], 6, 2)) . ' ';
+                $password = hex2bin(substr($u[1], 8, 16)) . ' ';
+                $name = hex2bin(substr($u[1], 24, 74)) . ' ';
+                $userid = hex2bin(substr($u[1], 98, 72)) . ' ';
+
+                //Clean up some messy characters from the user name
+                $password = explode(chr(0), $password, 2);
+                $password = $password[0];
+                $userid = explode(chr(0), $userid, 2);
+                $userid = $userid[0];
+                $name = explode(chr(0), $name, 3);
+                $name = utf8_encode($name[0]);
+                $cardno = str_pad($cardno, 11, '0', STR_PAD_LEFT);
+
+                if ($name == '') {
+                    $name = $userid;
+                }
+
+                $users[$userid] = [
+                    'uid' => $uid,
+                    'userid' => $userid,
+                    'name' => $name,
+                    'role' => intval($role),
+                    'password' => $password,
+                    'cardno' => $cardno,
+                ];
+
+                $userData = substr($userData, 72);
+            }
+        }
+
+        return $users;
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function clear(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_CLEAR_DATA;
+        $command_string = '';
+
+        return $self->_command($command, $command_string);
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function clearAdmin(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_CLEAR_ADMIN;
+        $command_string = '';
+
+        return $self->_command($command, $command_string);
+    }
+
+    /**
+     * @param ZKTeco $self
+     * @param integer $uid
+     * @return bool|mixed
+     */
+    static public function remove(ZKTeco $self, $uid)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_DELETE_USER;
+        $byte1 = chr((int)($uid % 256));
+        $byte2 = chr((int)($uid >> 8));
+        $command_string = ($byte1 . $byte2);
+
+        return $self->_command($command, $command_string);
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/Util.php b/app/Library/ZKTeco/Helper/Util.php
new file mode 100644
index 000000000..0605d2561
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Util.php
@@ -0,0 +1,427 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class Util
+{
+  const USHRT_MAX = 65535;
+
+  const CMD_CONNECT = 1000; # Connections requests
+  const CMD_EXIT = 1001; # Disconnection requests
+  const CMD_ENABLE_DEVICE = 1002; # Ensure the machine to be at the normal work condition
+  const CMD_DISABLE_DEVICE = 1003; # Make the machine to be at the shut-down condition, generally demonstrates ‘in the work ...’on LCD
+
+  const CMD_RESTART = 1004; # Restart the machine
+  const CMD_POWEROFF = 1005; # Turn Off the machine
+  const CMD_SLEEP = 1006; # Sleep the machine
+  const CMD_RESUME = 1007; # Resume the machine from Sleep
+  const CMD_TEST_TEMP = 1011;
+  const CMD_TESTVOICE = 1017; # Voice test to the device
+  const CMD_CHANGE_SPEED = 1101;
+
+
+  const CMD_WRITE_LCD = 66; # Write in LCD
+  const CMD_CLEAR_LCD = 67; # Clear LCD
+
+  const CMD_ACK_OK = 2000; # Return value for order perform successfully
+  const CMD_ACK_ERROR = 2001; # Return value for order perform failed
+  const CMD_ACK_DATA = 2002; # Return data
+  const CMD_ACK_UNAUTH = 2005; # Connection unauthorized
+
+  const CMD_PREPARE_DATA = 1500; # Prepares to transmit the data
+  const CMD_DATA = 1501; # Transmit a data packet
+  const CMD_FREE_DATA = 1502; # Clear machines open buffer
+
+  const CMD_USER_TEMP_RRQ = 9; # Read some fingerprint template or some kind of data entirely
+  const CMD_ATT_LOG_RRQ = 13; # Read all attendance record
+  const CMD_CLEAR_DATA = 14; # Clear Data
+  const CMD_CLEAR_ATT_LOG = 15; # Clear attendance records
+
+  const CMD_GET_TIME = 201; # Obtain the machine time
+  const CMD_SET_TIME = 202; # Set machines time
+
+  const CMD_VERSION = 1100; # Obtain the firmware edition
+  const CMD_DEVICE = 11; # Read in the machine some configuration parameter
+
+  const CMD_SET_USER = 8; # Upload the user information (from PC to terminal).
+  const CMD_USER_TEMP_WRQ = 10; # Upload some fingerprint template
+  const CMD_DELETE_USER = 18; # Delete some user
+  const CMD_DELETE_USER_TEMP = 19; # Delete some fingerprint template
+  const CMD_CLEAR_ADMIN = 20; # Cancel the manager
+
+  const LEVEL_USER = 0; # User level as User
+  const LEVEL_ADMIN = 14; # User level as Admin
+
+  const FCT_ATTLOG = 1;
+  const FCT_WORKCODE = 8;
+  const FCT_FINGERTMP = 2;
+  const FCT_OPLOG = 4;
+  const FCT_USER = 5;
+  const FCT_SMS = 6;
+  const FCT_UDATA = 7;
+
+  const COMMAND_TYPE_GENERAL = 'general';
+  const COMMAND_TYPE_DATA = 'data';
+
+  const ATT_STATE_FINGERPRINT = 1;
+  const ATT_STATE_PASSWORD = 0;
+  const ATT_STATE_CARD = 2;
+
+  const ATT_TYPE_CHECK_IN = 0;
+  const ATT_TYPE_CHECK_OUT = 1;
+  const ATT_TYPE_OVERTIME_IN = 4;
+  const ATT_TYPE_OVERTIME_OUT = 5;
+
+  /**
+   * Encode a timestamp send at the timeclock
+   * copied from zkemsdk.c - EncodeTime
+   *
+   * @param string $t Format: "Y-m-d H:i:s"
+   * @return int
+   */
+  static public function encodeTime($t)
+  {
+    $timestamp = strtotime($t);
+    $t = (object)[
+      'year' => (int)date('Y', $timestamp),
+      'month' => (int)date('m', $timestamp),
+      'day' => (int)date('d', $timestamp),
+      'hour' => (int)date('H', $timestamp),
+      'minute' => (int)date('i', $timestamp),
+      'second' => (int)date('s', $timestamp),
+    ];
+
+    $d = (($t->year % 100) * 12 * 31 + (($t->month - 1) * 31) + $t->day - 1) *
+      (24 * 60 * 60) + ($t->hour * 60 + $t->minute) * 60 + $t->second;
+
+    return $d;
+  }
+
+  /**
+   * Decode a timestamp retrieved from the timeclock
+   * copied from zkemsdk.c - DecodeTime
+   *
+   * @param int|string $t
+   * @return false|string Format: "Y-m-d H:i:s"
+   */
+  static public function decodeTime($t)
+  {
+    $second = $t % 60;
+    $t = $t / 60;
+
+    $minute = $t % 60;
+    $t = $t / 60;
+
+    $hour = $t % 24;
+    $t = $t / 24;
+
+    $day = $t % 31 + 1;
+    $t = $t / 31;
+
+    $month = $t % 12 + 1;
+    $t = $t / 12;
+
+    $year = floor($t + 2000);
+
+    $d = date('Y-m-d H:i:s', strtotime(
+      $year . '-' . $month . '-' . $day . ' ' . $hour . ':' . $minute . ':' . $second
+    ));
+
+    return $d;
+  }
+
+  /**
+   * @param string $hex
+   * @return string
+   */
+  static public function reverseHex($hex)
+  {
+    $tmp = '';
+
+    for ($i = strlen($hex); $i >= 0; $i--) {
+      $tmp .= substr($hex, $i, 2);
+      $i--;
+    }
+
+    return $tmp;
+  }
+
+  /**
+   * Checks a returned packet to see if it returned self::CMD_PREPARE_DATA,
+   * indicating that data packets are to be sent
+   * Returns the amount of bytes that are going to be sent
+   *
+   * @param ZKTeco $self
+   * @return bool|number
+   */
+  static public function getSize(ZKTeco $self)
+  {
+    $u = unpack('H2h1/H2h2/H2h3/H2h4/H2h5/H2h6/H2h7/H2h8', substr($self->_data_recv, 0, 8));
+    $command = hexdec($u['h2'] . $u['h1']);
+
+    if ($command == self::CMD_PREPARE_DATA) {
+      $u = unpack('H2h1/H2h2/H2h3/H2h4', substr($self->_data_recv, 8, 4));
+      $size = hexdec($u['h4'] . $u['h3'] . $u['h2'] . $u['h1']);
+      return $size;
+    } else {
+      return false;
+    }
+  }
+
+  /**
+   * This function calculates the chksum of the packet to be sent to the
+   * time clock
+   * Copied from zkemsdk.c
+   *
+   * @inheritdoc
+   */
+  static public function createChkSum($p)
+  {
+    $l = count($p);
+    $chksum = 0;
+    $i = $l;
+    $j = 1;
+    while ($i > 1) {
+      $u = unpack('S', pack('C2', $p['c' . $j], $p['c' . ($j + 1)]));
+
+      $chksum += $u[1];
+
+      if ($chksum > self::USHRT_MAX) {
+        $chksum -= self::USHRT_MAX;
+      }
+      $i -= 2;
+      $j += 2;
+    }
+
+    if ($i) {
+      $chksum = $chksum + $p['c' . strval(count($p))];
+    }
+
+    while ($chksum > self::USHRT_MAX) {
+      $chksum -= self::USHRT_MAX;
+    }
+
+    if ($chksum > 0) {
+      $chksum = -($chksum);
+    } else {
+      $chksum = abs($chksum);
+    }
+
+    $chksum -= 1;
+    while ($chksum < 0) {
+      $chksum += self::USHRT_MAX;
+    }
+
+    return pack('S', $chksum);
+  }
+
+  /**
+   * This function puts a the parts that make up a packet together and
+   * packs them into a byte string
+   *
+   * @inheritdoc
+   */
+  static public function createHeader($command, $chksum, $session_id, $reply_id, $command_string)
+  {
+    $buf = pack('SSSS', $command, $chksum, $session_id, $reply_id) . $command_string;
+
+    $buf = unpack('C' . (8 + strlen($command_string)) . 'c', $buf);
+
+    $u = unpack('S', self::createChkSum($buf));
+
+    if (is_array($u)) {
+      $u = reset($u);
+    }
+    $chksum = $u;
+
+    $reply_id += 1;
+
+    if ($reply_id >= self::USHRT_MAX) {
+      $reply_id -= self::USHRT_MAX;
+    }
+
+    $buf = pack('SSSS', $command, $chksum, $session_id, $reply_id);
+
+    return $buf . $command_string;
+
+  }
+
+  /**
+   * Checks a returned packet to see if it returned Util::CMD_ACK_OK,
+   * indicating success
+   *
+   * @inheritdoc
+   */
+  static public function checkValid($reply)
+  {
+    $u = unpack('H2h1/H2h2', substr($reply, 0, 8));
+
+    $command = hexdec($u['h2'] . $u['h1']);
+    /** TODO: Some device can return 'Connection unauthorized' then should check also */
+    if ($command == self::CMD_ACK_OK || $command == self::CMD_ACK_UNAUTH) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  /**
+   * Get User Role string
+   * @param integer $role
+   * @return string
+   */
+  static public function getUserRole($role)
+  {
+    switch ($role) {
+      case self::LEVEL_USER:
+        $ret = 'User';
+        break;
+      case self::LEVEL_ADMIN:
+        $ret = 'Admin';
+        break;
+      default:
+        $ret = 'Unknown';
+    }
+
+    return $ret;
+  }
+
+  /**
+   * Get Attendance State string
+   * @param integer $state
+   * @return string
+   */
+  static public function getAttState($state)
+  {
+    switch ($state) {
+      case self::ATT_STATE_FINGERPRINT:
+        $ret = 'Fingerprint';
+        break;
+      case self::ATT_STATE_PASSWORD:
+        $ret = 'Password';
+        break;
+      case self::ATT_STATE_CARD:
+        $ret = 'Card';
+        break;
+      default:
+        $ret = 'Unknown';
+    }
+
+    return $ret;
+  }
+
+  /**
+   * Get Attendance Type string
+   * @param integer $type
+   * @return string
+   */
+  static public function getAttType($type)
+  {
+    switch ($type) {
+      case self::ATT_TYPE_CHECK_IN:
+        $ret = 'Check-in';
+        break;
+      case self::ATT_TYPE_CHECK_OUT:
+        $ret = 'Check-out';
+        break;
+      case self::ATT_TYPE_OVERTIME_IN:
+        $ret = 'Overtime-in';
+        break;
+      case self::ATT_TYPE_OVERTIME_OUT:
+        $ret = 'Overtime-out';
+        break;
+      default:
+        $ret = 'Undefined';
+    }
+
+    return $ret;
+  }
+
+  /**
+   * Receive data from device
+   * @param ZKTeco $self
+   * @param int $maxErrors
+   * @param bool $first if 'true' don't remove first 4 bytes for first row
+   * @return string
+   */
+  static public function recData(ZKTeco $self, $maxErrors = 10, $first = true)
+  {
+    $data = '';
+    $bytes = self::getSize($self);
+
+    if ($bytes) {
+      $received = 0;
+      $errors = 0;
+
+      while ($bytes > $received) {
+        $ret = @socket_recvfrom($self->_zkclient, $dataRec, 1032, 0, $self->_ip, $self->_port);
+
+        if ($ret === false) {
+          if ($errors < $maxErrors) {
+            //try again if false
+            $errors++;
+            sleep(1);
+            continue;
+          } else {
+            //return empty if has maximum count of errors
+            self::logReceived($self, $received, $bytes);
+            unset($data);
+            return '';
+          }
+        }
+
+        if ($first === false) {
+          //The first 4 bytes don't seem to be related to the user
+          $dataRec = substr($dataRec, 8);
+        }
+
+        $data .= $dataRec;
+        $received += strlen($dataRec);
+
+        unset($dataRec);
+        $first = false;
+      }
+
+      //flush socket
+      @socket_recvfrom($self->_zkclient, $dataRec, 1024, 0, $self->_ip, $self->_port);
+      unset($dataRec);
+    }
+
+    return $data;
+  }
+
+  /**
+   * @param ZKTeco $self
+   * @param int $received
+   * @param int $bytes
+   */
+  static private function logReceived(ZKTeco $self, $received, $bytes)
+  {
+    self::logger($self, 'Received: ' . $received . ' of ' . $bytes . ' bytes');
+  }
+
+  /**
+   * Write log
+   * @param ZKTeco $self
+   * @param string $str
+   */
+  static private function logger(ZKTeco $self, $str)
+  {
+    if (defined('ZK_LIB_LOG')) {
+      //use constant if defined
+      $log = ZK_LIB_LOG;
+    } else {
+      $dir = dirname(dirname(__FILE__));
+      $log = $dir . '/logs/error.log';
+    }
+
+    $row = '<' . $self->_ip . '> [' . date('d.m.Y H:i:s') . '] ';
+    $row .= (empty($self->_section) ? '' : '(' . $self->_section . ') ');
+    $row .= $str;
+    $row .= PHP_EOL;
+
+    file_put_contents($log, $row, FILE_APPEND);
+  }
+}
diff --git a/app/Library/ZKTeco/Helper/Version.php b/app/Library/ZKTeco/Helper/Version.php
new file mode 100644
index 000000000..922b9c54c
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/Version.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;;
+
+use App\Library\ZKTeco\Helper\Util;
+use App\Library\ZKTeco\ZKTeco;
+
+class Version
+{
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function get(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_VERSION;
+        $command_string = '';
+
+        return $self->_command($command, $command_string);
+    }
+}
\ No newline at end of file
diff --git a/app/Library/ZKTeco/Helper/WorkCode.php b/app/Library/ZKTeco/Helper/WorkCode.php
new file mode 100644
index 000000000..274de63ef
--- /dev/null
+++ b/app/Library/ZKTeco/Helper/WorkCode.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Library\ZKTeco\Helper;
+
+use App\Library\ZKTeco\ZKTeco;
+
+class WorkCode
+{
+    /**
+     * @param ZKTeco $self
+     * @return bool|mixed
+     */
+    static public function get(ZKTeco $self)
+    {
+        $self->_section = __METHOD__;
+
+        $command = Util::CMD_DEVICE;
+        $command_string = 'WorkCode';
+
+        return $self->_command($command, $command_string);
+    }
+}
diff --git a/app/Library/ZKTeco/ZKTeco.php b/app/Library/ZKTeco/ZKTeco.php
new file mode 100644
index 000000000..43f570976
--- /dev/null
+++ b/app/Library/ZKTeco/ZKTeco.php
@@ -0,0 +1,435 @@
+<?php
+
+namespace App\Library\ZKTeco;
+
+use ErrorException;
+use Exception;
+use App\Library\ZKTeco\Helper\Attendance;
+use App\Library\ZKTeco\Helper\Device;
+use App\Library\ZKTeco\Helper\Face;
+use App\Library\ZKTeco\Helper\Fingerprint;
+use App\Library\ZKTeco\Helper\Os;
+use App\Library\ZKTeco\Helper\Pin;
+use App\Library\ZKTeco\Helper\Platform;
+use App\Library\ZKTeco\Helper\SerialNumber;
+use App\Library\ZKTeco\Helper\Ssr;
+use App\Library\ZKTeco\Helper\Time;
+use App\Library\ZKTeco\Helper\User;
+use App\Library\ZKTeco\Helper\Util;
+use App\Library\ZKTeco\Helper\Connect;
+use App\Library\ZKTeco\Helper\Version;
+use App\Library\ZKTeco\Helper\WorkCode;
+
+
+class ZKTeco{
+  public $_ip;
+  public $_port;
+  public $_zkclient;
+
+  public $_data_recv = '';
+  public $_session_id = 0;
+  public $_section = '';
+
+  /**
+   * ZKLib constructor.
+   * @param string $ip Device IP
+   * @param integer $port Default: 4370
+   */
+  public function __construct($ip, $port = 4370)
+  {
+    $this->_ip = $ip;
+    $this->_port = $port;
+
+    $this->_zkclient = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
+
+    $timeout = array('sec' => 60, 'usec' => 500000);
+    socket_set_option($this->_zkclient, SOL_SOCKET, SO_RCVTIMEO, $timeout);
+
+  }
+
+  /**
+   * Create and send command to device
+   *
+   * @param string $command
+   * @param string $command_string
+   * @param string $type
+   * @return bool|mixed
+   */
+  public function _command($command, $command_string, $type = Util::COMMAND_TYPE_GENERAL)
+  {
+    $chksum = 0;
+    $session_id = $this->_session_id;
+
+    $u = unpack('H2h1/H2h2/H2h3/H2h4/H2h5/H2h6/H2h7/H2h8', substr($this->_data_recv, 0, 8));
+    $reply_id = hexdec($u['h8'] . $u['h7']);
+
+    $buf = Util::createHeader($command, $chksum, $session_id, $reply_id, $command_string);
+
+    socket_sendto($this->_zkclient, $buf, strlen($buf), 0, $this->_ip, $this->_port);
+
+    try {
+      @socket_recvfrom($this->_zkclient, $this->_data_recv, 1024, 0, $this->_ip, $this->_port);
+
+      $u = unpack('H2h1/H2h2/H2h3/H2h4/H2h5/H2h6', substr($this->_data_recv, 0, 8));
+
+      $ret = false;
+      $session = hexdec($u['h6'] . $u['h5']);
+
+      if ($type === Util::COMMAND_TYPE_GENERAL && $session_id === $session) {
+        $ret = substr($this->_data_recv, 8);
+      } else if ($type === Util::COMMAND_TYPE_DATA && !empty($session)) {
+        $ret = $session;
+      }
+
+      return $ret;
+    } catch (ErrorException $e) {
+      return false;
+    } catch (Exception $e) {
+      return false;
+    }
+  }
+
+  /**
+   * Connect to device
+   *
+   * @return bool
+   */
+  public function connect()
+  {
+    return Connect::connect($this);
+  }
+
+  /**
+   * Disconnect from device
+   *
+   * @return bool
+   */
+  public function disconnect()
+  {
+    return Connect::disconnect($this);
+  }
+
+  /**
+   * Get device version
+   *
+   * @return bool|mixed
+   */
+  public function version()
+  {
+    return Version::get($this);
+  }
+
+  /**
+   * Get OS version
+   *
+   * @return bool|mixed
+   */
+  public function osVersion()
+  {
+    return Os::get($this);
+  }
+
+  /**
+   * Get platform
+   *
+   * @return bool|mixed
+   */
+  public function platform()
+  {
+    return Platform::get($this);
+  }
+
+  /**
+   * Get firmware version
+   *
+   * @return bool|mixed
+   */
+  public function fmVersion()
+  {
+    return Platform::getVersion($this);
+  }
+
+  /**
+   * Get work code
+   *
+   * @return bool|mixed
+   */
+  public function workCode()
+  {
+    return WorkCode::get($this);
+  }
+
+  /**
+   * Get SSR
+   *
+   * @return bool|mixed
+   */
+  public function ssr()
+  {
+    return Ssr::get($this);
+  }
+
+  /**
+   * Get pin width
+   *
+   * @return bool|mixed
+   */
+  public function pinWidth()
+  {
+    return Pin::width($this);
+  }
+
+  /**
+   * @return bool|mixed
+   */
+  public function faceFunctionOn()
+  {
+    return Face::on($this);
+  }
+
+  /**
+   * Get device serial number
+   *
+   * @return bool|mixed
+   */
+  public function serialNumber()
+  {
+    return SerialNumber::get($this);
+  }
+
+  /**
+   * Get device name
+   *
+   * @return bool|mixed
+   */
+  public function deviceName()
+  {
+    return Device::name($this);
+  }
+
+  /**
+   * Disable device
+   *
+   * @return bool|mixed
+   */
+  public function disableDevice()
+  {
+    return Device::disable($this);
+  }
+
+  /**
+   * Enable device
+   *
+   * @return bool|mixed
+   */
+  public function enableDevice()
+  {
+    return Device::enable($this);
+  }
+
+  /**
+   * Get users data
+   *
+   * @return array [userid, name, cardno, uid, role, password]
+   */
+  public function getUser()
+  {
+    return User::get($this);
+  }
+
+  /**
+   * Set user data
+   *
+   * @param int $uid Unique ID (max 65535)
+   * @param int|string $userid ID in DB (same like $uid, max length = 9, only numbers - depends device setting)
+   * @param string $name (max length = 24)
+   * @param int|string $password (max length = 8, only numbers - depends device setting)
+   * @param int $role Default Util::LEVEL_USER
+   * @param int $cardno Default 0 (max length = 10, only numbers)
+   * @return bool|mixed
+   */
+  public function setUser($uid, $userid, $name, $password, $role = Util::LEVEL_USER, $cardno = 0)
+  {
+    return User::set($this, $uid, $userid, $name, $password, $role, $cardno);
+  }
+
+
+
+  /**
+   * Remove All users
+   *
+   * @return bool|mixed
+   */
+  public function clearUsers()
+  {
+    return User::clear($this);
+  }
+
+  /**
+   * Remove admin
+   *
+   * @return bool|mixed
+   */
+  public function clearAdmin()
+  {
+    return User::clearAdmin($this);
+  }
+
+  /**
+   * Remove user by UID
+   *
+   * @param integer $uid
+   * @return bool|mixed
+   */
+  public function removeUser($uid)
+  {
+    return User::remove($this, $uid);
+  }
+
+
+
+  /**
+   * Get fingerprint data array by UID
+   * TODO: Can get data, but don't know how to parse the data. Need more documentation about it...
+   *
+   * @param integer $uid Unique ID (max 65535)
+   * @return array Binary fingerprint data array (where key is finger ID (0-9))
+   */
+  public function getFingerprint($uid)
+  {
+    return Fingerprint::get($this, $uid);
+  }
+
+  /**
+   * Set fingerprint data array
+   * TODO: Still can not set fingerprint. Need more documentation about it...
+   *
+   * @param integer $uid Unique ID (max 65535)
+   * @param array $data Binary fingerprint data array (where key is finger ID (0-9) same like returned array from 'getFingerprint' method)
+   * @return int Count of added fingerprints
+   */
+  public function setFingerprint($uid, array $data)
+  {
+    return Fingerprint::set($this, $uid, $data);
+  }
+
+  /**
+   * Remove fingerprint by UID and fingers ID array
+   *
+   * @param integer $uid Unique ID (max 65535)
+   * @param array $data Fingers ID array (0-9)
+   * @return int Count of deleted fingerprints
+   */
+  public function removeFingerprint($uid, array $data)
+  {
+    return Fingerprint::remove($this, $uid, $data);
+  }
+
+
+  /**
+   * Get attendance log
+   *
+   * @return array [uid, id, state, timestamp]
+   */
+  public function getAttendance()
+  {
+    return Attendance::get($this);
+  }
+
+  /**
+   * Clear attendance log
+   *
+   * @return bool|mixed
+   */
+  public function clearAttendance()
+  {
+    return Attendance::clear($this);
+  }
+
+  /**
+   * Set device time
+   *
+   * @param string $t Format: "Y-m-d H:i:s"
+   * @return bool|mixed
+   */
+  public function setTime($t)
+  {
+    return Time::set($this, $t);
+  }
+
+  /**
+   * Get device time
+   *
+   * @return bool|mixed Format: "Y-m-d H:i:s"
+   */
+  public function getTime()
+  {
+    return Time::get($this);
+  }
+
+
+  /**
+   * turn off the device
+   *
+   * @return bool|mixed
+   */
+  public function shutdown()
+  {
+    return Device::powerOff($this);
+  }
+
+  /**
+   * restart the device
+   *
+   * @return bool|mixed
+   */
+  public function restart()
+  {
+    return Device::restart($this);
+  }
+
+
+  /**
+   * make sleep mood the device
+   *
+   * @return bool|mixed
+   */
+  public function sleep()
+  {
+    return Device::sleep($this);
+  }
+
+
+  /**
+   * resume the device from sleep
+   *
+   * @return bool|mixed
+   */
+  public function resume()
+  {
+    return Device::resume($this);
+  }
+
+
+  /**
+   * voice test Sound will "Thank you"
+   *
+   * @return bool|mixed
+   */
+  public function testVoice()
+  {
+    return Device::testVoice($this);
+  }
+
+
+  public function clearLCD()
+  {
+    return Device::clearLCD($this);
+  }
+
+
+  public function writeLCD()
+  {
+    return Device::writeLCD($this, 2, "RAIHAN Afroz Topu");
+  }
+}
\ No newline at end of file