diff --git a/README.md b/README.md
index eda0724..03ed40e 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 ## 1. 简介 ##
 
 
-AT device 软件包是由 RT-Thread AT 组件针对不同 AT 设备的移植文件和示例代码组成，目前支持的 AT 设备有：ESP8266、ESP32、M26、MC20、RW007、MW31、SIM800C、W60X 、SIM76XX、A9/A9G、BC26 、AIR720系列设备等，目前上述设备都完成对 `AT socket` 功能的移植，及设备通过 AT 命令实现标准 socket 编程接口，完成 socket 通讯的功能，具体功能介绍可参考 [《RT-Thread 编程指南》](https://www.rt-thread.org/document/site/programming-manual/at/at/)AT 命令章节 。 
+AT device 软件包是由 RT-Thread AT 组件针对不同 AT 设备的移植文件和示例代码组成，目前支持的 AT 设备有：ESP8266、ESP32、M26、MC20、RW007、MW31、SIM800C、W60X 、SIM76XX、A9/A9G、BC26 、AIR720、ME3616系列设备等，目前上述设备都完成对 `AT socket` 功能的移植，及设备通过 AT 命令实现标准 socket 编程接口，完成 socket 通讯的功能，具体功能介绍可参考 [《RT-Thread 编程指南》](https://www.rt-thread.org/document/site/programming-manual/at/at/)AT 命令章节 。 
 
 ### 1.1. 目录结构 ###
 
@@ -25,6 +25,7 @@ AT device 软件包是由 RT-Thread AT 组件针对不同 AT 设备的移植文
 | class/a9g | A9G 设备针对 AT 组件的移植目录，实现 AT Socket 功能 |
 | class/bc26 | bc26 设备针对 AT 组件的移植目录，实现 AT Socket 功能 |
 | class/air720 | air720 设备针对 AT 组件的移植目录，实现 AT Socket 功能 |
+| class/me3616 | me3616 设备针对 AT 组件的移植目录，实现 AT Socket 功能 |
 ### 1.2 许可证 ###
 
 at_device package 遵循 LGPLv2.1 许可，详见 `LICENSE` 文件。
@@ -68,7 +69,7 @@ AT device 软件包目前已经发布多个版本，各个版本之间选项配
                   Version (V1.6.0)  --->
 
 - **Enable at device init by thread**: 配置开启设备网络初始化是否通过创建线程完成；
-- **AT socket device modules**: AT 设备选择，目前支持 RW007、ESP8266、M26/MC20、EC20、SIM800C、SIM76XX、A9/A9G、BC26 、air720等设备；
+- **AT socket device modules**: AT 设备选择，目前支持 RW007、ESP8266、M26/MC20、EC20、SIM800C、SIM76XX、A9/A9G、BC26 、air720、ME3616等设备；
 - **Version**: 下载软件包版本；
 
 **V2.X.X (laster) 版本配置选项介绍**
@@ -101,6 +102,9 @@ RT-Thread online packages  --->
         [ ]   Notion MW31  --->
         [ ]   WinnerMicro W60X  --->
         [ ]   AiThink A9/A9G  --->
+        [ ]   Quectel BC26  --->
+        [ ]   Luat air720  --->
+        [ ]   GOSUNCN ME3616  --->
         Version (latest)  --->
 ```
 
@@ -128,6 +132,7 @@ RT-Thread online packages  --->
 - **AiThink A9/A9G**：开启 A9/A9G （2G 模块）设备支持；
 - **Quectel BC26**：开启 BC26（NB-IOT 模块）设备支持；
 - **Luat Air720**：开启 air720（4g 模块）设备支持；
+- **GOSUNCN ME3616**：开启 ME3616（NB-IOT 模块）设备支持；
 - **Version** 下载软件包版本；
 
 上面配置选项以 2G 模块和 WIFI 模块选项为例，介绍了`V2.X.X` 版本 AT device 软件包配置方式，如下几点值得注意：
diff --git a/SConscript b/SConscript
index 4ee29d4..90e5173 100644
--- a/SConscript
+++ b/SConscript
@@ -112,6 +112,15 @@ if GetDepend(['AT_DEVICE_USING_AIR720']):
     if GetDepend(['AT_DEVICE_AIR720_SAMPLE']):
         src += Glob('samples/at_sample_air720.c')
         
+# ME3616
+if GetDepend(['AT_DEVICE_USING_ME3616']):
+    path += [cwd + '/class/me3616']
+    src += Glob('class/bc26/at_device_me3616.c')
+    if GetDepend(['AT_USING_SOCKET']):
+        src += Glob('class/bc26/at_socket_me3616.c')
+    if GetDepend(['AT_DEVICE_ME3616_SAMPLE']):
+        src += Glob('samples/at_sample_me3616.c')
+        
 group = DefineGroup('at_device', src, depend = ['PKG_USING_AT_DEVICE'], CPPPATH = path)
 
 Return('group')
diff --git a/class/me3616/at_device_me3616.c b/class/me3616/at_device_me3616.c
new file mode 100644
index 0000000..c9643b7
--- /dev/null
+++ b/class/me3616/at_device_me3616.c
@@ -0,0 +1,941 @@
+/*
+ * File      : at_device_me3616.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-12-30     qiyongzhong  first version
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <at_device_me3616.h>
+
+#define LOG_TAG                         "at.dev.me3616"
+#include <at_log.h>
+
+#ifdef AT_DEVICE_USING_ME3616
+
+#ifndef ME3616_DEEP_SLEEP_EN
+#define ME3616_DEEP_SLEEP_EN              0//module support deep sleep mode
+#endif
+
+#define ME3616_WAIT_CONNECT_TIME          5000
+#define ME3616_THREAD_STACK_SIZE          2048
+#define ME3616_THREAD_PRIORITY            (RT_THREAD_PRIORITY_MAX/2)
+
+static int me3616_power_on(struct at_device *device)
+{
+    struct at_device_me3616 *me3616 = RT_NULL;
+    
+    me3616 = (struct at_device_me3616 *)device->user_data;
+    me3616->power_status = RT_TRUE;
+
+    /* not nead to set pin configuration for me3616 device power on */
+    if (me3616->power_pin == -1)
+    {
+        return(RT_EOK);
+    }
+    
+    rt_pin_write(me3616->power_pin, PIN_HIGH);
+    rt_thread_mdelay(500);
+    rt_pin_write(me3616->power_pin, PIN_LOW);
+    
+    LOG_D("power on success.");
+
+    return(RT_EOK);
+}
+
+static int me3616_power_off(struct at_device *device)
+{
+    at_response_t resp = RT_NULL;
+    struct at_device_me3616 *me3616 = RT_NULL;
+    
+    resp = at_create_resp(64, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return(-RT_ERROR);
+    }
+
+    at_obj_exec_cmd(device->client, resp, "AT+ZTURNOFF");//command response does not have "\r\n" after "OK"
+    /*if (at_obj_exec_cmd(device->client, resp, "AT+ZTURNOFF") != RT_EOK)
+    {
+        LOG_D("power off fail.");
+        at_delete_resp(resp);
+        return(-RT_ERROR);
+    }*/
+    
+    at_delete_resp(resp);
+    
+    me3616 = (struct at_device_me3616 *)device->user_data;
+    me3616->power_status = RT_FALSE;
+    
+    LOG_D("power off success.");
+    
+    return(RT_EOK);
+}
+
+static int me3616_sleep(struct at_device *device)
+{
+    at_response_t resp = RT_NULL;
+    struct at_device_me3616 *me3616 = RT_NULL;
+    
+    me3616 = (struct at_device_me3616 *)device->user_data;
+    if ( ! me3616->power_status)//power off
+    {
+        return(RT_EOK);
+    }
+    if (me3616->sleep_status)//is sleep status 
+    {
+        return(RT_EOK);
+    }
+    
+    resp = at_create_resp(64, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return(-RT_ERROR);
+    }
+    
+    if (at_obj_exec_cmd(device->client, resp, "AT+CPSMS=1,,,\"00111110\",\"00000001\"") != RT_EOK)
+    {
+        LOG_D("enable sleep fail.");
+        at_delete_resp(resp);
+        return(-RT_ERROR);
+    }
+
+    #if ME3616_DEEP_SLEEP_EN
+    if (at_obj_exec_cmd(device->client, resp, "AT+ZSLR") != RT_EOK)
+    {
+        LOG_D("startup entry into sleep fail.");
+        at_delete_resp(resp);
+        return(-RT_ERROR);
+    }
+    #endif
+    
+    at_delete_resp(resp);
+    me3616->sleep_status = RT_TRUE;
+    
+    LOG_D("sleep success.");
+    
+    return(RT_EOK);
+}
+
+static int me3616_wakeup(struct at_device *device)
+{
+    at_response_t resp = RT_NULL;
+    struct at_device_me3616 *me3616 = RT_NULL;
+
+    me3616 = (struct at_device_me3616 *)device->user_data;
+    if ( ! me3616->power_status)//power off
+    {
+        LOG_E("the power is off and the wake-up cannot be performed");
+        return(-RT_ERROR);
+    }
+    if ( ! me3616->sleep_status)//no sleep status
+    {
+        return(RT_EOK);
+    }
+    
+    resp = at_create_resp(64, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return(-RT_ERROR);
+    }
+    
+    #if ME3616_DEEP_SLEEP_EN
+    if (me3616->power_pin != -1)
+    {
+        rt_pin_write(me3616->power_pin, PIN_HIGH);
+        rt_thread_mdelay(100);
+        rt_pin_write(me3616->power_pin, PIN_LOW);
+        rt_thread_mdelay(200);
+    }
+    #endif
+    
+    if (at_obj_exec_cmd(device->client, resp, "AT+CPSMS=0") != RT_EOK)
+    {
+        LOG_D("wake up fail.");
+        at_delete_resp(resp);
+        return(-RT_ERROR);
+    }
+    
+    at_delete_resp(resp);
+    me3616->sleep_status = RT_FALSE;
+    
+    LOG_D("wake up success.");
+    
+    return(RT_EOK);
+}
+
+static int me3616_check_link_status(struct at_device *device)
+{
+    at_response_t resp = RT_NULL;
+    struct at_device_me3616 *me3616 = RT_NULL;
+    int result = -RT_ERROR;
+
+    RT_ASSERT(device);
+
+    me3616 = (struct at_device_me3616 *)device->user_data;
+    if ( ! me3616->power_status)//power off
+    {
+        LOG_D("the power is off.");
+        return(-RT_ERROR);
+    }
+    
+    #if ME3616_DEEP_SLEEP_EN
+    if (me3616->sleep_status)//is sleep status
+    {
+        if (me3616->power_pin != -1)
+        {
+            rt_pin_write(me3616->power_pin, PIN_HIGH);
+            rt_thread_mdelay(100);
+            rt_pin_write(me3616->power_pin, PIN_LOW);
+            rt_thread_mdelay(200);
+        }
+    }
+    #endif
+    
+    resp = at_create_resp(64, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return(-RT_ERROR);
+    }
+
+    result = -RT_ERROR;
+    if (at_obj_exec_cmd(device->client, resp, "AT+CGREG?") == RT_EOK)
+    {
+        int link_stat = 0;
+        if (at_resp_parse_line_args_by_kw(resp, "+CGREG:", "+CGREG: %*d,%d", &link_stat) > 0)
+        {
+            if (link_stat == 1 || link_stat == 5)
+            {
+                result = RT_EOK;
+            }
+        }
+    }
+    
+    #if ME3616_DEEP_SLEEP_EN
+    if (me3616->sleep_status)//is sleep status
+    {
+        if (at_obj_exec_cmd(device->client, resp, "AT+ZSLR") != RT_EOK)
+        {
+            LOG_D("startup entry into sleep fail.");
+        }
+    }
+    #endif
+    
+    at_delete_resp(resp);
+    
+    return(result);
+}
+
+
+/* =============================  me3616 network interface operations ============================= */
+/* set me3616 network interface device status and address information */
+static int me3616_netdev_set_info(struct netdev *netdev)
+{
+#define ME3616_INFO_RESP_SIZE      128
+#define ME3616_INFO_RESP_TIMO      rt_tick_from_millisecond(300)
+
+    int result = RT_EOK;
+    ip_addr_t addr;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(netdev);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    /* set network interface device status */
+    netdev_low_level_set_status(netdev, RT_TRUE);
+    netdev_low_level_set_link_status(netdev, RT_TRUE);
+    netdev_low_level_set_dhcp_status(netdev, RT_TRUE);
+
+    resp = at_create_resp(ME3616_INFO_RESP_SIZE, 0, ME3616_INFO_RESP_TIMO);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        result = -RT_ENOMEM;
+        goto __exit;
+    }
+
+    /* set network interface device hardware address(IMEI) */
+    {
+        #define ME3616_NETDEV_HWADDR_LEN   8
+        #define ME3616_IMEI_LEN            15
+
+        char imei[ME3616_IMEI_LEN] = {0};
+        int i = 0, j = 0;
+
+        /* send "AT+GSN" commond to get device IMEI */
+        if (at_obj_exec_cmd(device->client, resp, "AT+GSN") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        if (at_resp_parse_line_args(resp, 2, "%s", imei) <= 0)
+        {
+            LOG_E("%s device prase \"AT+GSN\" cmd error.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        LOG_D("%s device IMEI number: %s", device->name, imei);
+
+        netdev->hwaddr_len = ME3616_NETDEV_HWADDR_LEN;
+        /* get hardware address by IMEI */
+        for (i = 0, j = 0; i < ME3616_NETDEV_HWADDR_LEN && j < ME3616_IMEI_LEN; i++, j+=2)
+        {
+            if (j != ME3616_IMEI_LEN - 1)
+            {
+                netdev->hwaddr[i] = (imei[j] - '0') * 10 + (imei[j + 1] - '0');
+            }
+            else
+            {
+                netdev->hwaddr[i] = (imei[j] - '0');
+            }
+        }
+    }
+
+    /* set network interface device IP address */
+    {
+        #define IP_ADDR_SIZE_MAX    16
+        char ipaddr[IP_ADDR_SIZE_MAX] = {0};
+        
+        /* send "AT+CGPADDR=1" commond to get IP address */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CGPADDR=1") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* parse response data "+CGPADDR: 1,<IP_address>" */
+        if (at_resp_parse_line_args_by_kw(resp, "+CGPADDR:", "+CGPADDR: %*d,\"%s\"", ipaddr) <= 0)
+        {
+            LOG_E("%s device \"AT+CGPADDR=1\" cmd error.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        LOG_D("%s device IP address: %s", device->name, ipaddr);
+
+        /* set network interface address information */
+        inet_aton(ipaddr, &addr);
+        netdev_low_level_set_ipaddr(netdev, &addr);
+    }
+    
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static void me3616_check_link_status_entry(void *parameter)
+{
+#define ME3616_LINK_DELAY_TIME    (60 * RT_TICK_PER_SECOND)
+
+    rt_bool_t is_link_up;
+    struct at_device *device = RT_NULL;
+    struct netdev *netdev = (struct netdev *) parameter;
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", netdev->name);
+        return;
+    }
+    
+    while (1)
+    {
+        is_link_up = (me3616_check_link_status(device) == RT_EOK);
+
+        netdev_low_level_set_link_status(netdev, is_link_up);
+
+        rt_thread_delay(ME3616_LINK_DELAY_TIME);
+    }
+}
+
+static int me3616_netdev_check_link_status(struct netdev *netdev)
+{
+#define ME3616_LINK_THREAD_TICK           20
+#define ME3616_LINK_THREAD_STACK_SIZE     (1024 + 512)
+#define ME3616_LINK_THREAD_PRIORITY       (RT_THREAD_PRIORITY_MAX - 2)
+
+    rt_thread_t tid;
+    char tname[RT_NAME_MAX] = {0};
+
+    RT_ASSERT(netdev);
+
+    rt_snprintf(tname, RT_NAME_MAX, "%s", netdev->name);
+
+    /* create me3616 link status polling thread  */
+    tid = rt_thread_create(tname, me3616_check_link_status_entry, (void *)netdev,
+                           ME3616_LINK_THREAD_STACK_SIZE, ME3616_LINK_THREAD_PRIORITY, ME3616_LINK_THREAD_TICK);
+    if (tid != RT_NULL)
+    {
+        rt_thread_startup(tid);
+    }
+
+    return RT_EOK;
+}
+
+static int me3616_net_init(struct at_device *device);
+
+static int me3616_netdev_set_up(struct netdev *netdev)
+{
+    struct at_device *device = RT_NULL;
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_FALSE)
+    {
+        me3616_net_init(device);
+        device->is_init = RT_TRUE;
+
+        netdev_low_level_set_status(netdev, RT_TRUE);
+        LOG_D("network interface device(%s) set up status.", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+static int me3616_netdev_set_down(struct netdev *netdev)
+{
+    struct at_device *device = RT_NULL;
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_TRUE)
+    {
+        me3616_power_off(device);
+        device->is_init = RT_FALSE;
+
+        netdev_low_level_set_status(netdev, RT_FALSE);
+        LOG_D("network interface device(%s) set down status.", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+#ifdef NETDEV_USING_PING
+static int me3616_netdev_ping(struct netdev *netdev, const char *host,
+        size_t data_len, uint32_t timeout, struct netdev_ping_resp *ping_resp)
+{
+#define ME3616_PING_RESP_SIZE       256
+#define ME3616_PING_IP_SIZE         16
+#define ME3616_PING_TIMEO           (10 * RT_TICK_PER_SECOND)
+
+    rt_err_t result = RT_EOK;
+    int response = -1, recv_data_len, ping_time, ttl;
+    char ip_addr[ME3616_PING_IP_SIZE] = {0};
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(netdev);
+    RT_ASSERT(host);
+    RT_ASSERT(ping_resp);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(ME3616_PING_RESP_SIZE, 0, ME3616_PING_TIMEO);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create");
+        return -RT_ENOMEM;
+    }
+
+    if (at_obj_exec_cmd(device->client, resp, "AT+EDNS=\"%s\"", host) != RT_EOK)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "IPV4:", "IPV4:%s\r", ip_addr) <= 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    at_resp_set_info(resp, ME3616_PING_RESP_SIZE, 8, timeout);
+
+    /* send "AT+PING=<host>[-l/L <p_size>] [-n/N <count>][-w/W <time>][-6][-i <value>][-d<value>] */
+    if (at_obj_exec_cmd(device->client, resp, "AT+PING=%s -d 1 -n 1 -w %d", ip_addr, timeout) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "received=", "%*[^=]=%d%*[^=]=%d%*[^=]=%d", 
+                                        &recv_data_len, &ping_time, &ttl) <= 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    inet_aton(ip_addr, &(ping_resp->ip_addr));
+    ping_resp->data_len = recv_data_len;
+    ping_resp->ticks = ping_time;
+    ping_resp->ttl = ttl;
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+#endif /* NETDEV_USING_PING */
+
+const struct netdev_ops me3616_netdev_ops =
+{
+    me3616_netdev_set_up,
+    me3616_netdev_set_down,
+
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+
+#ifdef NETDEV_USING_PING
+    me3616_netdev_ping,
+    RT_NULL,
+#endif
+    RT_NULL,
+};
+
+static struct netdev *me3616_netdev_add(const char *netdev_name)
+{
+#define ETHERNET_MTU        1500
+#define HWADDR_LEN          8
+    struct netdev *netdev = RT_NULL;
+
+    netdev = (struct netdev *)rt_calloc(1, sizeof(struct netdev));
+    if (netdev == RT_NULL)
+    {
+        LOG_E("no memory for netdev create.");
+        return RT_NULL;
+    }
+
+    netdev->mtu = ETHERNET_MTU;
+    netdev->ops = &me3616_netdev_ops;
+    netdev->hwaddr_len = HWADDR_LEN;
+
+#ifdef SAL_USING_AT
+    extern int sal_at_netdev_set_pf_info(struct netdev *netdev);
+    /* set the network interface socket/netdb operations */
+    sal_at_netdev_set_pf_info(netdev);
+#endif
+
+    netdev_register(netdev, netdev_name, RT_NULL);
+
+    return netdev;
+}
+
+/* =============================  me3616 device operations ============================= */
+
+/* initialize for me3616 */
+static void me3616_init_thread_entry(void *parameter)
+{
+#define INIT_RETRY                     5
+#define CPIN_RETRY                     5
+#define CSQ_RETRY                      20
+#define CGREG_RETRY                    60
+#define IPADDR_RETRY                   10
+
+    int i;
+    int retry_num = INIT_RETRY;
+    rt_err_t result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = (struct at_device *) parameter;
+    struct at_client *client = device->client;
+
+    resp = at_create_resp(256, 0, rt_tick_from_millisecond(500));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return;
+    }
+
+    LOG_D("start init %s device.", device->name);
+
+    while (retry_num--)
+    {
+        /* power on the me3616 device */
+        me3616_power_on(device);
+        rt_thread_mdelay(2000);
+
+        /* wait me3616 startup finish, send AT every 500ms, if receive OK, SYNC success*/
+        if (at_client_obj_wait_connect(client, ME3616_WAIT_CONNECT_TIME))
+        {
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+        
+        /* disable echo */
+        if (at_obj_exec_cmd(device->client, resp, "ATE0") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        /* disable PSM mode  */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CPSMS=0") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* disable eDRX mode  */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CEDRXS=0") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* disable low power mode  */
+        if (at_obj_exec_cmd(device->client, resp, "AT+ESOSETRPT=1") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }  
+        
+        /* disable sleep function  */
+        if (at_obj_exec_cmd(device->client, resp, "AT+ZSLR=0") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        } 
+        
+        /* Get the baudrate */
+        if (at_obj_exec_cmd(device->client, resp, "AT+IPR?") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        at_resp_parse_line_args_by_kw(resp, "+IPR:", "+IPR: %d", &i);
+        LOG_D("%s device baudrate %d", device->name, i);
+        
+        /* get module version */
+        if (at_obj_exec_cmd(device->client, resp, "ATI") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        for (i = 0; i < (int) resp->line_counts - 1; i++)
+        {
+            LOG_D("%s", at_resp_get_line(resp, i + 1));
+        }   
+        
+        /* check SIM card */
+        for (i = 0; i < CPIN_RETRY; i++)
+        {
+            rt_thread_mdelay(1000);
+            if (at_obj_exec_cmd(device->client, resp, "AT+CPIN?") == RT_EOK)
+            {
+                if (at_resp_get_line_by_kw(resp, "READY") != RT_NULL)
+                    break;
+            }
+        }
+        if (i == CPIN_RETRY)
+        {
+            LOG_E("%s device SIM card detection failed.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* check signal strength */
+        for (i = 0; i < CSQ_RETRY; i++)
+        {
+            rt_thread_mdelay(1000);
+            if (at_obj_exec_cmd(device->client, resp, "AT+CSQ") == RT_EOK)
+            {
+                int signal_strength = 0, err_rate = 0;
+                
+                if (at_resp_parse_line_args_by_kw(resp, "+CSQ:", "+CSQ: %d,%d", &signal_strength, &err_rate) > 0)
+                {
+                    if ((signal_strength != 99) && (signal_strength != 0))
+                    {
+                        LOG_D("%s device signal strength: %d, channel bit error rate: %d",
+                                device->name, signal_strength, err_rate);
+                        break;
+                    }
+                }
+            }
+        }
+        if (i == CSQ_RETRY)
+        {
+            LOG_E("%s device signal strength check failed", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+                
+        /* check the GPRS network is registered */
+        for (i = 0; i < CGREG_RETRY; i++)
+        {
+            rt_thread_mdelay(1000);
+            if (at_obj_exec_cmd(device->client, resp, "AT+CGREG?") == RT_EOK)
+            {
+                int link_stat = 0;
+                
+                if (at_resp_parse_line_args_by_kw(resp, "+CGREG:", "+CGREG: %*d,%d", &link_stat) > 0)
+                {
+                    if ((link_stat == 1) || (link_stat == 5))
+                    {
+                        LOG_D("%s device GPRS is registered", device->name);
+                        break;
+                    }
+                }
+            }
+        }
+        if (i == CGREG_RETRY)
+        {
+            LOG_E("%s device GPRS is register failed", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        /* check the GPRS network IP address */
+        for (i = 0; i < IPADDR_RETRY; i++)
+        {
+            rt_thread_mdelay(1000);
+            if (at_obj_exec_cmd(device->client, resp, "AT+CGPADDR=1") == RT_EOK)
+            {
+                #define IP_ADDR_SIZE_MAX    16
+                char ipaddr[IP_ADDR_SIZE_MAX] = {0};
+                
+                /* parse response data "+CGPADDR: 1,<IP_address>" */
+                if (at_resp_parse_line_args_by_kw(resp, "+CGPADDR:", "+CGPADDR: %*d,%s", ipaddr) > 0)
+                {
+                    LOG_D("%s device IP address: %s", device->name, ipaddr);
+                    break;
+                }
+            }
+        }
+        if (i == IPADDR_RETRY)
+        {
+            LOG_E("%s device GPRS is get IP address failed", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        /* initialize successfully  */
+        result = RT_EOK;
+        break;
+
+    __exit:
+        if (result != RT_EOK)
+        {
+            /* power off the me3616 device */
+            me3616_power_off(device);
+            rt_thread_mdelay(1000);
+
+            LOG_I("%s device initialize retry...", device->name);
+        }
+    }
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    if (result == RT_EOK)
+    {
+        /* set network interface device status and address information */
+        me3616_netdev_set_info(device->netdev);
+        /* check and create link staus sync thread  */
+        if (rt_thread_find(device->netdev->name) == RT_NULL)
+        {
+            me3616_netdev_check_link_status(device->netdev);
+        }
+
+        LOG_I("%s device network initialize success.", device->name);
+    }
+    else
+    {
+        LOG_E("%s device network initialize failed(%d).", device->name, result);
+    }
+}
+
+/* me3616 device network initialize */
+static int me3616_net_init(struct at_device *device)
+{
+#ifdef AT_DEVICE_ME3616_INIT_ASYN
+    rt_thread_t tid;
+
+    tid = rt_thread_create("me3616_net", me3616_init_thread_entry, (void *)device,
+                           ME3616_THREAD_STACK_SIZE, ME3616_THREAD_PRIORITY, 20);
+    if (tid)
+    {
+        rt_thread_startup(tid);
+    }
+    else
+    {
+        LOG_E("create %s device init thread failed.", device->name);
+        return -RT_ERROR;
+    }
+#else
+    me3616_init_thread_entry(device);
+#endif /* AT_DEVICE_ME3616_INIT_ASYN */
+
+    return RT_EOK;
+}
+
+static int me3616_init(struct at_device *device)
+{
+    struct at_device_me3616 *me3616 = RT_NULL;
+
+    RT_ASSERT(device);
+
+    me3616 = (struct at_device_me3616 *) device->user_data;
+    me3616->power_status = RT_FALSE;//default power is off.
+    me3616->sleep_status = RT_FALSE;//default sleep is disabled.
+
+    /* initialize AT client */
+    at_client_init(me3616->client_name, me3616->recv_line_num);
+
+    device->client = at_client_get(me3616->client_name);
+    if (device->client == RT_NULL)
+    {
+        LOG_E("get AT client(%s) failed.", me3616->client_name);
+        return -RT_ERROR;
+    }
+
+    /* register URC data execution function  */
+#ifdef AT_USING_SOCKET
+    me3616_socket_init(device);
+#endif
+
+    /* add me3616 device to the netdev list */
+    device->netdev = me3616_netdev_add(me3616->device_name);
+    if (device->netdev == RT_NULL)
+    {
+        LOG_E("add netdev(%s) failed.", me3616->device_name);
+        return -RT_ERROR;
+    }
+
+    /* initialize me3616 pin configuration */
+    if (me3616->power_pin != -1)
+    {
+        rt_pin_write(me3616->power_pin, PIN_LOW);
+        rt_pin_mode(me3616->power_pin, PIN_MODE_OUTPUT);
+    }
+
+    /* initialize me3616 device network */
+    return me3616_netdev_set_up(device->netdev);
+}
+
+static int me3616_deinit(struct at_device *device)
+{
+    RT_ASSERT(device);
+    
+    return me3616_netdev_set_down(device->netdev);
+}
+
+static int me3616_control(struct at_device *device, int cmd, void *arg)
+{
+    int result = -RT_ERROR;
+
+    RT_ASSERT(device);
+
+    switch (cmd)
+    {
+    case AT_DEVICE_CTRL_SLEEP:
+        result = me3616_sleep(device);
+        break;
+    case AT_DEVICE_CTRL_WAKEUP:
+        result = me3616_wakeup(device);
+        break;
+    case AT_DEVICE_CTRL_POWER_ON:
+    case AT_DEVICE_CTRL_POWER_OFF:
+    case AT_DEVICE_CTRL_RESET:
+    case AT_DEVICE_CTRL_LOW_POWER:
+    case AT_DEVICE_CTRL_NET_CONN:
+    case AT_DEVICE_CTRL_NET_DISCONN:
+    case AT_DEVICE_CTRL_SET_WIFI_INFO:
+    case AT_DEVICE_CTRL_GET_SIGNAL:
+    case AT_DEVICE_CTRL_GET_GPS:
+    case AT_DEVICE_CTRL_GET_VER:
+        LOG_W("not support the control command(%d).", cmd);
+        break;
+    default:
+        LOG_E("input error control command(%d).", cmd);
+        break;
+    }
+
+    return result;
+}
+
+const struct at_device_ops me3616_device_ops =
+{
+    me3616_init,
+    me3616_deinit,
+    me3616_control,
+};
+
+static int me3616_device_class_register(void)
+{
+    struct at_device_class *class = RT_NULL;
+
+    class = (struct at_device_class *) rt_calloc(1, sizeof(struct at_device_class));
+    if (class == RT_NULL)
+    {
+        LOG_E("no memory for device class create.");
+        return -RT_ENOMEM;
+    }
+
+    /* fill me3616 device class object */
+#ifdef AT_USING_SOCKET
+    me3616_socket_class_register(class);
+#endif
+    class->device_ops = &me3616_device_ops;
+
+    return at_device_class_register(class, AT_DEVICE_CLASS_ME3616);
+}
+INIT_DEVICE_EXPORT(me3616_device_class_register);
+
+#endif /* AT_DEVICE_USING_ME3616 */
+
diff --git a/class/me3616/at_device_me3616.h b/class/me3616/at_device_me3616.h
new file mode 100644
index 0000000..a93ed87
--- /dev/null
+++ b/class/me3616/at_device_me3616.h
@@ -0,0 +1,71 @@
+/*
+ * File      : at_device_me3616.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-12-30     qiyongzhong     first version
+ */
+
+#ifndef __AT_DEVICE_ME3616_H__
+#define __AT_DEVICE_ME3616_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+
+#include <at_device.h>
+
+/* The maximum number of sockets supported by the me3616 device */
+#define AT_DEVICE_ME3616_SOCKETS_NUM  5
+
+struct at_device_me3616
+{
+    char *device_name;
+    char *client_name;
+
+    int power_pin;
+    int power_status_pin;
+    size_t recv_line_num;
+    struct at_device device;
+
+    void *socket_data;
+    void *user_data;
+    
+    rt_bool_t power_status;
+    rt_bool_t sleep_status;
+};
+
+#ifdef AT_USING_SOCKET
+
+/* me3616 device socket initialize */
+int me3616_socket_init(struct at_device *device);
+
+/* me3616 device class socket register */
+int me3616_socket_class_register(struct at_device_class *class);
+
+#endif /* AT_USING_SOCKET */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __AT_DEVICE_ME3616_H__ */
+
diff --git a/class/me3616/at_socket_me3616.c b/class/me3616/at_socket_me3616.c
new file mode 100644
index 0000000..9c42422
--- /dev/null
+++ b/class/me3616/at_socket_me3616.c
@@ -0,0 +1,594 @@
+/*
+ * File      : at_socket_me3616.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-12-30     qiyongzhong  first version
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <at_device_me3616.h>
+
+#define LOG_TAG                        "at.skt.me3616"
+#include <at_log.h>
+
+#if defined(AT_DEVICE_USING_ME3616) && defined(AT_USING_SOCKET)
+
+#define ME3616_MODULE_SEND_MAX_SIZE       512
+
+static int me3616_socket_fd[AT_DEVICE_ME3616_SOCKETS_NUM] = {0};
+
+static at_evt_cb_t at_evt_cb_set[] = {
+        [AT_SOCKET_EVT_RECV] = NULL,
+        [AT_SOCKET_EVT_CLOSED] = NULL,
+};
+
+static int me3616_get_socket_idx(int sock)
+{
+    int i;
+    
+    if (sock < 0)
+    {
+        return(-1);
+    }
+    
+    for (i=0; i<AT_DEVICE_ME3616_SOCKETS_NUM; i++)
+    {
+        if (me3616_socket_fd[i] == sock)
+            return(i);
+    }
+
+    return(-1);
+}
+
+/**
+ * close socket by AT commands.
+ *
+ * @param current socket
+ *
+ * @return  0: close socket success
+ *         -1: send AT commands error
+ *         -2: wait socket event timeout
+ *         -5: no memory
+ */
+static int me3616_socket_close(struct at_socket *socket)
+{
+    int result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int) socket->user_data;
+    struct at_device *device = (struct at_device *) socket->device;
+
+    if (me3616_socket_fd[device_socket] == -1)
+    {
+        return RT_EOK;
+    }
+    
+    resp = at_create_resp(64, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    result = at_obj_exec_cmd(device->client, resp, "AT+ESOCL=%d", me3616_socket_fd[device_socket]);
+    me3616_socket_fd[device_socket] = -1;
+    
+    at_delete_resp(resp);
+
+    return result;
+}
+
+/**
+ * create TCP/UDP client or server connect by AT commands.
+ *
+ * @param socket current socket
+ * @param ip server or client IP address
+ * @param port server or client port
+ * @param type connect socket type(tcp, udp)
+ * @param is_client connection is client
+ *
+ * @return   0: connect success
+ *          -1: connect failed, send commands error or type error
+ *          -2: wait socket event timeout
+ *          -5: no memory
+ */
+static int me3616_socket_connect(struct at_socket *socket, char *ip, int32_t port,
+    enum at_socket_type type, rt_bool_t is_client)
+{
+    #define CONN_RESP_SIZE  128
+    
+    int type_code = 0;
+    int result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int) socket->user_data;
+    struct at_device *device = (struct at_device *) socket->device;
+    int sock = -1;
+
+    RT_ASSERT(ip);
+    RT_ASSERT(port >= 0);
+
+    if ( ! is_client)
+    {
+        return -RT_ERROR;
+    }
+
+    switch(type)
+    {
+        case AT_SOCKET_TCP:
+            type_code = 1;
+            break;
+        case AT_SOCKET_UDP:
+            type_code = 2;
+            break;
+        default:
+            LOG_E("%s device socket(%d)  connect type error.", device->name, device_socket);
+            return -RT_ERROR;
+    }
+
+    resp = at_create_resp(CONN_RESP_SIZE, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    if (me3616_socket_fd[device_socket] != -1)
+    {
+        at_obj_exec_cmd(device->client, resp, "AT+ESOCL=%d", me3616_socket_fd[device_socket]);
+        me3616_socket_fd[device_socket] = -1;
+    }
+    
+    if (at_obj_exec_cmd(device->client, resp, "AT+ESOC=1,%d,1", type_code) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "+ESOC=", "+ESOC=%d", &sock) <= 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    at_resp_set_info(resp, CONN_RESP_SIZE, 0, (45*RT_TICK_PER_SECOND));
+    if (at_obj_exec_cmd(device->client, resp, "AT+ESOCON=%d,%d,\"%s\"", sock, port, ip) < 0)
+    {
+        at_resp_set_info(resp, CONN_RESP_SIZE, 0, rt_tick_from_millisecond(300));
+        at_obj_exec_cmd(device->client, resp, "AT+ESOCL=%d", sock);
+        result = -RT_ERROR;
+        goto __exit;
+    }
+    
+    me3616_socket_fd[device_socket] = sock;
+    
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static int at_get_send_size(struct at_socket *socket, size_t *nacked)
+{
+    int result = 0;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int) socket->user_data;
+    struct at_device *device = (struct at_device *) socket->device;
+    int remain_size;
+
+    resp = at_create_resp(64, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.", device->name);
+        return -RT_ENOMEM;
+    }
+
+    if (at_obj_exec_cmd(device->client, resp, "AT+ESOTCPBUF=%d", me3616_socket_fd[device_socket]) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "+ESOTCPBUF=", "+ESOTCPBUF=%d", &remain_size) <= 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    *nacked = 4096 - remain_size;
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static int at_wait_send_finish(struct at_socket *socket, rt_tick_t timeout)
+{
+    rt_tick_t last_time = rt_tick_get();
+    size_t nacked = 0xFFFF;
+
+    while (rt_tick_get() - last_time <= timeout)
+    {
+        at_get_send_size(socket, &nacked);
+        if (nacked == 0)
+        {
+            return RT_EOK;
+        }
+        rt_thread_mdelay(50);
+    }
+
+    return -RT_ETIMEOUT;
+}
+
+/**
+ * send data to server or client by AT commands.
+ *
+ * @param socket current socket
+ * @param buff send buffer
+ * @param bfsz send buffer size
+ * @param type connect socket type(tcp, udp)
+ *
+ * @return >=0: the size of send success
+ *          -1: send AT commands error or send data error
+ *          -2: waited socket event timeout
+ *          -5: no memory
+ */
+static int me3616_socket_send(struct at_socket *socket, const char *buff, size_t bfsz, enum at_socket_type type)
+{
+    #define SEND_RESP_SIZE      128
+    
+    int result = 0;
+    size_t cur_pkt_size = 0, sent_size = 0;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int) socket->user_data;
+    struct at_device *device = (struct at_device *) socket->device;
+    rt_mutex_t lock = device->client->lock;
+
+    RT_ASSERT(buff);
+
+    resp = at_create_resp(SEND_RESP_SIZE, 2, RT_TICK_PER_SECOND/2);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    rt_mutex_take(lock, RT_WAITING_FOREVER);
+
+    while (sent_size < bfsz)
+    {
+        if (bfsz - sent_size < ME3616_MODULE_SEND_MAX_SIZE)
+        {
+            cur_pkt_size = bfsz - sent_size;
+        }
+        else
+        {
+            cur_pkt_size = ME3616_MODULE_SEND_MAX_SIZE;
+        }
+
+        at_resp_set_info(resp, SEND_RESP_SIZE, 2, RT_TICK_PER_SECOND/2);
+        if (at_obj_exec_cmd(device->client, resp, "AT+ESOSENDRAW=%d,%d", me3616_socket_fd[device_socket], (int)cur_pkt_size) < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        if (at_resp_get_line_by_kw(resp, "CONNECT") == RT_NULL)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        rt_thread_mdelay(5);//delay at least 4 ms
+        
+        /* send the real data to server or client */
+        result = (int) at_client_obj_send(device->client, buff + sent_size, cur_pkt_size);
+        if (result == 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* wait respone "NO CARRIER ... OK " */
+        at_resp_set_info(resp, SEND_RESP_SIZE, 0, (2*RT_TICK_PER_SECOND));
+        if (at_obj_exec_cmd(device->client, resp, "") < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        if (type == AT_SOCKET_TCP)
+        {
+            at_wait_send_finish(socket, (5*RT_TICK_PER_SECOND));
+        }
+        else
+        {
+            rt_thread_mdelay(10);//delay at least 10 ms
+        }
+        
+        sent_size += cur_pkt_size;
+    }
+
+__exit:
+
+    rt_mutex_release(lock);
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result > 0 ? sent_size : result;
+}
+
+/**
+ * domain resolve by AT commands.
+ *
+ * @param name domain name
+ * @param ip parsed IP address, it's length must be 16
+ *
+ * @return  0: domain resolve success
+ *         -1: send AT commands error or response error
+ *         -2: wait socket event timeout
+ *         -5: no memory
+ */
+static int me3616_domain_resolve(const char *name, char ip[16])
+{
+    int result;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(name);
+    RT_ASSERT(ip);
+
+    device = at_device_get_first_initialized();
+    if (device == RT_NULL)
+    {
+        LOG_E("get first init device failed.");
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(128, 0, (15 * RT_TICK_PER_SECOND));
+    if (!resp)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    result = at_obj_exec_cmd(device->client, resp, "AT+EDNS=\"%s\"", name);
+    if (result != RT_EOK)
+    {
+        LOG_E("%s device \"AT+EDNS=\"%s\"\" cmd error.", device->name, name);
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "IPV4:", "IPV4:%s\r", ip) <= 0)
+    {
+        LOG_E("%s device prase \"AT+EDNS=\"%s\"\" cmd error.", device->name, name);
+        result = -RT_ERROR;
+        goto __exit;
+    }
+    
+    ip[15] = 0;
+    if (rt_strlen(ip) < 8)
+    {
+        result = -RT_ERROR;
+    }
+    else
+    {
+        result = RT_EOK;
+    }
+
+ __exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+/**
+ * set AT socket event notice callback
+ *
+ * @param event notice event
+ * @param cb notice callback
+ */
+static void me3616_socket_set_event_cb(at_socket_evt_t event, at_evt_cb_t cb)
+{
+    if (event < sizeof(at_evt_cb_set) / sizeof(at_evt_cb_set[1]))
+    {
+        at_evt_cb_set[event] = cb;
+    }
+}
+
+static void urc_close_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int sock = -1;
+    int err_code = 0;
+    int device_socket = 0;
+    struct at_socket *socket = RT_NULL;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", client_name);
+        return;
+    }
+
+    sscanf(data, "+ESOERR=%d,%d", &sock, &err_code);
+    
+    device_socket = me3616_get_socket_idx(sock);
+    if (device_socket < 0 || err_code < 0 || err_code > 4)
+    {
+        return;
+    }
+    
+    /* get at socket object by device socket descriptor */
+    socket = &(device->sockets[device_socket]);
+
+    /* notice the socket is disconnect by remote */
+    if (at_evt_cb_set[AT_SOCKET_EVT_CLOSED])
+    {
+        at_evt_cb_set[AT_SOCKET_EVT_CLOSED](socket, AT_SOCKET_EVT_CLOSED, NULL, 0);
+    }
+}
+
+static void urc_recv_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int sock = -1;
+    int device_socket = 0;
+    rt_int32_t timeout;
+    rt_size_t bfsz = 0, temp_size = 0;
+    char *recv_buf = RT_NULL, temp[8] = {0};
+    struct at_socket *socket = RT_NULL;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", client_name);
+        return;
+    }
+
+    sscanf(data, "+ESONMI=%d,", &sock);
+    device_socket = me3616_get_socket_idx(sock);
+    if (device_socket < 0)
+    {
+        return;
+    }
+
+    while(temp_size < sizeof(temp))
+    {
+        at_client_obj_recv(client, temp+temp_size, 1, 10);
+        if ( *(temp+temp_size) == ',')
+        {
+            *(temp+temp_size) = 0;
+            break;
+        }
+        temp_size++;
+    }
+    if (temp_size == sizeof(temp))
+    {
+        return;
+    }
+    
+    sscanf(temp, "%d", (int *)&bfsz);
+    if(bfsz == 0)
+    {
+        return;
+    }
+    
+    timeout = bfsz > 10 ? bfsz : 10;
+
+    recv_buf = (char *) rt_calloc(1, bfsz);
+    if (recv_buf == RT_NULL)
+    {
+        LOG_E("no memory for URC receive buffer(%d).", bfsz);
+        /* read and clean the coming data */
+        temp_size = 0;
+        while (temp_size < bfsz)
+        {
+            if (bfsz - temp_size > sizeof(temp))
+            {
+                at_client_obj_recv(client, temp, sizeof(temp), timeout);
+            }
+            else
+            {
+                at_client_obj_recv(client, temp, bfsz - temp_size, timeout);
+            }
+            temp_size += sizeof(temp);
+        }
+        return;
+    }
+
+    if (at_client_obj_recv(client, recv_buf, bfsz, timeout) != bfsz)
+    {
+        LOG_E("%s device receive size(%d) data failed.", device->name, bfsz);
+        rt_free(recv_buf);
+        return;
+    }
+
+    /* read end "\r\n" */
+    at_client_obj_recv(client, temp, 2, 5);
+
+    /* get at socket object by device socket descriptor */
+    socket = &(device->sockets[device_socket]);
+
+    /* notice the receive buffer and buffer size */
+    if (at_evt_cb_set[AT_SOCKET_EVT_RECV])
+    {
+        at_evt_cb_set[AT_SOCKET_EVT_RECV](socket, AT_SOCKET_EVT_RECV, recv_buf, bfsz);
+    }
+}
+
+static const struct at_urc urc_table[] =
+{
+    {"+ESOERR=",    "\r\n",                 urc_close_func},
+    {"+ESONMI=",    ",",                    urc_recv_func},
+};
+
+static const struct at_socket_ops me3616_socket_ops =
+{
+    me3616_socket_connect,
+    me3616_socket_close,
+    me3616_socket_send,
+    me3616_domain_resolve,
+    me3616_socket_set_event_cb,
+};
+
+int me3616_socket_init(struct at_device *device)
+{
+    RT_ASSERT(device);
+
+    rt_memset(me3616_socket_fd, -1, sizeof(me3616_socket_fd));
+
+    /* register URC data execution function  */
+    at_obj_set_urc_table(device->client, urc_table, sizeof(urc_table) / sizeof(urc_table[0]));
+
+    return RT_EOK;
+}
+
+int me3616_socket_class_register(struct at_device_class *class)
+{
+    RT_ASSERT(class);
+
+    class->socket_num = AT_DEVICE_ME3616_SOCKETS_NUM;
+    class->socket_ops = &me3616_socket_ops;
+
+    return RT_EOK;
+}
+
+#endif /* AT_DEVICE_USING_ME3616 && AT_USING_SOCKET */
+
diff --git a/samples/at_sample_me3616.c b/samples/at_sample_me3616.c
new file mode 100644
index 0000000..f47ef3e
--- /dev/null
+++ b/samples/at_sample_me3616.c
@@ -0,0 +1,53 @@
+/*
+ * File      : at_sample_me3616.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2019-12-30     qiyongzhong       first version
+ */
+
+#include <at_device_me3616.h>
+
+#define LOG_TAG                        "at.sample.me3616"
+#include <at_log.h>
+
+#define ME3616_SAMPLE_DEIVCE_NAME        "me3616"
+
+static struct at_device_me3616 _dev =
+{
+    ME3616_SAMPLE_DEIVCE_NAME,
+    ME3616_SAMPLE_CLIENT_NAME,
+
+    ME3616_SAMPLE_POWER_PIN,
+    ME3616_SAMPLE_STATUS_PIN,
+    ME3616_SAMPLE_RECV_BUFF_LEN,
+};
+
+static int me3616_device_register(void)
+{
+    struct at_device_me3616 *me3616 = &_dev;
+
+    return at_device_register(&(me3616->device),
+                              me3616->device_name,
+                              me3616->client_name,
+                              AT_DEVICE_CLASS_ME3616,
+                              (void *) me3616);
+}
+INIT_APP_EXPORT(me3616_device_register);
+