  打开 atcmd_proxy.h 文件，该文件基于atcmd实现了对NBIoT模块(型号为BC260Y)的互操作，并抽象出一系列的接口给上层应用进行集成，接口列表如下：
* AT 指令测试：
```
ATCMD_TEST(on_message, on_timeout, arg)
```
* 获取IMEI：
```
ATCMD_GET_IMEI(on_message, on_timeout, arg)
```
* 检查SIM卡是否正常：
```
ATCMD_CHECK_SIMCARD(on_message, on_timeout, arg)
```
* 获取SIM卡 CIME 码：
```
ATCMD_GET_SIMCARD_CIME(on_message, on_timeout, arg)
```
* 获取SIM卡ICCID码：
```
ATCMD_GET_SIMCARD_ICCID(on_message, on_timeout, arg)
```
* 设置 Band：
```
ATCMD_SET_BAND(n, on_message, on_timeout, arg)
```
* 设置 PSM：
```
ATCMD_SET_PSM(enable, T3412_Step, T3412_Value, T3324_Step, T3324_Value, on_message, on_timeout, arg)
```
* 使能休眠功能：
```
ATCMD_SLEEP_ENABLE(on_message, on_timeout, arg)
```
* 关闭休眠功能：
```
ATCMD_SLEEP_DISABLE(on_message, on_timeout, arg)
```
* 获取 PDP 类型：
```
ATCMD_GET_PDP_TYPE(on_message, on_timeout, arg)
```
* 设置 PDP 类型：
```
ATCMD_SET_PDP_TYPE(type, on_message, on_timeout, arg)
```
* 尝试获取 IP 地址：
```
ATCMD_GET_IP(on_message, on_timeout, arg)
```
* 获取型号强度：
```
ATCMD_GET_LQI(on_message, on_timeout, arg)
```
* 获取网络状态：
```
ATCMD_GET_NWK_STATUS(on_message, on_timeout, arg)
```
* 获取注册状态：
```
ATCMD_GET_REG_STATUS(on_message, on_timeout, arg)
```
* 获取时间：
```
ATCMD_GET_TIME(on_message, on_timeout, arg)
```
* 获取 DNS 地址：
```
ATCMD_GET_DNS_ADDR(on_message, on_timeout, arg)
```
* DNS 解析：
```
ATCMD_DNS_PARSER(domain, on_message, on_timeout, arg)
```
* 创建 UDP 连接：
```
ATCMD_UDP_CONNECT(host, port, on_message, on_timeout, arg)
```
* UDP 发送数据：
```
ATCMD_UDP_PRESEND(len, on_message, on_timeout, arg)
ATCMD_UDP_SEND(data, len, on_message, on_timeout, arg)
```
* 关闭 UDP 连接：
```
ATCMD_UDP_CLOSE(on_message, on_timeout, arg)
```
* MQTT 相关接口：
```
ATCMD_MQTT_OPEN(host, port, on_message, on_timeout, arg)
ATCMD_MQTT_CONNECT(clientId, username, passwd, on_message, on_timeout, arg)
ATCMD_MQTT_SUB(topic, qos, on_message, on_timeout, arg)
ATCMD_MQTT_PRE_SEND(topic, len, on_message, on_timeout, arg)
ATCMD_MQTT_PUB(msg, len, on_message, on_timeout, arg)
ATCMD_MQTT_CONFIG_VERSION(ver, on_message, on_timeout, arg)
ATCMD_MQTT_CLOSE(on_message, on_timeout, arg)
```
* 发送重启命令：
```
ATCMD_RESTART(on_message, on_timeout, arg)
```
<br/>
- 框架介绍
- Main 函数
- HAL 函数接口说明
- hal_system.h
- hal_systick.h
- hal_idt.h
- hal_ioctl.h
- hal_flash.h
- hal_lpm.h
- hal_rtc.h
- hal_iwdg.h
- hal_uart.h
- hal_i2c.h
- hal_led.h
- hal_button.h
- hal_vht2x.h
- hal_lcd.h
- Services 函数接口说明
- svc_system.h
- svc_database.h
- svc_hid.h
- svc_msg.h
- svc_humiture.h
- svc_log.h
- Tasks 说明
- task_system.c
- task_example.c
- Libs 函数接口说明
- mathlib.h
- json.h
- atcmd.h
- atcmd_proxy.h
- libwifi.h
- libs1.h