465 lines
20 KiB
C
465 lines
20 KiB
C
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/*
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* 这个例程适用于不支持通过pthread函数在主线程外开独立的固件下载线程的设备
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* 它演示了用SDK配置MQTT参数并建立连接, 并在接收到OTA的mqtt消息后开始下载升级固件的过程
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* 同时, 它演示了如何将固件的大小分为两半, 每次下载一半的做法. 用户可以进一步将固件分成更多更小的分段
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*
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* 需要用户关注或修改的部分, 已用 `TODO` 在注释中标明
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*
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*/
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/* TODO: 本例子用到了sleep函数, 所以包含了unistd.h. 如果用户自己的库中有可以替代的函数, 则可以将unistd.h替换掉
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*
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* 本例子用到了malloc/free函数, 所以用到了stdlib.h, 用户如果自己库中有可以替代的函数, 则需要将stdlib.h替换掉
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "aiot_state_api.h"
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#include "aiot_sysdep_api.h"
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#include "aiot_mqtt_api.h"
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#include "aiot_ota_api.h"
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#include "cm_mem.h"
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/* TODO: 替换为自己设备的三元组 */
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char *product_key = "${YourProductKey}";
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char *device_name = "${YourDeviceName}";
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char *device_secret = "${YourDeviceSecret}";
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/*
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TODO: 替换为自己实例的接入点
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对于企业实例, 或者2021年07月30日之后（含当日）开通的物联网平台服务下公共实例
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mqtt_host的格式为"${YourInstanceId}.mqtt.iothub.aliyuncs.com"
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其中${YourInstanceId}: 请替换为您企业/公共实例的Id
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对于2021年07月30日之前（不含当日）开通的物联网平台服务下公共实例
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需要将mqtt_host修改为: mqtt_host = "${YourProductKey}.iot-as-mqtt.${YourRegionId}.aliyuncs.com"
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其中, ${YourProductKey}：请替换为设备所属产品的ProductKey。可登录物联网平台控制台，在对应实例的设备详情页获取。
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${YourRegionId}：请替换为您的物联网平台设备所在地域代码, 比如cn-shanghai等
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该情况下完整mqtt_host举例: a1TTmBPIChA.iot-as-mqtt.cn-shanghai.aliyuncs.com
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详情请见: https://help.aliyun.com/document_detail/147356.html
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*/
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char *mqtt_host = "${YourInstanceId}.mqtt.iothub.aliyuncs.com";
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/* 位于external/ali_ca_cert.c中的服务器证书 */
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extern const char *ali_ca_cert;
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void *g_ota_handle = NULL;
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void *g_dl_handle = NULL;
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uint32_t g_firmware_size = 0;
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/* 位于portfiles/aiot_port文件夹下的系统适配函数集合 */
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extern aiot_sysdep_portfile_t g_aiot_sysdep_portfile;
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/* TODO: 如果要关闭日志, 就把这个函数实现为空, 如果要减少日志, 可根据code选择不打印
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*
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* 例如: [1578463098.611][LK-0309] pub: /ota/device/upgrade/a13FN5TplKq/ota_demo
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*
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* 上面这条日志的code就是0309(十六进制), code值的定义见core/aiot_state_api.h
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*
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*/
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/* 日志回调函数, SDK的日志会从这里输出 */
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int32_t demo_state_logcb(int32_t code, char *message)
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{
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/* 下载固件的时候会有大量的HTTP收包日志, 通过code筛选出来关闭 */
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if (STATE_HTTP_LOG_RECV_CONTENT != code) {
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printf("%s", message);
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}
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return 0;
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}
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/* MQTT事件回调函数, 当网络连接/重连/断开时被触发, 事件定义见core/aiot_mqtt_api.h */
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void demo_mqtt_event_handler(void *handle, const aiot_mqtt_event_t *const event, void *userdata)
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{
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switch (event->type) {
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/* SDK因为用户调用了aiot_mqtt_connect()接口, 与mqtt服务器建立连接已成功 */
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case AIOT_MQTTEVT_CONNECT: {
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printf("AIOT_MQTTEVT_CONNECT\r\n");
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/* TODO: 处理SDK建连成功, 不可以在这里调用耗时较长的阻塞函数 */
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}
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break;
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/* SDK因为网络状况被动断连后, 自动发起重连已成功 */
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case AIOT_MQTTEVT_RECONNECT: {
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printf("AIOT_MQTTEVT_RECONNECT\r\n");
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/* TODO: 处理SDK重连成功, 不可以在这里调用耗时较长的阻塞函数 */
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}
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break;
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/* SDK因为网络的状况而被动断开了连接, network是底层读写失败, heartbeat是没有按预期得到服务端心跳应答 */
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case AIOT_MQTTEVT_DISCONNECT: {
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char *cause = (event->data.disconnect == AIOT_MQTTDISCONNEVT_NETWORK_DISCONNECT) ? ("network disconnect") :
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("heartbeat disconnect");
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printf("AIOT_MQTTEVT_DISCONNECT: %s\r\n", cause);
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/* TODO: 处理SDK被动断连, 不可以在这里调用耗时较长的阻塞函数 */
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}
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break;
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default: {
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}
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}
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}
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/* MQTT默认消息处理回调, 当SDK从服务器收到MQTT消息时, 且无对应用户回调处理时被调用 */
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void demo_mqtt_default_recv_handler(void *handle, const aiot_mqtt_recv_t *const packet, void *userdata)
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{
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switch (packet->type) {
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case AIOT_MQTTRECV_HEARTBEAT_RESPONSE: {
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printf("heartbeat response\r\n");
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/* TODO: 处理服务器对心跳的回应, 一般不处理 */
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}
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break;
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case AIOT_MQTTRECV_SUB_ACK: {
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printf("suback, res: -0x%04X, packet id: %d, max qos: %d\r\n",
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-packet->data.sub_ack.res, packet->data.sub_ack.packet_id, packet->data.sub_ack.max_qos);
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/* TODO: 处理服务器对订阅请求的回应, 一般不处理 */
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}
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break;
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case AIOT_MQTTRECV_PUB: {
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printf("pub, qos: %d, topic: %.*s\r\n", packet->data.pub.qos, packet->data.pub.topic_len, packet->data.pub.topic);
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printf("pub, payload: %.*s\r\n", packet->data.pub.payload_len, packet->data.pub.payload);
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/* TODO: 处理服务器下发的业务报文 */
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}
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break;
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case AIOT_MQTTRECV_PUB_ACK: {
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printf("puback, packet id: %d\r\n", packet->data.pub_ack.packet_id);
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/* TODO: 处理服务器对QoS1上报消息的回应, 一般不处理 */
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}
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break;
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default: {
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}
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}
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}
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/* 下载收包回调, 用户调用 aiot_download_recv() 后, SDK收到数据会进入这个函数, 把下载到的数据交给用户 */
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/* TODO: 一般来说, 设备升级时, 会在这个回调中, 把下载到的数据写到Flash上 */
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void user_download_recv_handler(void *handle, const aiot_download_recv_t *packet, void *userdata)
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{
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int32_t percent = 0;
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int32_t last_percent = 0;
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uint32_t data_buffer_len = 0;
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/* 目前只支持 packet->type 为 AIOT_DLRECV_HTTPBODY 的情况 */
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if (!packet || AIOT_DLRECV_HTTPBODY != packet->type) {
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return;
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}
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percent = packet->data.percent;
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/* 如果 percent 为负数, 说明发生了收包异常或者digest校验错误 */
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if (percent < 0) {
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/* digest校验错误 */
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printf("exception happend, percent is %d\r\n", percent);
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if (userdata) {
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cm_free(userdata);
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}
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return;
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}
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/* userdata可以存放 demo_download_recv_handler() 的不同次进入之间, 需要共享的数据 */
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/* 这里用来存放上一次进入本回调函数时, 下载的固件进度百分比 */
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if (userdata) {
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last_percent = *((uint32_t *)(userdata));
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}
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data_buffer_len = packet->data.len;
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/*
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* TODO: 下载一段固件成功, 这个时候, 用户应该将
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* 起始地址为 packet->data.buffer, 长度为 packet->data.len 的内存, 保存到flash上
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*
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* 如果烧写flash失败, 还应该调用 aiot_download_report_progress(handle, -4) 将失败上报给云平台
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* 备注:协议中, 与云平台商定的错误码在 aiot_ota_protocol_errcode_t 类型中, 例如
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* -1: 表示升级失败
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* -2: 表示下载失败
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* -3: 表示校验失败
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* -4: 表示烧写失败
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*
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* 详情可见 https://help.aliyun.com/document_detail/85700.html
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*/
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/* percent 入参的值为 100 时, 说明SDK已经下载固件内容全部完成 */
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if (percent == 100) {
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/* 上报版本号 */
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/*
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* TODO: 这个时候, 一般用户就应该完成所有的固件烧录, 保存当前工作, 重启设备, 切换到新的固件上启动了
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* 并且, 新的固件必须要以
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*
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* aiot_ota_report_version(g_ota_handle, new_version);
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*
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* 这样的操作, 将升级后的新版本号(比如1.0.0升到1.1.0, 则new_version的值是"1.1.0")上报给云平台
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* 云平台收到了新的版本号上报后, 才会判定升级成功, 否则会认为本次升级失败了
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*
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*/
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}
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/* 简化输出, 只有距离上次的下载进度增加5%以上时, 才会打印进度, 并向服务器上报进度 */
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if (percent - last_percent >= 5 || percent == 100) {
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printf("download %03d%% done, +%d bytes\r\n", percent, data_buffer_len);
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aiot_download_report_progress(handle, percent);
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if (userdata) {
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*((uint32_t *)(userdata)) = percent;
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}
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if (percent == 100 && userdata) {
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cm_free(userdata);
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}
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}
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}
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/* 用户通过 aiot_ota_setopt() 注册的OTA消息处理回调, 如果SDK收到了OTA相关的MQTT消息, 会自动识别, 调用这个回调函数 */
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void user_ota_recv_handler(void *ota_handle, aiot_ota_recv_t *ota_msg, void *userdata)
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{
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switch (ota_msg->type) {
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case AIOT_OTARECV_FOTA: {
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uint16_t port = 443;
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uint32_t max_buffer_len = 2048;
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aiot_sysdep_network_cred_t cred;
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void *dl_handle = NULL;
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void *last_percent = NULL;
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if (NULL == ota_msg->task_desc || ota_msg->task_desc->protocol_type != AIOT_OTA_PROTOCOL_HTTPS) {
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break;
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}
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dl_handle = aiot_download_init();
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if (NULL == dl_handle) {
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break;
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}
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last_percent = cm_malloc(sizeof(uint32_t));
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if (NULL == last_percent) {
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aiot_download_deinit(&dl_handle);
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break;
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}
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memset(last_percent, 0, sizeof(uint32_t));
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printf("OTA target firmware version: %s, size: %u Bytes\r\n", ota_msg->task_desc->version,
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ota_msg->task_desc->size_total);
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if (NULL != ota_msg->task_desc->extra_data) {
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printf("extra data: %s\r\n", ota_msg->task_desc->extra_data);
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}
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g_firmware_size = ota_msg->task_desc->size_total;
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memset(&cred, 0, sizeof(aiot_sysdep_network_cred_t));
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cred.option = AIOT_SYSDEP_NETWORK_CRED_SVRCERT_CA;
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cred.max_tls_fragment = 16384;
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cred.x509_server_cert = ali_ca_cert;
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cred.x509_server_cert_len = strlen(ali_ca_cert);
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uint32_t end = g_firmware_size / 2;
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/* 设置下载时为TLS下载 */
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if ((STATE_SUCCESS != aiot_download_setopt(dl_handle, AIOT_DLOPT_NETWORK_CRED, (void *)(&cred)))
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/* 设置下载时访问的服务器端口号 */
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|| (STATE_SUCCESS != aiot_download_setopt(dl_handle, AIOT_DLOPT_NETWORK_PORT, (void *)(&port)))
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/* 设置下载的任务信息, 通过输入参数 ota_msg 中的 task_desc 成员得到, 内含下载地址, 固件大小, 固件签名等 */
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|| (STATE_SUCCESS != aiot_download_setopt(dl_handle, AIOT_DLOPT_TASK_DESC, (void *)(ota_msg->task_desc)))
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/* 设置下载内容到达时, SDK将调用的回调函数 */
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|| (STATE_SUCCESS != aiot_download_setopt(dl_handle, AIOT_DLOPT_RECV_HANDLER, (void *)(user_download_recv_handler)))
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/* 设置单次下载最大的buffer长度, 每当这个长度的内存读满了后会通知用户 */
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|| (STATE_SUCCESS != aiot_download_setopt(dl_handle, AIOT_DLOPT_BODY_BUFFER_MAX_LEN, (void *)(&max_buffer_len)))
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/* 设置 AIOT_DLOPT_RECV_HANDLER 的不同次调用之间共享的数据, 比如例程把进度存在这里 */
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|
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|| (STATE_SUCCESS != aiot_download_setopt(dl_handle, AIOT_DLOPT_USERDATA, (void *)last_percent))
|
|||
|
|
/* 指明下载方式是按照range下载, 并且当前只下载一半 */
|
|||
|
|
|| (STATE_SUCCESS != aiot_download_setopt(dl_handle, AIOT_DLOPT_RANGE_END, (void *)&end))
|
|||
|
|
/* 发送http的GET请求给http服务器 */
|
|||
|
|
|| (STATE_SUCCESS != aiot_download_send_request(dl_handle))) {
|
|||
|
|
aiot_download_deinit(&dl_handle);
|
|||
|
|
cm_free(last_percent);
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
g_dl_handle = dl_handle;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
default:
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
int main(int argc, char *argv[])
|
|||
|
|
{
|
|||
|
|
int32_t res = STATE_SUCCESS;
|
|||
|
|
void *mqtt_handle = NULL;
|
|||
|
|
uint16_t port = 443; /* 无论设备是否使用TLS连接阿里云平台, 目的端口都是443 */
|
|||
|
|
aiot_sysdep_network_cred_t cred; /* 安全凭据结构体, 如果要用TLS, 这个结构体中配置CA证书等参数 */
|
|||
|
|
char *cur_version = NULL;
|
|||
|
|
void *ota_handle = NULL;
|
|||
|
|
uint32_t timeout_ms = 0;
|
|||
|
|
|
|||
|
|
/* 配置SDK的底层依赖 */
|
|||
|
|
aiot_sysdep_set_portfile(&g_aiot_sysdep_portfile);
|
|||
|
|
|
|||
|
|
/* 配置SDK的日志输出 */
|
|||
|
|
aiot_state_set_logcb(demo_state_logcb);
|
|||
|
|
|
|||
|
|
/* 创建SDK的安全凭据, 用于建立TLS连接 */
|
|||
|
|
memset(&cred, 0, sizeof(aiot_sysdep_network_cred_t));
|
|||
|
|
cred.option = AIOT_SYSDEP_NETWORK_CRED_SVRCERT_CA; /* 使用RSA证书校验MQTT服务端 */
|
|||
|
|
cred.max_tls_fragment = 16384; /* 最大的分片长度为16K, 其它可选值还有4K, 2K, 1K, 0.5K */
|
|||
|
|
cred.sni_enabled = 1; /* TLS建连时, 支持Server Name Indicator */
|
|||
|
|
cred.x509_server_cert = ali_ca_cert; /* 用来验证MQTT服务端的RSA根证书 */
|
|||
|
|
cred.x509_server_cert_len = strlen(ali_ca_cert); /* 用来验证MQTT服务端的RSA根证书长度 */
|
|||
|
|
|
|||
|
|
/* 创建1个MQTT客户端实例并内部初始化默认参数 */
|
|||
|
|
mqtt_handle = aiot_mqtt_init();
|
|||
|
|
if (mqtt_handle == NULL) {
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* 配置MQTT服务器地址 */
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_HOST, (void *)mqtt_host);
|
|||
|
|
/* 配置MQTT服务器端口 */
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_PORT, (void *)&port);
|
|||
|
|
/* 配置设备productKey */
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_PRODUCT_KEY, (void *)product_key);
|
|||
|
|
/* 配置设备deviceName */
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_DEVICE_NAME, (void *)device_name);
|
|||
|
|
/* 配置设备deviceSecret */
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_DEVICE_SECRET, (void *)device_secret);
|
|||
|
|
/* 配置网络连接的安全凭据, 上面已经创建好了 */
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_NETWORK_CRED, (void *)&cred);
|
|||
|
|
/* 配置MQTT默认消息接收回调函数 */
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_RECV_HANDLER, (void *)demo_mqtt_default_recv_handler);
|
|||
|
|
/* 配置MQTT事件回调函数 */
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_EVENT_HANDLER, (void *)demo_mqtt_event_handler);
|
|||
|
|
|
|||
|
|
/* 与MQTT例程不同的是, 这里需要增加创建OTA会话实例的语句 */
|
|||
|
|
ota_handle = aiot_ota_init();
|
|||
|
|
if (NULL == ota_handle) {
|
|||
|
|
goto exit;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* 用以下语句, 把OTA会话和MQTT会话关联起来 */
|
|||
|
|
aiot_ota_setopt(ota_handle, AIOT_OTAOPT_MQTT_HANDLE, mqtt_handle);
|
|||
|
|
/* 用以下语句, 设置OTA会话的数据接收回调, SDK收到OTA相关推送时, 会进入这个回调函数 */
|
|||
|
|
aiot_ota_setopt(ota_handle, AIOT_OTAOPT_RECV_HANDLER, user_ota_recv_handler);
|
|||
|
|
g_ota_handle = ota_handle;
|
|||
|
|
|
|||
|
|
/* 与服务器建立MQTT连接 */
|
|||
|
|
res = aiot_mqtt_connect(mqtt_handle);
|
|||
|
|
if (res < STATE_SUCCESS) {
|
|||
|
|
printf("aiot_mqtt_connect failed: -0x%04X\r\n\r\n", -res);
|
|||
|
|
printf("please check variables like mqtt_host, produt_key, device_name, device_secret in demo\r\n");
|
|||
|
|
/* 尝试建立连接失败, 销毁MQTT实例, 回收资源 */
|
|||
|
|
goto exit;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* TODO: 非常重要!!!
|
|||
|
|
*
|
|||
|
|
* cur_version 要根据用户实际情况, 改成从设备的配置区获取, 要反映真实的版本号, 而不能像示例这样写为固定值
|
|||
|
|
*
|
|||
|
|
* 1. 如果设备从未上报过版本号, 在控制台网页将无法部署升级任务
|
|||
|
|
* 2. 如果设备升级完成后, 上报的不是新的版本号, 在控制台网页将会显示升级失败
|
|||
|
|
*
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
cur_version = "1.0.0";
|
|||
|
|
/* 演示MQTT连接建立起来之后, 就可以上报当前设备的版本号了 */
|
|||
|
|
res = aiot_ota_report_version(ota_handle, cur_version);
|
|||
|
|
if (res < STATE_SUCCESS) {
|
|||
|
|
printf("report version failed, code is -0x%04X\r\n", -res);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
while (1) {
|
|||
|
|
aiot_mqtt_process(mqtt_handle);
|
|||
|
|
res = aiot_mqtt_recv(mqtt_handle);
|
|||
|
|
|
|||
|
|
if (res == STATE_SYS_DEPEND_NWK_CLOSED) {
|
|||
|
|
sleep(1);
|
|||
|
|
}
|
|||
|
|
if (NULL != g_dl_handle) {
|
|||
|
|
/* 完成固件的接收前, 将mqtt的收包超时调整到100ms, 以减少两次固件下载动作之间的时间间隔 */
|
|||
|
|
int32_t ret = aiot_download_recv(g_dl_handle);
|
|||
|
|
timeout_ms = 100;
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_RECV_TIMEOUT_MS, (void *)&timeout_ms);
|
|||
|
|
|
|||
|
|
/* 本例子中, 将整个固件分为2个等份来下载, 每次下载一半, 第一半下载完成时会进入这个分支 */
|
|||
|
|
if (STATE_DOWNLOAD_RANGE_FINISHED == ret) {
|
|||
|
|
printf("the first half download finished\n");
|
|||
|
|
|
|||
|
|
/* 当第一次下载完成后, 要重新设置range的start/end值, 下载另外一半 */
|
|||
|
|
|
|||
|
|
/*
|
|||
|
|
* 非常重要:
|
|||
|
|
*
|
|||
|
|
* 上一次下载的范围是[0, g_firmware_size/2],
|
|||
|
|
* 因此这一次下载需要从 [g_firmware_size/2 + 1, 固件结束地址],
|
|||
|
|
* 其中固件结束地址填0的话就表示直到下载结束
|
|||
|
|
*
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
uint32_t start = g_firmware_size / 2 + 1;
|
|||
|
|
uint32_t end = 0;
|
|||
|
|
aiot_download_setopt(g_dl_handle, AIOT_DLOPT_RANGE_START, (void *)&start);
|
|||
|
|
/* range_end如果指定为0, 服务器就理解为下载到文件末尾后结束 */
|
|||
|
|
aiot_download_setopt(g_dl_handle, AIOT_DLOPT_RANGE_END, (void *)&end);
|
|||
|
|
/* 向服务器发起下一次下载的请求 */
|
|||
|
|
aiot_download_send_request(g_dl_handle);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* 整个固件下载完成 */
|
|||
|
|
if (ret == STATE_DOWNLOAD_FINISHED) {
|
|||
|
|
printf("down finished all\n");
|
|||
|
|
aiot_download_deinit(&g_dl_handle);
|
|||
|
|
/* 完成固件的接收后, 将mqtt的收包超时调整回到默认值5000ms */
|
|||
|
|
timeout_ms = 5000;
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_RECV_TIMEOUT_MS, (void *)&timeout_ms);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* 下载的内容超出了固件的总大小, 可能是用户把range划分错了, range之间有重叠 */
|
|||
|
|
if (ret == STATE_DOWNLOAD_FETCH_TOO_MANY) {
|
|||
|
|
printf("downloaded more than expeced bytes, please check range start/end settings\n");
|
|||
|
|
aiot_download_deinit(&g_dl_handle);
|
|||
|
|
/* 完成固件的接收后, 将mqtt的收包超时调整回到默认值5000ms */
|
|||
|
|
timeout_ms = 5000;
|
|||
|
|
aiot_mqtt_setopt(mqtt_handle, AIOT_MQTTOPT_RECV_TIMEOUT_MS, (void *)&timeout_ms);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (STATE_DOWNLOAD_RENEWAL_REQUEST_SENT == ret) {
|
|||
|
|
printf("download renewal request has been sent successfully\r\n");
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (ret <= STATE_SUCCESS) {
|
|||
|
|
printf("download failed, error code is %d, try to send renewal request\r\n", ret);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* 断开MQTT连接, 一般不会运行到这里 */
|
|||
|
|
res = aiot_mqtt_disconnect(mqtt_handle);
|
|||
|
|
if (res < STATE_SUCCESS) {
|
|||
|
|
printf("aiot_mqtt_disconnect failed: -0x%04X\r\n", -res);
|
|||
|
|
goto exit;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
exit:
|
|||
|
|
while (1) {
|
|||
|
|
/* 销毁MQTT实例, 一般不会运行到这里 */
|
|||
|
|
res = aiot_mqtt_deinit(&mqtt_handle);
|
|||
|
|
|
|||
|
|
if (res < STATE_SUCCESS) {
|
|||
|
|
printf("aiot_mqtt_deinit failed: -0x%04X\r\n", -res);
|
|||
|
|
return -1;
|
|||
|
|
} else {
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* 销毁OTA实例, 一般不会运行到这里 */
|
|||
|
|
aiot_ota_deinit(&ota_handle);
|
|||
|
|
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|