/**
* @brief MQTT协议测试主循环
* @retval None
**/
void MQTT_Loop(void)
{
static int timeout_count = 0;
int publish_state = 0;
int exit = 0;
int j = 0;
/*初始化MQTT上下文，在该api内部配置了设备ID等信息*/
if(MqttSample_Init(smpctx) < 0)
{
return;
}
printf("\r\ndevice id:%s\r\n", MQTT_DEVICE_ID);
printf("we publish topic:%s %s %s\r\n",DS_TO_PUBLISH,DS_TO_PUBLISH_T,DS_TO_PUBLISH_RH);
printf("connect to mqtt server\r\n");
/*发送MQTT连接请求报文*/
MqttSample_CmdConnect(smpctx);
printf("\r\n");
mDelay(2000);
Mqtt_RecvPkt(smpctx->mqttctx);
mDelay(2000);
/*发送MQTT订阅topic报文*/
MqttSample_CmdSubscribe(smpctx);//开机订阅
printf("\r\n");
mDelay(2000);
Mqtt_RecvPkt(smpctx->mqttctx);
printf("begin loop\n");
/*进入主循环*/
while(!exit)
{
j++;
if(j == 3)
{
//MqttSample_CmdPublish(smpctx,TIME_OUT);
/*周期性发布温湿度和一个状态数据，状态每次取反*/
publish_state = MqttSample_CmdPublishNormal(smpctx, TIME_OUT);
if(publish_state < 0)
{
timeout_count++;
if(timeout_count == 5)
{
timeout_count = 0;
/*you can do some thing*/
}
}
j = 0;
}
if(Mqtt_RecvPkt(smpctx->mqttctx)<0)
{
smpctx->publish_state=0;
}
printf("\r\n");
mDelay(100);
}
/*reclaim the resource防止内存泄露*/
MqttBuffer_Destroy(smpctx->mqttbuf);
Mqtt_DestroyContext(smpctx->mqttctx);
printf("bye...\n");
return;
}
static int MqttSample_HandleSocket(struct MqttSampleContext *ctx, uint32_t events)
{
struct epoll_event evt[1];
evt->data.fd = ctx->mqttfd;
evt->events = EPOLLIN;
if(events & EPOLLIN) {
while(1) {
int err;
err = Mqtt_RecvPkt(ctx->mqttctx);
if(MQTTERR_ENDOFFILE == err) {
printf("The connection is disconnected.\n");
close(ctx->mqttfd);
epoll_ctl(ctx->epfd, EPOLL_CTL_DEL, ctx->mqttfd, NULL);
ctx->mqttfd = -1;
return 0;
}
if(MQTTERR_IO == err) {
if((EAGAIN == errno) || (EWOULDBLOCK == errno)) {
break;
}
printf("Send TCP data error: %s.\n", strerror(errno));
return -1;
}
if(MQTTERR_NOERROR != err) {
printf("Mqtt_RecvPkt error is %d.\n", err);
return -1;
}
}
}
if(events & EPOLLOUT) {
if(-1 != ctx->sendedbytes) {
int bytes = Mqtt_SendPkt(ctx->mqttctx, ctx->mqttbuf, ctx->sendedbytes);
if(bytes < 0) {
return -1;
}
else {
ctx->sendedbytes += bytes;
if(ctx->sendedbytes == ctx->mqttbuf->buffered_bytes) {
MqttBuffer_Reset(ctx->mqttbuf);
ctx->sendedbytes = -1;
}
else {
evt->events |= EPOLLOUT;
}
}
}
}
epoll_ctl(ctx->epfd, EPOLL_CTL_MOD, ctx->mqttfd, evt);
return 0;
}
int Recv()
{
return Mqtt_RecvPkt(m_ctx);
}
