基于mini2440嵌入式linux上整合一套Domoticz智能家居系统（十一）使用domoticz+mosquitto+Android客户端实现控制STM32板上的LED（二）

本文在前一篇实现了STM32平台利用MQTT协议对接domoticz平台控制LED灯的基础上，完善了网络连接和MQTT的broker连接过程，实现了断网重连功能。

实现部分主要在rt-thread\components\external\paho-mqtt\MQTTClient-C\samples\domoticz\DomoticzThread.c中。

在前一篇的源码基础上稍作改动，如下所示：

DomoticzThread.c：

#include <rtthread.h>
#include "MQTTClient.h"
//#include "led.h"
#include "DomoticzMessageParser.h"

//#define __DEBUG

#ifdef __DEBUG
#include <stdarg.h>
#include <string.h>
static const char *getCurrentFileName()
{
const char *p = strrchr(__FILE__,'\\');
return ++p;
}
#define dprintf(fmt,...) rt_kprintf("%s,line:%d,"fmt,getCurrentFileName(),__LINE__,##__VA_ARGS__)
#else
#define dprintf(fmt,...)
#endif

struct opts_struct
{
char* clientid;
int nodelimiter;
char* delimiter;
enum QoS qos;
char* username;
char* password;
char* host;
int port;
int showtopics;
} opts =
{
(char*)"subscriber on STM32", 0, (char*)"\n", QOS2, NULL, NULL, (char*)"192.168.1.230", 1883, 0
};

int is_over;

void quit_domoticz_thread(void)
{
is_over = 1;
}

//================== Added 2017-Apr-27 8:06:53 start ==================
//处理连接的状态机结构
typedef struct
{
enum{
UNCONNECTED = 0,
NETWORK_CONNECTED=1,
MQTT_CONNECTED=2,
SUBSCRIBING_SUCCESS=3,
WAIT_TIME_OUT=4,
//SUBSCRIBING_FAILURE = 4
}state;

int timeout_s;//超时时间，单位为秒
int times_count;//累计连续尝试连接次数，在连接成功后清零
}Connection_t;

void connect_time_out(void * data)
{
Connection_t* con =(Connection_t*)data;

if(con && con->timeout_s>0)
{
con->timeout_s --;
}
}

#define NETWORK_CONNECT_TIMEOUT 5 //5s
#define MAX_NETWORK_CONNECT_TIMES 5
#define MQTT_CONNECT_TIMEOUT 1 //1s
#define MAX_MQTT_CONNECT_TIMES 5
#define SUBSCRIB_TIMEOUT 1 //1s
#define MAX_SUBSCRIB_TIMES 5
#define MAX_NO_PING_RESPONS_TIMES 10

Connection_t connection={UNCONNECTED,NETWORK_CONNECT_TIMEOUT,0};

//================== Added 2017-Apr-27 8:06:53  end ===================

void messageArrived(MessageData* md)
{
MQTTMessage* message = md->message;

#if 0 /* Commented @ 2017-Apr-23 1:18:29 */
if (opts.showtopics)
rt_kprintf("%.*s\t", md->topicName->lenstring.len, md->topicName->lenstring.data);
if (opts.nodelimiter)
rt_kprintf("%.*s", (int)message->payloadlen, (char*)message->payload);
else
rt_kprintf("%.*s%s", (int)message->payloadlen, (char*)message->payload, opts.delimiter);
#endif /* Commented */
dprintf("payloadlen=%d,%s\n",(int)message->payloadlen,(char*)message->payload);
dprintf("strlen(payload)=%d\n",strlen((char*)message->payload));
//fflush(stdout);
ParseDomoticzMessage((char*)message->payload);

//dprintf("MSG: qos %d, retained %d, dup %d, packetid %d\n", message->qos, message->retained, message->dup, message->id);
}

void set_host(char *host)
{
opts.host = host;
}

void domoticz_thread_entry(void* parameter)
{
int rc = 0;
unsigned char buf[512]={0};//buf[100];
unsigned char readbuf[512]={0};//readbuf[100];

char* topic = "domoticz/out";

Network n;
MQTTClient c;

MQTTPacket_connectData data = MQTTPacket_connectData_initializer;

rt_timer_t timer = rt_timer_create("connect_timer", connect_time_out, &connection, RT_TICK_PER_SECOND, RT_TIMER_FLAG_PERIODIC);
is_over = 0;
rt_kprintf("domoticz_thread_entry\n");

//================== Added 2017-Apr-26 2:36:53 start ==================
RegisterHardware(Create_LED0(),2);
RegisterHardware(Create_LED1(),3);
OpenHardwares();
SetupDomoitczMessageParser();
SetEnableParseItem(KEY_IDX);
SetEnableParseItem(KEY_NVALUE);
SetEnableParseItem(KEY_SWITCH_TYPE);
initHardwareSettings();
//================== Added 2017-Apr-26 2:36:53  end ===================

NetworkInit(&n);

//dprintf("readbuf=%p,readbuf size=%u\n",readbuf,sizeof(readbuf));
data.willFlag = 0;
data.MQTTVersion = 3;
data.clientID.cstring = opts.clientid;
data.username.cstring = opts.username;
data.password.cstring = opts.password;

data.keepAliveInterval = 60;
data.cleansession = 1;

rt_timer_start(timer);
while(!is_over)
{
switch(connection.state)
{
case UNCONNECTED:
if(connection.timeout_s>0)
continue;
rc = NetworkConnect(&n, opts.host, opts.port);
if(rc==0)
{
connection.state = NETWORK_CONNECTED;
connection.times_count = 0;
rt_kprintf("NetworkConnect ok!\n");
rt_kprintf("Connecting to %s:%d\n", opts.host, opts.port);
MQTTClientInit(&c, &n, 1000, buf, sizeof(buf), readbuf, sizeof(readbuf));
}
else if(connection.times_count <MAX_NETWORK_CONNECT_TIMES)
{
connection.times_count++;
connection.timeout_s = NETWORK_CONNECT_TIMEOUT;
}
else
{//reset system cpu,restart
connection.times_count=0;
rt_thread_delay(RT_TICK_PER_SECOND*600);//10分钟后再连
//goto exit;
}
break;
case NETWORK_CONNECTED:
if(connection.timeout_s>0)
continue;
dprintf("\n");
rc = MQTTConnect(&c, &data);
dprintf("\n");
if(rc == SUCCESS)
{
connection.state = MQTT_CONNECTED;
connection.times_count = 0;

rt_kprintf("MQTTConnected!\n");
dprintf("Subscribing to %s\n", topic);
}
else if(connection.times_count <MAX_MQTT_CONNECT_TIMES)
{
rt_kprintf("MQTTConnect times=%d, err:%d! \n",connection.times_count,rc);
connection.times_count++;
connection.timeout_s = MQTT_CONNECT_TIMEOUT;
}
else
{//重新进行network连接
dprintf("\n");
NetworkDisconnect(&n);
connection.state = UNCONNECTED;
connection.times_count=0;
rt_thread_delay(RT_TICK_PER_SECOND*600);//10分钟后再连
}
break;
case MQTT_CONNECTED:
if(connection.timeout_s>0)
continue;
rc = MQTTSubscribe(&c, topic, opts.qos, messageArrived);
if(rc == SUCCESS)
{
rt_kprintf("Subscribed %s\n", topic);
connection.state = SUBSCRIBING_SUCCESS;
connection.times_count = 0;
}
else if(connection.times_count <MAX_SUBSCRIB_TIMES)
{
rt_kprintf("MQTTSubscribe times=%d, err:%d! \n",connection.times_count,rc);
connection.times_count++;
connection.timeout_s = MQTT_CONNECT_TIMEOUT;
}
else
{
//1分钟后重新进行network连接
rt_kprintf("MQTTSubscribe err! reconnect after 1 min\n");
MQTTDisconnect(&c);
NetworkDisconnect(&n);
connection.state = UNCONNECTED;
connection.times_count=0;
rt_thread_delay(RT_TICK_PER_SECOND*60);//1分钟后再连
}
break;
case SUBSCRIBING_SUCCESS:
MQTTYield(&c, 1000);
if(c.ping_outstanding==1)
{
connection.times_count++;
if(connection.times_count>MAX_NO_PING_RESPONS_TIMES)
{
rt_kprintf("network err! reconnecting ...\n");
MQTTDisconnect(&c);
NetworkDisconnect(&n);
connection.state = UNCONNECTED;
connection.times_count = 0;
//rt_thread_delay(RT_TICK_PER_SECOND*60);//1分钟后重连
}
}
else
{
connection.times_count = 0;
}
break;
default:
break;
}

}

exit:
rt_kprintf("Stopping\n");
MQTTDisconnect(&c);
NetworkDisconnect(&n);

rt_timer_delete(timer);

}

void domoticz_thread_init(void)
{
rt_thread_t domoticz_thread;
domoticz_thread = rt_thread_create("DomoticzThread", domoticz_thread_entry, RT_NULL,
0xf00, 28, 10);
if (domoticz_thread != RT_NULL)
rt_thread_startup(domoticz_thread);

}

#ifdef RT_USING_FINSH
#include <finsh.h>
FINSH_FUNCTION_EXPORT(set_host, set domoticz host ip addr);
FINSH_FUNCTION_EXPORT(domoticz_thread_init,to run domoticz thread );
FINSH_FUNCTION_EXPORT(quit_domoticz_thread,quit domoticz thread );
#endif

运行效果：





domoticz这边建立三个LED灯，idx分别为1,2,3

STM32开发板上的LED0的idx为2，LED1的idx为3。

也就是domoticz平台上的“LED灯2”对应开发板LED0；

domoticz平台上的“LED灯3”对应开发板LED1。





好了，现在在STM32开发板上看效果：



1、LED0亮：





2、LED1亮：





3、LED0、LED1都亮：





4、在mini2440板上运行前面做的mqtt客户端程序。

mini2440上也控制两个灯LED0，对应的idx为1；LED1，对应idx为2。

也就是说mini2440板上的LED1和STM32板上的LED0的idx是相同的，看看能不能同时点亮。



点亮mini2440的LED0：





下面将看到在domoticz上点亮LED2灯可以同时点亮mini2440上的LED1和STM32上的LED0：





都点亮：





5、Android手机实际控制效果：

















6、当MQTT的broker被关闭并重新打开后，STM32板的反应：



在程序中，其实只要ping 10次没有结果，就会断开MQTT连接和socket连接，并重新连接。

如果有网络错误，连接不上会，延时一段时间，然后重新连接socket，然后连MQTT的broker，然后订阅。

具体如上述源码中处理那样。

附：STM32开发板的整个源码工程下载地址：

http://download.csdn.net/download/sqshining/9828049