本机部署emqx服务器,mqttfx可以连接上,8266连接显示Failed to connect to MQTT broker, rc=-2 EMQX 错误报告 咨询 zhongwencool 2024 年4 月 23 日 02:20 6 感觉是你的设备网络到不了自己部署的emqx 上。如果不知道在设备端怎么判断的话,可以打开 emqx 的 debug 日志。连一下,看有没有请求过来,没有的话...
本机部署emqx服务器,mqttfx可以连接上,8266连接显示Failed to connect to MQTT broker, rc=-2 EMQX 错误报告 咨询 heeejianbo 2024 年9 月 25 日 03:01 14 帖子问题过于久远了。如果还存在问题 @RuanJ 可以继续往下回复 从你截图的 C 代码看,比较难分析问题 -2 是内部的状态,而且没有任何说明。 这类链接...
Attempting MQTT connection...failed, rc=-2 try again in 5 seconds Attempting MQTT connection...failed, rc=-2 try again in 5 seconds Attempting MQTT connection...failed, rc=-2 try again in 5 seconds Attempting MQTT connection...Connected to aREST.io Attempting MQTT connection...failed, rc...
rc=-2it would make sense that the same error would be issued if the MQTT server had changed IP address or was otherwise uncontactable. Anyone getting that message should probably check that their MQTT server has a fixed IP and/or hostname name that can be resolved to the correct ...
importpaho.mqtt.clientasmqttdefon_connect(client,userdata,flags,rc):ifrc==0:client.publish("test",payload="hello world",qos=0)else:print("connection failed ",rc)mqtt_client=mqtt.Client(client_id="demo_mqtt_pub",clean_session=False)mqtt_client.on_connect=on_connectmqtt_client.conn...
disconnect() def on_connect(client, userdata, flags, rc): if rc == 0: client.publish("test", payload="hello world", qos=1) else: print("connection failed ", rc) mqtt_client = mqtt.Client(client_id="demo_mqtt_pub", clean_session=False) mqtt_client.on_connect = on_...
(2)主题发布功能 在物联网应用中,设备通常会将采集到的数据或状态信息推送到云平台。这一过程通过主题发布实现。在本项目中,开发者可以模拟设备向云平台发布消息,操作步骤包括: 选择主题:用户可以选择一个已有的主题或创建新的主题。 发布消息:通过输入消息内容,模拟设备将数据发布到指定的MQTT主题。
port, &context->bridge->primary_retry_sock, NULL, false); if(rc == 0){ COMPAT_CLOSE(context->bridge->primary_retry_sock); context->bridge->primary_retry_sock = INVALID_SOCKET; context->bridge->primary_retry = 0; net__socket_close(db, context); context->bridge->cur_address = 0; ...
#include"MQTTLiteOS.h"//用来创建线程intThreadStart(Thread*thread,void(*fn)(void*),void*arg){intrc=0;thread=thread;osThreadAttr_tattr;attr.name="MQTTTask";attr.attr_bits=0U;attr.cb_mem=NULL;attr.cb_size=0U;attr.stack_mem=NULL;attr.stack_size=2048;attr.priority=osThreadGetPriority(os...
(); // 清理mosquitto库}void on_connect(int rc){if (rc == 0){std::cout << "连接成功" << std::endl;subscribe(NULL, "/sys/hj1skj***/FZ00**/thing/event/property/post_reply", 0); // 订阅主题subscribe(NULL, "/sys/hj1skj***/FZ00**/thing/event/property/set", 0); // 订...