1.检查网络连接:首先需要确保设备和MQTT服务器之间的网络连接是正常的。可以尝试使用ping命令测试设备是否可以到达MQTT服务器的IP地址,检查网络连接是否可达。 2.检查MQTT服务器配置:确保在mqttclient_connect函数中正确配置了MQTT服务器的IP地址、端口号、客户端ID以及其他必要的信息。可能是由于配置错误导致连接失败。 3...
第一步:确认mqttclient_connect返回1的原因 当mqttclient_connect返回1时,意味着MQTT客户端无法连接到MQTT代理服务器。这可能是由于多种原因引起的,包括网络问题、代理服务器配置问题或客户端代码问题。因此,我们需要一步一步排除可能的原因。 第二步:检查网络连接 首先,我们需要检查客户端设备的网络连接是否正常。可以...
‘struct MQTTClient_connectOptions’ has no member named ‘onsuccess5’ 1246 | conn_opts_.onsuccess5 = testiconconnect; 出现这个错误提示,说明在使用的struct MQTTClient_connectOptions结构体中并没有名为onsuccess5的成员。这可能是因为以下几个原因: 版本问题:不同版本的 Eclipse Paho C 客户端库可能会...
E (25417) esp_mqtt_glue: MQTT_EVENT_ERROR E (25417) MQTT_CLIENT: esp_mqtt_connect: mqtt_message_receive() returned -1 E (25423) MQTT_CLIENT: MQTT connect failedgithub-actions bot changed the title MQTT_CLIENT: MQTT connect failed MQTT_CLIENT: MQTT connect failed (MEGH-4406) Mar 4, 20...
注解函数： client.connect(self, host, port, keepalive, bind_address) client.publish(self, topic,...
本文将介绍可能导致mqttclient_connect返回-1的常见原因及解决方法。 一、网络问题 1. 确保服务器地址和端口号正确:首先,请检查您提供的服务器地址和端口号是否正确。确认您正在连接到正确的服务器和端口。 2. 确保网络连接稳定:请检查您的网络连接是否稳定。如果网络不稳定或存在故障,可能导致连接失败。 3. 防火墙...
E (783471) MQTT_CLIENT: esp_mqtt_connect: mqtt_message_receive() returned -1 E (783481) MQTT_CLIENT: MQTT connect failed W (783491) esp_mqtt_glue: MQTT Disconnected. Will try reconnecting in a while... actually, the switch example was working fine some time back but now it is showing...
Hello, I just upgraded paho.mqtt.c but now MQTTClient_connect() is failing with error code -8. What does it mean ? The same code works perfectly before the update. I reinstalled v1.2.1 from the tarball and the issue is gone. Thanks Laurent...
My project is very simple and I had not noticed this change, I am using a NodeMCU ESP8266 board to send the data, but it sends me the error: MQTT client connect attempt failed. Check host, device id, username and password If someone could help me I would be very grateful....
MQTT_CLIENT: Error transport connectby VXavez » Sat Apr 10, 2021 1:35 am Hello guys, I am starting with ESP32 development with IDF. My objective is to create an mqtt client for an IOT project that I am developing. I was trying to run the following example: https://github.com/...