Paho MQTT "Unsupported callback API version" error
2024年2月12日 · client = mqtt_client.Client(mqtt_client.CallbackAPIVersion.VERSION1, client_id) This will configure the library to use the v1 callback API (as used with older versions of the library). I would …
Node-red beginners issue. Connection failed to broker: mqtt://
2023年6月24日 · Probably not. I have not installed anything extra apart from Node Red. After your reply I tried to install HiveMQ (and upgrade my Java 8 to Java 11). I still didn´t manage to connect to the …
mqtt - MQTTClient throws error when trying to connect - Stack Overflow
2024年10月20日 · I'm devopling an application on a PicoW using Visual Studio (Thonny gives the same results). It uses umqtt.simple: from machine import Pin, I2C from time import sleep import network …
Mosquitto MQTT: "Connection was lost" error when publishing a …
2025年5月5日 · I am trying to test MQTT functionality and have installed Eclipse Mosquitto on my workstation. To subscribe to a topic, I use the following command: "C:\\Program …
mqtt - Connecting ESP32 IDF MQTT5 Example to HIVEHQ - Stack …
2024年7月21日 · From this I could connect the MQTT/SSL project to the Mosquitto broker using SSL. I then returned to my MQTT5 project and added the certificate code etc from the MQTT SSL example.
javascript - mqtt client in html page - Stack Overflow
2020年12月17日 · If you want to connect to a MQTT broker from with a web page you MUST use MQTT over Websockets. The Javascript sandbox in the browser will not allow you to do it any other way. …
Paho-MQTT client disconnect with code 16 and cannot connect again
2023年6月20日 · If I restart the container with the mqtt client, it starts working, but after a few hours it disconnects again (with code 16) with the possibility of reconnecting. I didn't suspend/resume the …
How can I queue messages in MQTT? - Stack Overflow
2020年11月21日 · I am using MQTT in an IoT application. For that purpose each IoT device will publish data to the IoT broker under their Topic and the processing server would subscribe to some wildcards …
IoT: do I need to use MQTT or HTTP? - Stack Overflow
2017年5月19日 · MQTT is intended for situations where your connection may be intermittent or otherwise unreliable. Its various Quality-of-Service levels provide you with significant ways of ensuring …
Using MQTTNet, how to subscribe to topic, parse then push back in a ...
2023年7月3日 · Using MQTTNet, I am not very familiar with async in C# so I need a little bit help. I want to subscribe to a MQTT topic (external broker like mosquitto), parse messages, and for particular …
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