Paho MQTT "Unsupported callback API version" error
Feb 12, 2024 · 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 …
Node-red beginners issue. Connection failed to broker: mqtt://
Jun 24, 2023 · 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 …
mqtt - MQTTClient throws error when trying to connect - Stack …
Oct 20, 2024 · 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 …
javascript - mqtt client in html page - Stack Overflow
Dec 17, 2020 · 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 …
esp_wifi.h: No such file or directory ( mqtt_client.h, nvs_flash.h)
Oct 19, 2024 · I am trying to merge my separate SD card and MQTT code in an ESP-IDF project to enable functionality for sending data from the SD card to the cloud via MQTT. Both the SD …
Mosquitto MQTT: "Connection was lost" error when publishing a …
May 5, 2025 · 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 - Mosquitto TLS - Connection Refused: not authorised
Jul 14, 2023 · You shouldn't seperate the listener 8883 line from the entries that contain the cert/key information (and your files do not match the examples). Also edit the question to show …
c# - MQTT Client (MQTTnet) Not Successfully Subscribing to …
Feb 23, 2025 · I'm building a .NET service that connects to an EMQX broker using MQTTnet. While the client connects to EMQX, when I test sending messages through MQTTX (MQTT …
IoT: do I need to use MQTT or HTTP? - Stack Overflow
May 19, 2017 · 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 …
Using MQTTNet, how to subscribe to topic, parse then push back …
Jul 3, 2023 · 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 …