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 library). I would …
Prevent multiple subscriptions of same topic in HiveMQ MQTT client
Nov 17, 2025 · 0 I'm struggling with my MQTT clients to subscribe to a topic without having the topic subscribed multiple times after the client runs for a while.
How do I subscribe to all topics of a MQTT broker
Oct 2, 2015 · I want to connect a client which will monitor all the topics of the broker to respond to the events when I don't know what are names of topic.
Mosquitto: Starting in local only mode - Stack Overflow
Dec 13, 2020 · Starting with the release of Mosquitto version 2.0.0 (you are running v2.0.2) the default config will only bind to localhost as a move to a more secure default posture. If you want to be able to …
Cannot connecto MQTT from ESP32, using ESPHome config
Apr 4, 2025 · I am learning about MQTT and using ESP8266 with ESPHome, and I am facing a few issues as follows: mqtt: broker: xxxx.s1.eu.hivemq.cloud port: 8883 username: username password: …
mqtt - MQTTClient throws error when trying to connect - Stack Overflow
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 import network …
MQTT WebSocket Connection Failed - Stack Overflow
Oct 25, 2021 · For nearly all MQTT brokers (including mosquitto) you need to configure separate listeners for native MQTT and MQTT over WebSockets. The default port for native MQTT is 1883, …
arduino - Connecting ESP32 to Azure Iot Hub using MQTT over …
Jul 25, 2023 · I am currently doing an internship project and I wish to send MQTT messages from ESP32 to Azure Iot Hub. To set up an initial connection between ESP32 and Azure Iot Hub, I have …
c# - MQTT Client (MQTTnet) Not Successfully Subscribing to Topics ...
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 client tool), my …
mqtt client not connecting to mqtt broker through ip address
May 25, 2022 · I'm new to mqtt protocol. I'm having difficult time connecting my mqtt client (which is connected to another network) with my mqtt broker running on my pc with ip address.