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 …
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 connect to the …
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 …
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 …
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 ensuring that data …
mqtt - Connecting ESP32 IDF MQTT5 Example to HIVEHQ - Stack …
Jul 21, 2024 · 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.
mosquitto-client obtain refused connection - Stack Overflow
I want to use MQTT protocol using mosquitto library. First of all, I want to do some test installing mosquitto-clients sudo apt-get install mosquitto-clients This program provides two "method":
MQTT: Mosquitto Broker and Sparkplug TCK - Stack Overflow
Broker Port: 9001 Broker Endpoint: /mqtt Client Id: tck-web-console Addendum: I was now able to connect the Mosquitto broker to the Sparkplug Test Compatibility Kit via websocket. Unfortunately, …
Can a web browser use MQTT? - Stack Overflow
Apr 16, 2013 · We are looking at using MQTT as the messaging protocol on a new device we're building. We'd also like a web interface for the device. Does anyone know if you can implement a …
How can I queue messages in MQTT? - Stack Overflow
Nov 21, 2020 · 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 …