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What is MQTT? "MQTT is a Client Server publish/subscribe messaging transport protocol. It is light weight, open, simple, and designed so as to be easy to implement. These characteristics make it ideal for use in many situations, including constrained environments such as for communication in Machin
link: On top of Erel's comments, I would add the following to explain why MQTT is a superior protocol to WebSockets, at least for IoT applications, multi-cl
link: MQtt.Publish(mytopic, Array As Byte())
link: See the last post: https://www.b4x.-to-internal-libaries.48274/#post-373825

It's time to learn how to use MQTT: https://www.b4x./#content It is simple and powerful. In most cases MQTT is the best solution for low level networks. Low level network means a network solution that is traditionally based on ServerSocket + Socket + AsyncStreams. In this example we implement a cha
link: Finally. Great work Erel
link: lol this is very nice
link: Hi, MQTT Chat could be implemented also within the same network where I have implemented CloudKVS server?

Hi all, This is my very first library :) It implements MQTT standard V3.1.1 MQTT is a lightweight publish/subscribe messaging protocol. for further information see http://mqtt.org/. 32888 Publish/Subscribe The MQTT protocol is based on the principle of publishing messages and subscribing to to
link: Hi JP! My real world messages are published by ESP8266 running NodeMCU. But there is a handy java tool: mqtt-spy. Window/perspectives/detailed allow
link: Sorry JP I did not make it clear. My aim is to add the MQTT code to a service. A timer will be enabled to check if MQTT has a connection and if not t
link: Good job!!! I tested its on ESP8266 (Lua) work OK.

Another GUI which has superior look and feel is available at https://mqttx.app/. With this I was able to connect to my locally running service. It looks like its developed using Electron. 105836 Sadly publicly available MQTT services have not been handshaking so far.
link: Ola My first steps towards IoT. 1. Download Eclipse Mosquitto 2. There are a lot of examples in the forum about coding this, however I needed a GUI
link: Now what? 1. Mosquitto is installed as a service on your windows computer, so go to Services, locate it and start it. It runs on port 1883 I think. T
link: Most cloud-based services for IoT offer MQTT protocol support. One of the best starting points for hobbyists is Adafruit IO, especially if you want to

This forum is for development with B4R. With B4R it is quite simple to use mqtt: https://www.b4x..65669/#content
link: Hello togehter, i have following applecation that send data from an ESP32 board over Wifi to a router (local net without internet access). The route

It depends. Do you need realtime communication? If yes, use AsyncStreams. MQTT has delay about 0,5 to 1 second even in same LAN. But MQTT has a lot of advantages - ready to use authorization and authentication, simple addressing and monitoring. Take a look at jMQTTBrokerExtended library and examples
link: The key words in the sentence above are "local network", in that case you should use Network + AsyncStreams + B4XSerializator. Enjoy...
link: Hi,, i will start my project soon but i'm so confused, the project uses a local network consists of one server and multi clients , the server side rep

You could look into RabbitMQ as well, its meant for a higher bandwidth usage. MQTT is a low bandwidth messaging protocol. I have used MQTT in high bandwidth environments before but it gets sketchy at best.
link: Sub client_MessageArrived (Topic As String, Payload() As Byte) Log("topic: " & Topic) Try Dim receivedObject As Object = serializator.Conv
link: Hi there... in general MQTT "must" have a delay...... some delay... because MQTT using a middle (server/broker) to upload the data/message that stays

That's not correct. MQTT is multithreaded. Never try to create a new thread. Use instead the async SQL methods to add the data to the database.
link: Oh an another advice, if you are planning to have a lot of traffic, Mqtt falls short compared to jserver,
link: MQTT library is based on mosquitto project. and this one is not multithreaded. but most likely if you stick with sql async methods you should be saf
link: I am not sure about mqtt client multithread, but last time I had to create a project like that. I divided it into 2. One for the client that receive

I'm not sure whether this solution runs over the internet or in a local network. If it runs over the internet than a full B4J server will probably be better in the long run.
link: So, I would certainly suggest a B4J solution for the Control Center and the Rasberries. You could add a mobile app (Android/iOS) for your own use to e
link: Hi, I'm going to develop a monitoring system for "indoor advertising" (advertising on tv inside groceries, pharmacies etc.). A mobile Monitoring App

23 MQTT MQTT is a Client Server publish/subscribe messaging transport protocol. It is light weight, open, simple, and designed so as to be easy to implement. These characteristics make it ideal for use in many situations, including constrained environments such as for communication in Machine to Mac

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