I've implemented a simple MQTT messaging system. with a B4J producer app and an Android consumer app to notify the user of an event.
Just for the record. It is exceptionally simple to get it going. Thnx to all who contributed to the libraries.
Does anyone know how the mobile operators...
Not exactly a tutorial or Android-only, but a hint to the community for those who like playing with home automation stuff, and possibly for others as well. I happened across this very nice device (IMHO): https://www.tindie.com/products/nicethings/hugo-esp8266-4-button-wifi-remote/ and couldn't...
When I log in, my database module returns a map with user data.
I think of ABMaterial as a B4J app and put these data into a Process_Globals variable.
My friend think it is neccessary to put the user data in a session cookie.
Who is right ?
Also I would like to initialize a Mqtt...
Looking for advice, I`ve been trying an app using MQTT over wifi. I have a strong wifi signal all the way out at 600+m (clear line of sight), but I`m losing connection to the MQTT Broker at about 150m?
I`m sending about 10KB on data at a time, and the Broker is responding back with about 2KB of...
Looking for advice, I`ve been trying an app using MQTT over wifi. I have a strong wifi signal at 600+m, but I`m losing connection to the MQTT Broker at about 150m?
I`m sending about 10KB on data at a time, and the Broker is responding back with about 2KB of data. I`m unable to reconnect...
The B4R rMQTT library is based on the well known Arduino PubSubClient library written by Nick O'Leary. It's a subset of this library - with the most important/used methods wrapped. I do have a scenario that requires some of the additional methods to be wrapped as well. Specifically:
I have a question that I am unable to implement in an example so seeking assistance.
I have an mqtt app that is working perfectly fine; and working good in the background until it is killed, so for sure no other messages are being received or sent since the Starter service...
I am now trying the chat MQTT example by Erel, but it shows (on B4A) that a library of MQTT and MQTT broker is missing.
I didn't find any MQTT library for B4A...
Does anybody know how to download the MQTT library for B4A?
Thanks in advance
We have the need for a developer to write a library to communicate with some MQTT based home automation equipment.
Would need to be able to start immediately and have proven experience in writing library’s and communicating with MQTT based equipment.
There is a number of devices we would like to...
sorry for my bad english and also for my basic knowledge about code writing.
I've got a crash on my app using jMQTT library.
I've read by erel that the library haven't update since today because it's stable. In my case the error (quite difficult for me to intercept it) on debug window...
I have a mqtt class for broker connection, send messages and receive messages.
The logic that I use is:
1. Client publish message to topic: "mytopic"
2. In the other side an Script is subscribed to the topic: "mytopic"
3. As soon as the message is received, the script publishes in: "response"...
Imagine an application you want to create for/with 1 million users. What protocol do you use for this volume of connections?
my options for server side are :
WebSocket ( jServer library - b4j )
MQtt ( I run a broker or MqttClient )
Node JS ( my knowledge is weak about it )