tcp

  1. C

    B4J Library Asynchronous modbus TCP master

    Hello everyone, Here a modbus TCP master library, fully programmed in b4j. This library is asynchronous, by use of the asyncstreams and Callback method. The response is an event, a separate sub, different then your sub where you did the request. This has the advantage that an unresponsive...
  2. N

    Android Question Client server application, tcp/ip vs http

    Hi this is a technical cuestion more than a specific cuestion of the language.. Í need to implement an application for android with connection to a server made in visual basic that it will also be implemented by me. The interechange of data between andoid app and server will be in xml format. I...
  3. C

    B4J Code Snippet Modbus TCP server - slave - restricted functionality

    Hello everyone, Here a small quick and dirty implementation of the modbus TCP protocol in B4J as a server / slave. Please note that this is not a complete library! The following limitations are: -Only READING (not writing) of holding registers possible by modbus master(function code 03) from...
  4. walterf25

    B4J Question MQTT accessed from outside

    Hi All, i'm working on a project which requires a device to send data over to a PC. I came across the MQTT library and I thought I would give it a try, i'm really amazed at how simple it is to set this up, whether running the MQTT Broker on a local P.C. or using one of the cloud host servers...
  5. MarkusR

    Android Question Server App with Network & TCP Socket + SSL

    hello, how to make this example b4j network here work with ssl? https://www.b4x.com/android/forum/threads/b4x-network-asyncstreams-b4xserializator.72149/ i set the server into listen after a button click. if me click connect from "client" the server show a connect but the client stay in status...
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