Web Client

The Web Client library allows for communication with a web server via HTTP or HTTPS. The library is appropriate for communication with a REST service.

(A 7 day demo license is available for testing.)

Version: 
1.0.1.6  
Order number: 
2111000025

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Web Client

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Web Client

The CODESYS software package includes a library with function blocks for communicating with a web server via HTTP or HTTPS.


  • The HTTP method GET requests data from a web server.
  • The HTTP methods POST and PUT submit data from the controller to a web server.
  • When using DELETE, data is deleted from a web server.
  • The HTTP method HEAD returns the HTTP header.

The HTTP header of a request can be extended without any restrictions. In addition, function blocks are included for HTTP basic authentication and authentication via OAuth (Version 1a and 2).


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Programming System CODESYS Development System V3.5.13.0
Runtime System CODESYS Control V3.5.13.0
Supported Platforms/ Devices Note: Use the project “Device Reader” to find out the supported features of your device. “Device Reader” is available for free in the CODESYS Store.
Additional Requirements -
Restrictions -
Licensing Workstation license
Required Accessories CODESYS Security Key for CODESYS < 3.5.14.0

Version history

Version Release Notes Release Date
1.0.1.6

New features:


  • New visualizations of the sample projects
  • Uses WebClient 1.0.1.5 (no changes in library)

18.01.2019
1.0.1.5
Min. CODESYS version: 3.5.14.0
New Features:
  • Licensing without dongle

18.12.2018
1.0.1.4
Min. CODESYS version: 3.5.13.0
New Features:
  • Support of SNI (Server Name Indication)

30.07.2018
1.0.1.3
New Features:
  • Support of client certificates
  • http PATCH
  • Bugfixes

19.04.2018
1.0.1.1
New Features:
  • Persistent connections (HTTP 1.1)
  • Queue example

20.02.2018
1.0.1.0 OAuth2 support 19.12.2017
1.0.0.2 Min. CODESYS version: 3.5.10.0 19.09.2017

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