OPC_TCP_SCHEME is the string "opc. Aug 15, 2016 · Then the above SubHandler will always keep the python object updated and the python object has a dict of it's children in case it needs to write or get more info from UA server. Python OPC-UA latest OPC-UA Server Class; OPC-UA Client Class; High level Functions and Node Class; Subscription Class; opcua package. The project is focused on a simple demonstration of client-server communication via OPC UA. BLE connector to collect data from BLE devices. 0] OPC UA primer - A sample OPC UA server based on open62541 and on a model design XML. LGPL Pure Python OPC-UA Client and Server. Node6 : 9. Subpackages Edit on GitHub; For the core OPC UA specifications the following additional files are published: StatusCode. 110. The logging module follows a "bubble up" strategy which means the logging message will be available to the application using the package. If you want to expose data then the best way to do it currently is to react to internal django events and fill up the UA node with the values you want at that point using write_attrtibute_valuemethod. Python example how Modbus TCP can be translated to OPC UA I have succesfully implemented OPC-DA to OPC-UA wrapper code with python 3. 90. Jul 28, 2015 · Hello. This library also provides a synchronous wrapper over the async API Euromap 77 is about data interchange between Injection Moulding Machines (IMM) and Manufacturing Engineering Systems (MES). ua. Right now, I have set up a subscription handler within the Detector which subscribes to the node value corresponding to the streamed data and retrieves it opcua/ua contains all UA structures from specification, most are autogenerated. Node4 : 0. However, at the end of the simulation, I get an array of invalid pointer as shown below: The same model works perfectly fine without an OPC-UA server. OPC Classic is a pure Windows technology by design, but this library includes a Gateway Server that lets you use OPC Classic on any architecture (Linux, MacOS, Windows, Docker). Most needed functionalities are implemented including subscribing for data changes and events, write variable values listing attributes and references, and call methods. PositiveTrendData : numeric (double) value that increases one unit every 5 seconds. GitHub community articles 🔥 OPC DA Python Library with awesome CLI Free tool to read data from OPC UA/DA sources and send to MS PowerBI using the OData You signed in with another tab or window. If you want to use Python OPC UA like Kepserver you need to write your own driver as a bridge between PLC and OPC UA server. Modbus connector to collect data from Modbus servers and slaves. client. js and the node-opcua package, the Ua Expert opc ua client Softings opc ua client and a c application which uses the open62541 library. OPC-UA implementation is quasi complete OPC UA binary protocol implementation is quasi complete and has been tested against many different OPC UA stacks. The OPC-UA server acts as a client that polls the arduino for its state, or requests it to perform an action (In this example, turning on and off a LED). py: A simple command line tool, to browse and display the Nodes of a OPC UA Server. Jul 3, 2024 · opcua-asyncio is an asyncio-based asynchronous OPC UA client and server based on python-opcua, removing support of python < 3. Bad @ Node3. Socket:ServiceFault from server received while waiting for publish response & opcua. /src/DAServerExcel/" and there run the commands python excel_server. from opcua import Client, ua #from opcua import Subscription. It is easy to mix high level objects and low level UA calls in one application. Something that doesn't add up is that if I open these Nodes (1,2,3) in UAExpert, the Python script is suddenly able to read values for those nodes too (like Node1 above). This library also provides a synchronous wrapper over the async API, which can be used OPC-UA implementation is quasi complete and has been tested against many different OPC-UA stacks. The OPC UA server implementation is pretty much the server sample code provided in GitHub. This is a minimal example to connect to a Phoenix Contact AXC F 2152 PLCnext enabled PLC. sleep(1) count += 0. less need for locks) and can potentially provide performance improvements. 3) to access a Siemens OPC UA server (15xx PLC / TIA). But when I simulate it on the OPC-UA server, I get this error, as shown above. 0 set_security_IDs(policyIDs) Method setting up the security endpoints for identification of clients. ObjectIds. pip install asyncua. FreeOpcUa: Open Source C++ and Python OPC-UA Server and Client Libraries and Tools Download this project as a . opc_server. OPC-UA implementation is quasi complete More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. py from opcua import ua,Server from rando I need to create a folder on an OPC UA-Server. BadSessionIdInvalid: "The session id is not valid. ). gr/), specifically within the Frog IoT project in close cooperation with a team of researchers from Centre of Research and Technology, Hellas's Information Technology Insitute (ITI-CERTH). Subpackages Edit on GitHub; OPC-UA implementation is quasi complete and has been tested against many different OPC-UA stacks. Open Source C++ OPC-UA Server and Client Library. The API offers both a low level interface to send and receive all UA defined structures and high level classes allowing to write a server or a client in a few lines. This step can be skipped if you have your OPC UA server already. The server code is contained in server. OPC UA Transformer - Transforms OPC UA Server address space into RDF data structure [APL-2. By the client (UaExpert V1. by manually splitting the connect sequence in the same way as the Client class would do. So currently I've been working on a project using Python OPCUA, my python coding will act as the client to take data from the existing cloud server. This library also provides a synchronous wrapper over the async API Jul 3, 2024 · opcua-asyncio is an asyncio-based asynchronous OPC UA client and server based on python-opcua, removing support of python < 3. Node7 : False. Resources Contribute to plt-tud/opc_ua_xml_export_client development by creating an account on GitHub. Request connector to collect data from HTTP API. I have its Host name, Server ID, Server IP. opcua/server contains server specific code. Jul 10, 2018 · Hi all, I was wondering if there is any way to list all the available variables to be measured in a given OPC UA Server. I'm new to this forum and my knowledge in Python programming is on beginner level but I'm still trying to improve my python programming language. #. 7. "(BadSessionIdInvalid) Jun 24, 2020 · The foundation released different Nodesets on their github account. class SubHandler(object): # OPC-UA Server data change event handler def datachange_notification(self, node, val, data): print "PDC_MAIN-I-SUBHAND, Data Change Event Handler: ", node, val The server will instantiate a python Device object which has an update method for getting data from Modbus; The Device object subclasses UaObject which will auto subscribe to all children and keep the python class in sync with the OPC UA object; MyDevice links to the modbus driver via parameters from OPC UA, so it can be configued from an HMI Sep 25, 2018 · Hi all, I want to set a Beaglebone Black as a server sending sensor data (right now it's just random numbers) to my laptop over OPC UA and reading it with UA Expert (OPC Client) Here is my server. Contribute to open62541/open62541-python-deprecated development by creating an account on GitHub. Only the combination Python OPC UA Server and WinCC Client does not work. Subpackages Edit on GitHub; Python opcua-asyncio Documentation. 📁 About the project. 9 version with 32 bit. I can create the client without using the certificates and keys without any issues, but when I try and include the security relat OPC client and subscriber code examples using QuickOPC in Object Pascal (Delphi) for OPC Data Access (OPC DA) and OPC Unified Architecture (OPC UA), including OPC UA PubSub. Basically it takes data from a database and creates one OPC UA tag for each row of the results. API offers both a low level interface to send and receive all UA defined structures and high level classes allowing to write a server or a client in a few lines. Bad @ Node2 ua. Object) This will only return other objects not methods or properties of your node. there are gatewaysolutions out there (Kepware, Prosys, ) which can be used to get the data, but Simple OPC-UA GUI client. tcp This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Jan 22, 2020 · Saved searches Use saved searches to filter your results more quickly Jun 16, 2021 · I'm new to OPC UA and am working on a system where a Client ('Sensor') continuously streams data to a Server. py and python excel_client. Sep 16, 2020 · Hi all, I have learnt python for machine learning algorithms (basic level - numpy, scipy, matplotlib, regressions, knn, etc. net 4. BooleanData : boolean variable that flips its state every 10 seconds. Export with username/password python NodeXmlExporter. More than 100 million people use GitHub to discover, fork, and contribute to over 330 million projects. Oct 27, 2021 · Hello! I'm trying to connect to an opc ua server in anonymous mode with Basic256Sha256 + Sign security settings without certificate. ? i dont understand the question! this is OPC UA not OPC A&E (completly different transport protocols), you should search for such COM/DCOM libs in python but as far as i know its bound to windows and is kind of insecure. I also can read in these values with an OPC UA Client. register_to_discovery()' but it always throws an error: Received Python opcua-asyncio Documentation. MatrikonOPC Server for Simulati opcua/ua contains all UA structures from specification, most are autogenerated. Mar 4, 2016 · Hi @joaolrc, Original opcua-asyncio dev here. Variant('C496578A-0DFE-4b8f-870A-745238C6AEAE', ua. All 46 C# 46 Python 41 Java 34 C 24 This Application is an OPC UA Global Discovery Server for certificate management Python OPC-UA latest OPC-UA Server Class; OPC-UA Client Class; High level Functions and Node Class; Subscription Class; opcua package. REST connector to collect FYI: Other OPC UA clients can access the Python OPC UA server and the WinCC client can access other servers. May 30, 2022 · I'm trying to read the data from MySql database to OPC UA server. usage in implementations of OPC UA (GNU GPLv3-licensed More than 100 million people use GitHub to discover, fork, and contribute to over 330 million projects. For example, in OpenOPC there is an option that lets you flatten out the entire tree into leaf nodes, freeing the us LGPL Pure Python OPC-UA Client and Server. opcua/ua contains all UA structures from specification, most are autogenerated. Nov 30, 2019 · if you plan to use a Simatic CP (OPC UA Version) you need to configure it as server or client depending on what you want to do! if i just want just data from the plc, i would configure the CP as a OPC UA Server (look in the siemens manual for the CP). Another Client ('Detector') is then supposed to work with the streamed data. Apr 28, 2020 · The code of the python OPC UA server is attached. connecting and disconnecting in an interval of 5-10s is not wise from my point of view, it would be ok if the sessiontimeout is smaller then the interval! but sessions should not have like less then 30s timeouts, from an security perspective Feb 17, 2019 · Hi all, Recently, i've created a simple server with three objects (Temp, Press, Time) which got random values. I do not know django so I cannot say much about the best way to expoe an UA interface from django. The Unified Architecture Framework (UAF) is an open source software framework to simplify the development of OPC UA applications on Linux and Microsoft Windows, in C++ and Python. I tested it with the following code and sample database it is working. Mar 9, 2023 · Hello all, I have done an OPC UA Server by python library (opcua 0. Jul 3, 2024 · The OPC UA binary protocol implementation has undergone extensive testing with various OPC UA stacks. Python example how Modbus TCP can be translated to OPC UA Sep 9, 2022 · Create an OPC UA server. Therefore, I want to use python-opcua to read in values from some sensors and communicate them over OPC UA. Written using freeopcua python api and pyqt. To make a custom call you need to understand the OPC UA specification very well. In short, the UAF / pyUAF is OPC UA made Jul 3, 2024 · opcua-asyncio is an asyncio-based asynchronous OPC UA client and server based on python-opcua, removing support of python < 3. gz file Hello All, Is it possible to use the library to convert the OPC DA to OPC UA. The firewall was disconnected - all ports are opened. Now, I want to write this data to OPC UA server (prosys , freeopcua server or any other OPC UA server). Mar 31, 2020 · Create a opc server; Create a standard socket server; Save username password as hash somewhere in the server (may be as a json) Client Side. Now I got assigned to work in OPC UA with python coding in it. Reload to refresh your session. Apr 18, 2021 · When I connect to these models using a Python OPC-UA client, it works fine during the simulation. HasChild, nodeclassmask=ua. 0 1,226 853 (13 issues need help) 104 Updated Aug 19, 2024 The funding of node-opcua entirely relies on its users. VariantType. It is interesting that guess type does check for the value being a python datetime object. I recommend using subscription first. With our OPC-UA Exploitation Framework we hope that both software companies and OPC-UA vendors could test their code-base and improve the security of their products. In the next step I need to create a file. This library also provides a synchronous wrapper over the async API, which can be used Oct 13, 2021 · みんなのPython勉強会 #74の発表「PythonによるOPC-UAの利用」で使用したOPC-UAサンプルプログラム。 2021/10/13(水) 19:00 〜 21:00 みんなのPython勉強会#74. Python opcua-asyncio Documentation. Aug 12, 2021 · Regarding getting WARNING:opcua. getChild(NodeId) opcua-asyncio. For running the two applications, please navigate to ". a subsctiption is not bound to a session it can be transfered to another session (but python opcua does not support thtat tbh many devices does not support thtat) so if you close the session the subscription is lost as Jul 14, 2020 · I am fetching data from wincc opc ua server using history_read function and passing parameters in that as per the code attached below this code is working fine. Jan 6, 2020 · Hi, I have been trying to connect a simple OPC UA Server to a Local Discovery Server that is running on my computer. OPC-UA implementation is quasi complete and has been tested against many different OPC-UA stacks. master Python opcua-asyncio Documentation. Nov 24, 2021 · in some products ua servers had issues in the past but its not on our side! typically a session is not bound to a connection so it should be long living. txt. Create a opc client; Create a standard socket client; Send username and password to socket server. _auto. This Python project is designed for industrial data integration, allowing you to connect to a Siemens OPC UA server and store data in a MySQL server. This is a OPC UA Client built in Python which is responsible for reading and writing data on a Siemens PLC S7-1500 OPC UA-Server. tcp". After that, we will use the opcua library’s example script from this LINK. The client application demonstrates, how Python is used to access the data from the server and to put it into an Excel spreadsheet. This library also provides a synchronous wrapper over the async API Mar 20, 2021 · never set sessiontimeout to 0 (a session has to die if nothing happens on the wire) the default from opc foundation is 1 hour. On Fri, Jan 22, 2016, 23:16 Alexander Korolkov notifications@github. Asynchronous programming allows for simpler code (e. Contribute to alexonov/opc development by creating an account on GitHub. However, I&#39;m not sure if it runs in a real time envi First, start an OPC UA testing server which writes a random int value to a variable node every second. Pure Python OPC-UA / IEC 62541 Client and Server for Python 3. The following sample Python script starts the testing server with opc. Jan 22, 2016 · Looks like server sends bad packets. opcua/common contains high level objects and methods used both in server and client. Since the OpenOPC library is only supported by 32 bit python and not with 64 bit. The project consists in an opc_ua client and opc_ua server who will communicate with each other using an OPCUA communication, based of the Python library opcua. [APL-2. A basic implementation will not be that difficult, but reporting every data change to Azure as it's own message will result in a LOT of AMQP messages. g. OPC-UA implementation is quasi complete Dec 4, 2020 · I've been struggling to create an OPC UA client with python's freeopcua and the Prosys UA server simulator. Documenting a project takes time, effort and loads of coffee. This library also provides a synchronous wrapper over the async API, which can be used You signed in with another tab or window. 1331) I can connect at server without problem. get_children(refs=ua. csv - The StatusCodes defined by the OPC UA specification; AttributeIds. OPC-UA connector to collect data from devices that are connected to OPC-UA servers. Nov 3, 2017 · to finish my bachelor thesis, I want to set up an OPC UA Server on a Raspberry Pi 3. python opc opc-ua opc-ua-client opcua opc To associate Jul 19, 2017 · Hello, We are using the python-opcua library (0. This library focuses on having easy to use methods only at the node level. 2. 1) or Machine's Public IP Address to access the OPC UA Server OPC-UA implementation is quasi complete and has been tested against many different OPC-UA stacks. opcua/client contains client specific code. 以下の手順で、必要なパッケージをインストールしておくこと。 This directory contains examples for OPC client and subscriber development in Python. Node5 : 1. We appreciate that, once you have evaluated the software and you have decided to use it in one of your applications, you consider supporting our effort by either financially contributing to one of our sponsor programs: LGPL Pure Python OPC-UA Client and Server. OPC-UA Client event handlers. This library also provides a synchronous wrapper over the async API Open source implementation of OPC UA (OPC Unified Architecture) aka IEC 62541 licensed under Mozilla Public License v2. This directory contains examples for OPC client and subscriber development in Python. csv - The numeric codes assigned to the UNECE units (see Part 8); Oct 17, 2022 · You signed in with another tab or window. Use Arduino IDE to compile and upload server/server. py and the client code is contained in client. The data used are read out from an S7 PLC using different protocols. Requirements Python 3. To start the NodeBrowser, just type the following command: May 6, 2022 · I use the client code to connect to the opc ua server and read the data, but when the network is not good, the connection will be interrupted, resulting in abnormal data reading from opcua import C 一个通用的opc ua客户端类库，基于. Hi, I'm fairly new to OPC UA and was looking into installing a custom DataChangeFilter to receive data even when the value has not changed. thank you for python-opcua MatrikonOPC Server for Simulation is Run in windows2003 python-opc is client that Run in linux the windows2003 ip is 192. py. Jan 21, 2021 · How can get historical alarms over OPC A&E server or from which server . First, we need to install the opcua library. Python wrapper for the open62541 OPC UA SDK. Now I want to read aggregated data from using the function ReadProcessedDetails as per given in OPC UA Specification part aggregate part 13 point no 5. ino to the controller. Next, create the corresponding client to receive this values. If you have a look in here you see how "small" these nodesets are. You signed out in another tab or window. This library also provides a synchronous wrapper over the async API This repository contains code for an OPC UA server and client written in Python. Creating an open endpoint to the server, although encrypted endpoints are enabled. Guid)) Instantiating a Variant with a UUID also will not work because guess_type doesn't check for a UUID. 1创建，基于官方opc ua基金会跨平台库创建，封装了节点读写，批量节点读写，引用读取，特性读取，历史数据读取，方法调用，节点订阅，批量订阅等操作。还提供了一个节点浏览器工具。 - dathlin/OpcUaHelper OPC UA Server written with opcua-asyncio that exposes some nodes for demonstration purposes. zip file Download this project as a tar. The examples cover OPC Data Access (OPC DA), OPC Alarms&Events (OPC A&E), OPC XML, and OPC Unified Architecture (OPC UA) specifications, including OPC UA PubSub. 1. I am trying to connect to remote OPC server. Several European IMM manufacturers together with MES supplyers and guided by VDMA have created this data interchange standard that gives the machines a higher integratability for easier setup and exchange data. add_variable(idx, "MyGuid", ua. These Nodesets are "blueprints" of how the server nodes has to be build up. master Python OPC-UA latest OPC-UA Server Class; OPC-UA Client Class; High level Functions and Node Class; Subscription Class; opcua package. Sep 30, 2021 · I want to have a running Server instance, that has method "add_client(ip)" - after that client instance is created and subscribed on the other (PLC local) Server nodes change. Contribute to FreeOpcUa/python-opcua development by creating an account on GitHub. I receive the the NodeId of new folder which is stored in new_folder_id. Sample implementation of a OPC-UA Server & Client running # Extended OPC UA Gateway ## Overview This software has been developed within the framework of the I4byDesign Competence Center workflow (https://i4bydesign. In order to successfully run the code add the following lines after from opcua import ua, uamethod, Server Jul 3, 2024 · opcua-asyncio is an asyncio-based asynchronous OPC UA client and server based on python-opcua, removing support of python < 3. OPC-UA implementation is quasi complete GitHub is where people build software. NodeClass. It is Open source and free for everyone. Subpackages Edit on GitHub; OpenOPC 2 is a Python Library for OPC DA. opcua/utils contains some utilities function and classes. Do I need to add something to support subscriptions? Many thanks Aug 25, 2020 · Good day Everyone, before I start to ask question. Socket server will decode the hash of username password if it matches, it will return true. the . It takes a few seconds for UAExpert to get Good StatusCode for Jul 3, 2024 · opcua-asyncio is an asyncio-based asynchronous OPC UA client and server based on python-opcua, removing support of python < 3. This library also provides a synchronous wrapper over the async API, which can be used opcua/ua contains all UA structures from specification, most are autogenerated. Sample implementation of a OPC-UA Server & Client running About. I tried three different ways: create the Python server without "load_certificate" and without "load_private_key Security settings in WinCC Client: None / None OPC UA binary protocol implementation has been tested against many different OPC UA stacks. VB. MQTT connector to collect data that is published to external MQTT brokers. Just copy and Python opcua-asyncio Documentation. During server object initialization, The application describes how data can be stored, structured and read out on a local OPC UA server built with Node-Red. Python OPC-UA Documentation, Release 1. Try to have the list of endpoints printed from client code, e. I tried: from opcua import Client client = This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. 98. My class ended up looking like this: This directory contains examples for OPC client and subscriber development in Python. A client/server architecture for communication between a microcontroller and an OPC-UA server. NET and C++/CLI to guide developers using our OPC UA This directory contains examples for OPC client and subscriber development in Python. Both scripts are using Python 3. May 29, 2018 · If you want to read a batch of nodes at one time you have write a custom OPC UA call. This works fine with UaExpert. It allows you to use OPC Classic (OPC Data Access) in modern Python environments. Simple example: while True: time. Node. If An OPC UA server provides data. set_value(round(count)) However, loo More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. Everything is working fine so far, but if we like to access a node which is an array in the security_mode 3 corresponds to SignAndEncrypt, and ua. OPC-UA implementation is quasi complete Jun 8, 2016 · I have asked OPC Foundation for information, however I think the specification is not actually released yet. myguid = myobj. Subpackages Edit on GitHub; opc ua in python. opcua-asyncio. You switched accounts on another tab or window. python library Jul 26, 2017 · objects = root. I use the python asyncua lib. The only way you could connect directly with a PLC is if your PLC has a built in OPC UA client or server. py opc. I don't have the certificate and the server does not need it. All these clients can connect using username and password. This documentation is a work in progress. x Python OPC-UA latest OPC-UA Server Class; OPC-UA Client Class; High level Functions and Node Class; Subscription Class; opcua package. I am completely new to python codes for opc ua protocol to initiate communication between server and client. 5. Then i used wireshark to NodeBrowser. Wireshsrk cannot parse them either. uaerrors. It simplifies the process of retrieving data from industrial machines through OPC UA communication and storing it in a database for analysis and monitoring. 1 myvar. If not, we will use a Python script to create an OPC UA server for testing our connection scripts. 168. In this case, it is a B&R Automation PLC (server), which communicates with the client via the C# or Python application. I have tried it with the function ' RegistrationService. 0. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. Contribute to FreeOpcUa/freeopcua development by creating an account on GitHub. This library also provides a synchronous wrapper over the async API, which can be used Jun 1, 2017 · Well this was my first thought that some security stuff is blocking ops ua, but as wrote I also checked with node. The output you get is because Node doesn't have a real 'ToString()' the i is the id of the node (can also be seen with the GUI client). [MIT] opcua-asyncio. Throughout the package the python logging module is used for logging. if its up and running you can use UAExpert for example to access the OPC UA Server grab the namespace index and the node ids and put it in the Python OPC-UA latest OPC-UA Server Class; OPC-UA Client Class; High level Functions and Node Class; Subscription Class; opcua package. They are supported on Microsoft Windows and Linux. com wrote: Fixed this issue, but reading this value still fails sometimes. ua. I already managed to read in the values and put them on a n OPC UA Server. 7+ and pypy. This endpoint configuration works on most machines, use the loopback address (127. Jan 18, 2016 · This library is only the OPC UA side of things. tcp://localhost:4840, having a variable node MyObject/MyVariable. To familiarize myself with the OPC-UA protocol (and server in the PLC) I tried to connect to the PLC using (almost) its default settings. ua_client. opcua-asyncio is an asyncio-based asynchronous OPC UA client and server based on python-opcua, removing support of python < 3. (I want to have different clients for different PLC OPC-UA servers) This client instance makes it possible to store the data in the DB. Tried to read attribute '10' in FourByteNodeId(i=2258), but the attribute is missing Tried to read attribute '14' in TwoByteNodeId(i=35), but the attribute is missing Tried to read attribute '15' in TwoByteNodeId(i=35), but the attribute is missing Tried to read attribute '16' in TwoByteNodeId(i=35), but the Feb 24, 2020 · First of all thank you for doing such a great work. 13). The cells of the table are opcua-asyncio. There opcua-asyncio. We also welcome other security researchers to use this framework and responsibly disclose vulns/bugs they find to the respective vendors. So if the Foundation is making changes, we wouldn't be able to provide a compatible Version of an OPC UA Server for these newer versions. 0 open62541/open62541’s past year of commit activity C 2,532 MPL-2. OPC UA (OPC Unified Architecture) is the next generation standard for secure, reliable and scalable industrial communication. 6. csv - The identifiers for the Attributes defined by the OPC UA specification; UNECE_to_OPCUA. So, I added "Security Policy" and "Authentic Mar 7, 2018 · Hi, I have written a python program that generates some calculations as output on Terminal. 0] OPC UA for Joining Systems - Test clients and servers based on OPC UA for Joining Systems developed by VDMA Industrial Joining Technologies working group. We are more than happy to get feedback and merge requests relating the documentation. zbyfxxmj gtphk ejzeux urp uyhjje eipas jkdkgqt snk mxiffgc ucnueq