Skip to content

gopcua/opcua

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

Artwork by Ashley McNamara
Inspired by Renee French
Taken from https://gopherize.me by Mat Ryer

OPC/UA

A native Go implementation of the OPC/UA Binary Protocol.

We support the current and previous major Go release. See below for a list of Tested Platforms and Supported Features.

GitHub Go Reference License Version

v0.5.x BREAKING CHANGES

  • v0.5.0 released on 14 Aug 2023: all Client methods must have a context
  • v0.5.1 released on 22 Aug 2023: the NewClient function returns an error

In v0.3.0 on 21 Jan 2022 release we added WithContext variants for all methods to avoid a breaking change. All existing methods without a context had a disclaimer that with v0.5.0 their signature would change to include the context and that the WithContext method would be removed.

We missed to update the NewClient function in v0.5.0 which was fixed in v0.5.1.

Please update your code and let us know if there are any issues!

Thank you!

Your GOPCUA Team

Quickstart

# install library
go get -u github.com/gopcua/opcua

# get current date and time 'ns=0;i=2258'
go run examples/datetime/datetime.go -endpoint opc.tcp://localhost:4840

# read the server version
go run examples/read/read.go -endpoint opc.tcp://localhost:4840 -node 'ns=0;i=2261'

# get the current date time using different security and authentication modes
go run examples/crypto/*.go -endpoint opc.tcp://localhost:4840 -cert path/to/cert.pem -key path/to/key.pem -sec-policy Basic256 -sec-mode SignAndEncrypt

# checkout examples/ for more examples...

Sponsors

The gopcua project is sponsored by the following organizations by supporting the active committers to the project:

Northvolt evosoft Intelecy AS

Users

We would also like to list organizations which use gopcua in production:

strateos united manufacturing hub Wolfram Manufacturing Technologies Please open a PR to include your logo here.

Projects using gopcua

gopcua is not only utilized in production environments, but it also serves as a critical component in other larger projects. Here are some projects that rely on gopcua for their functionality:

  • Telegraf: This plugin-driven server agent is used for collecting and sending metrics. It leverages gopcua to extract data from OPC-UA servers and insert it into InfluxDB. Telegraf supports both polling and subscribing methods for data acquisition.
  • benthos-umh: This project is built upon the benthos stream-processing framework. It utilizes gopcua to extract data from OPC-UA servers and forwards the information to MQTT or Kafka brokers. benthos-umh currently supports polling for data collection.

Disclaimer

We are still actively working on this project and the APIs will change.

However, you can safely assume that we are aiming to make the APIs as stable as possible since the code is in use in several large scale production environments.

The Current State was moved to the Wiki.

Your Help is Appreciated

If you are looking for ways to contribute you can

  • test the high-level client against real OPC/UA servers
  • add functions to the client or tell us which functions you need for gopcua to be useful
  • work on the security layer, server and other components
  • and last but not least, file issues, review code and write/update documentation

Also, if the library is already useful please spread the word as a motivation.

Tested Platforms

gopcua is run in production by several companies and with different equipment. The table below is an incomplete list of where and how gopcua is used to provide some guidance on the level of testing.

We would be happy if you can add your equipment to the list. Just open a PR :)

Device gopcua version Environment By
Siemens S7-1500 v0.1.x..latest production Northvolt
Beckhoff C6015-0010,C6030-0060 on OPC/UA server 4.3.x v0.1.x..latest production Northvolt
Kepware 6.x v0.1.x..latest production Northvolt
Kepware 6.x v0.1.x, v0.2.x production Intelecy
Cogent DataHub 9.x v0.1.x, v0.2.x production Intelecy
ABB Ability EdgeInsight 1.8.X v0.1.x, v0.2.x production Intelecy
GE Digital Historian 2022 HDA Server v0.3.x production Intelecy
B&R Automation PC 3100 v0.3.x production ACS
Siemens S7-1200 v0.3.x CI/CD testing UMH
WAGO 750-8101 v0.3.x CI/CD testing UMH
Microsoft OPC UA simulator v2.9.11 v0.3.x CI/CD testing UMH
Prosys OPC UA Simulation Server v5.4.6-148 v0.3.x manual testing UMH
InfluxDB Telegraf plugin v0.3.x ? Community

Supported Features

The current focus is on the OPC UA Binary protocol over TCP. No other protocols are supported at this point.

Categories Features Supported Notes
Encoding OPC UA Binary Yes
OPC UA JSON not planned
OPC UA XML not planned
Transport UA-TCP UA-SC UA Binary Yes
OPC UA HTTPS not planned
SOAP-HTTP WS-SC UA Binary not planned
SOAP-HTTP WS-SC UA XML not planned
SOAP-HTTP WS-SC UA XML-UA Binary not planned
Encryption None Yes
Basic128Rsa15 Yes
Basic256 Yes
Basic256Sha256 Yes
Authentication Anonymous Yes
User Name Password Yes
X509 Certificate Yes

Services

Here is the current set of supported services. For low-level access use the client Send function directly.

Service Set Service Client Notes
Discovery Service Set FindServers Yes
FindServersOnNetwork Yes
GetEndpoints Yes
RegisterServer
RegisterServer2
Secure Channel Service Set OpenSecureChannel Yes
CloseSecureChannel Yes
Session Service Set CreateSession Yes
CloseSession Yes
ActivateSession Yes
Cancel
Node Management Service Set AddNodes
AddReferences
DeleteNodes
DeleteReferences
View Service Set Browse Yes
BrowseNext Yes
TranslateBrowsePathsToNodeIds
RegisterNodes Yes
UnregisterNodes Yes
Query Service Set QueryFirst
QueryNext
Attribute Service Set Read Yes
Write Yes
HistoryRead Yes
HistoryUpdate
Method Service Set Call Yes
MonitoredItems Service Set CreateMonitoredItems Yes
DeleteMonitoredItems Yes
ModifyMonitoredItems Yes
SetMonitoringMode Yes
SetTriggering
Subscription Service Set CreateSubscription Yes
ModifySubscription
SetPublishingMode
Publish Yes
Republish
DeleteSubscriptions Yes
TransferSubscriptions

Authors

The Gopcua Team.

If you need to get in touch with us directly you may find us on Keybase.io but try to create an issue first.

License

MIT