darra-opcua

Darra OPC UA Client SDK — Python 绑定。六语言 (C# / C / C++ / Python / Java / Rust) 完全对齐, C# 为接口基准。

主页: https://opcua.darra.xyz
文档: https://opcua.darra.xyz/docs/sdk/python
仓库: https://github.com/DarraTechnology/DarraOpcUaClient
反馈: jtl1207@darra.xyz

简介

Darra OPC UA Client 是独立的 OPC UA 客户端 SDK, 通过原生 Darra.OpcUa.Core.dll (随包安装) 提供完整的 OPC UA 1.04 客户端能力:

会话管理 / 自动重连
节点浏览 / 属性读写
订阅与监控项 / 自动重建
历史数据访问
事件订阅
安全 (None / Sign / SignAndEncrypt) + 用户令牌 (Anonymous / UserName / Certificate)
服务发现 (Discovery)

不包含 Server 实现 (Darra 的 Server 由 Darra.PLC.Service 提供)。

安装

pip install darra-opcua

当前 Wheel 仅打包 Windows x64 (依赖 Darra.OpcUa.Core.dll)。 Linux / macOS 后续版本提供。

快速示例

from darra_opcua import Session, NodeId, AttributeId

# 1. 连接 OPC UA Server
session = Session.connect("opc.tcp://127.0.0.1:4840")

# 2. 浏览根节点
for r in session.browse(NodeId.numeric(0, 84)):
    print(f"{r.browse_name} -> {r.node_id}")

# 3. 读节点值
val = session.read_value(NodeId.string(2, "MyVar"))
print("Value =", val)

# 4. 创建订阅 + 监控项 (1000ms 采样)
sub_id = session.create_subscription(publishing_interval=1000.0)
session.create_monitored_item(sub_id, NodeId.string(2, "MyVar"))

# 5. 关闭
session.close()

更多示例: examples/demo.py

状态

当前版本: 0.6.0 (Beta)
协议: OPC UA 1.04
Python: 3.8 - 3.12
平台: Windows x64 (主), Linux x64 / macOS 跟进中
与 C# / Rust / Java SDK 完全对齐 (相同方法名 / 相同枚举 / 相同行为)

许可证

MIT — 完全免费, 商用闭源亦可. 详见 https://opcua.darra.xyz/docs/faq/licensing

链接

完整 API 文档: https://opcua.darra.xyz/docs/sdk/python
常见问题: https://opcua.darra.xyz/docs/faq
其他语言: C# / C / C++ / Rust / Java

Release files for darra-opcua 0.6.0.post1

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for darra-opcua 0.6.0.post1
File	Size	Uploaded
darra_opcua-0.6.0.post1.tar.gz	12.4 MB	Apr 26, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for darra-opcua 0.6.0.post1
File	Interpreter	ABI	Platform	Reset
darra_opcua-0.6.0.post1-py3-none-any.whl 12.4 MB Apr 26, 2026	Python 3	none	any	Details

Total release size: 24.9 MB

Release files / darra_opcua-0.6.0.post1.tar.gz

Download URL	darra_opcua-0.6.0.post1.tar.gz
Size	12.4 MB
Tags	Source
SHA-256 checksum How to use checksums	`163b6880312364aa53051ec491186b17f59141357ea98dfaee70ee59e3fc2ef1`
BLAKE2b-256 checksum How to use checksums	`9683bca0383e763ff0f516e3b09f570e631e9f5c527db5be31beaf3e345f4519`
Upload date	Apr 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.13.13`

Release files / darra_opcua-0.6.0.post1-py3-none-any.whl

Download URL	darra_opcua-0.6.0.post1-py3-none-any.whl
Size	12.4 MB
Tags	Python 3
SHA-256 checksum How to use checksums	`1e94b356fc99eb0598603944b9ee4c7a13bc7529323fe335e78820c43ddf3bd3`
BLAKE2b-256 checksum How to use checksums	`f9f803d4612cc226750713b5c42237664a4348146bb5e58e7b5b5796053d8bfa`
Upload date	Apr 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.13.13`