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Milo is an open-source implementation of OPC UA. It includes a high-performance stack (channels, serialization, data structures, security) as well as client and server SDKs built on top of the stack.

Stack Overflow tag: milo

Mailing list: https://dev.eclipse.org/mailman/listinfo/milo-dev

Using JDK 8, run mvn clean install from the project root.

Releases are published to Maven Central and snapshots to Sonatype.

<dependency>
 <groupId>org.eclipse.milo</groupId>
 <artifactId>sdk-client</artifactId>
 <version>0.3.2</version>
</dependency>

<dependency>
 <groupId>org.eclipse.milo</groupId>
 <artifactId>sdk-server</artifactId>
 <version>0.3.2</version>
</dependency>

Referencing a SNAPSHOT release requires the Sonatype snapshot repository be added to your pom file:

<repository>
 <id>oss-sonatype</id>
 <name>oss-sonatype</name>
 <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
</repository>

An internet-facing demo server is accessible at opc.tcp://milo.digitalpetri.com:62541/milo.

It accepts both unsecured and secured connections. Before connecting with security you must upload your client's DER-encoded X509 certificate using the form at http://milo.digitalpetri.com.

Authenticate anonymously or with one of the following credential pairs:

• user1 / password
• user2 / password
• admin / password