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A OPC UA gateway which gives you access to your OPC UA values via MQTT or GraphQL (HTTP). If you have an OPC UA server in your PLC, or a SCADA system with an OPC UA server, you can query data from there via MQTT and GraphQL (HTTP). In addition, the gateway can also log value changes from OPC UA nodes in an InfluxDB, IoTDB, Kafka, and others.

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Frankenstein Automation Gateway

Connect one or more OPC UA servers, PLC4X devices or MQTT brokers to the gateway and access the data with a GraphQL, a MQTT, or an OPC UA client. The Gateway additionally offers functionality to log value changes from OPC UA, MQTT and PLC4X in a range of databases and platforms, including InfluxDB, IoTDB, Kafka, among others. Tested with up to 250000 value changes per second on comodity hardware.

The Gateway passes values through, it does not store data internally. The MQTT Broker is not a fully complient MQTT Broker. It does not keep values in memory. If you subscribe to a virtual MQTT-Topic, which must follow certain rules, then it will connect to the tags in OPC UA or PLC4X and will pass the values to the client. If multiple clients subscribe to the same virtual topic, then only one subscription to the device is made and the Gateway will distribute the values to all the clients.

The Gateway also has an integrated OPC UA server. You can define what kind of data from MQTT brokers, other OPC UA servers and from PLC4X devices you want to have in the integraded OPC UA server.

Docker images can be found on Docker Hub.

News and Blog posts can be found here.

Here is a tutorial on YouTube.

Gateway Architecture

Content

Build and Run

It needs Java 17 or higher. There is an issue with Java 8 update 292 and bouncycastl encryption. here you can find more information about this issue..

You can open the project in IntelliJ IDEA IDE and build it there or use grade to build it from command line. Use the included "gradlew" command. Tt will download and use the right gradle version.

> cd source/app
> gradlew build

> export GATEWAY_CONFIG=config.yaml  # Set configuration file (default is config.yaml)
> gradlew run

You can also pass the configuration filename as an argument.

App is with GraphQL, MQTT and the OPC UA connections.
There is also "App-plc4x" which includes the plc4x connectivity.

Configuration

See config.yaml in the app directory for an example how to configure the Gateway. You can pass a configuration file name to the program as the first argument or by setting a environment variable GATEWAY_CONFIG. If no argument is given then config.yaml will be used.

  • There is a YAML schema in the doc directory. This can be used with Visual Studio Code to create a valid YAML configuration for the gateway.

  • In Visual Studio Codee install the "YAML Language Support by Red Hat" Extension. In the settings of this extension you will find the "schema" section, open the settings.json and add one line to the yaml.schemas sections:

yaml.schemas": {        
        "your-path-to-gateway/doc/yaml-json-schema.json": ["config*.yaml"]
}

If you enable GraphiQL, a graphical ui to build and execute GraphQL queries, then you can access GraphiQL with

http://localhost:4000/graphiql/ ! trailing slash is important !

Servers:
  Mqtt:
    - Id: Mqtt
      Port: 1883
      Host: 0.0.0.0
      LogLevel: INFO # ALL | INFO
      
  OpcUa:
    - Port: 4841
      LogLevel: INFO
      Topics:
        - Topic: opc/demo1/path/#
        - Topic: opc/demo2/path/#  

  GraphQL:
    - Id: GraphQL
      Port: 4000
      LogLevel: INFO
      GraphiQL: true

OPCUA Schema in GraphQL

The GraphQL server can read the OPC UA object schema and convert it to a GraphQL schema. The starting NodeIds can be set to reduce the amount of browsed items. Browsing can take some while if the OPC UA server holds a huge structure of tags!

Servers:
  GraphQL:
    - Id: GraphQL
      Port: 4000
      Enabled: true
      LogLevel: INFO                    # ALL | INFO
      GraphiQL: true
      WriteSchemaToFile: false
      Schemas:                          # This systems will be browsed and converted to GraphQL
        - System: "unified"             # Id of OPC UA system, must correlate with the drivers id
          FieldName: BrowseName         # Use "BrowseName" or "DisplayName" as item name in GraphQL
          RootNodes: 
            - ns=2;s=Simulation         # Node will be browsed and added to GraphQL schema 
            - ns=2;s=SimulationMass     # Node will be browsed and added to GraphQL schema          
Drivers:
  OpcUa
  - Id: "unified" 
    Enabled: true
    LogLevel: INFO
    EndpointUrl: "opc.tcp://scada-server:4890"
    UpdateEndpointUrl: scada-server
    SecurityPolicyUri: http://opcfoundation.org/UA/SecurityPolicy#None  

Example GraphQL Query with two OPC UA systems:

{
  Systems {
    unified {
      HmiRuntime {
        HMI_RT_5 {
          Structure_instances{
            A1 {
              Velocity { ...Value }
              RefPoint { ...Value }
            }
          }
        }
      }
    }    
    ignition {
      Tag_Providers {
        default {
          Pump_1 {
            flow { ...Value }
            speed { ...Value }
          }
        }
      }
    }
  }
}

fragment Value on Node {
  Value {
    Value
    SourceTime
  }
}

Topic Mapping

With the built in MQTT Interface you can get access to the connected OPC UA servers by subscribing to MQTT Topics.

The Topic name follows a certain rule. When a MQTT client subscribes to such MQTT topics, then the Gateway will create a subscription to the Node in the OPC UA Server. If multiple clients subscribe to the same Topic/Node, then the Gateway will act as a distributor and only one connection to the node is made.

Note: In the following examples "test" is the Id of the OPC UA Client in the configuration file.

Note: Remove the blanks between the slashe! Just here for better readabilty.

Using the NodeId

opc / test / node / ns=2;s=ExampleDP_Float.ExampleDP_Arg1
opc / test / node / 2 / ExampleDP_Float.ExampleDP_Arg1

Value as JSON with timestamp, quality, ...

opc / test / node:json / ns=2;s=ExampleDP_Float.ExampleDP_Arg1
opc / test / node:json / 2 / ExampleDP_Float.ExampleDP_Arg1

Using the browse path instead of the NodeId

opc / test / path / root-node-id / browse-name / browse-name /...

Wildcard "+" can also be used as a browsename

opc / ua / path:json / ns=1;s=16|Tags / +

"Objects" can be used as root node and will be replace with "i=85"

opc / test / path / Objects / Test / Test00003 / float
opc / test / path / Objects / Test / Test00003 / +

Be careful when using wildcards when there are a lot of nodes, it can lead to a lot of browsing round trips

opc / test / path / Objects / Test / + / float

Logger Configuration

Loggers for different type of sinks can be defined in the configuration file. All of them share a common configuration and can have additonal sink specific configuration. Sink specific configuration can be found in the example configuration files or in the version history.

In the "Logging" section we can specify the Topics which should be logged to the sink. The Topics follow the same rule as MQTT Topics and will map to sources like OPC UA or PLC4X. See Topic Mapping.

Loggers:
  InfluxDB:
    - Id: influx1
      Enabled: true
      Url: http://192.168.1.13:8086
      Database: test
      Username: ""
      Password: ""
      WriteParameters:
        QueueSize: 20000
        BlockSize: 10000
      Logging:
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_SByte/+
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_Byte/+
  

Every logger has an internal topic where the throughput is updated every second. Topic: logger/logger-id/metrics Value: {"Input v/s":20932,"Output v/s":20932} # just an example

OPCUA Driver

See config directory for more example configurations.

Drivers:
  OpcUa:
  - Id: "unified"
    Enabled: true
    LogLevel: INFO
    EndpointUrl:  "opc.tcp://desktop-9o6hthf:4890"
    SecurityPolicy: Basic128Rsa15
    SubscriptionSamplingInterval: 0
    UsernameProvider:
      Username: opcuauser
      Password: password1
    WriteParameters:
      QueueSize: 1000
      BlockSize: 100
      WithTime: true
    MonitoringParameters:
      BufferSize: 10
      SamplingInterval: 0.0
      DiscardOldest: true

PLC4X Driver

You the application app-plc4x to get values from various source supported by PLC4X. See config.yaml in each folder of the app. Because some PLC4X drivers/plc's do not support subscriptions we have added a simple polling options (currently only one polling time per connection).

> cd app-plc4x
cat config.yaml
Drivers:
  Plc4x:
  - Id: "machine1"
    Enabled: true
    Url: "modbus://127.0.0.1:502"
    Polling:
      Time: 1000 # ms
      Timeout: 900 # ms
      OldNew: true
    WriteTimeout: 100 # ms
    ReadTimeout: 100 # ms
    LogLevel: ALL

> gradle run

Example GraphQL Query:

{
  a: NodeValue(
    Type: Plc,
    System: "mod"
    NodeId: "coil:1"
  ) {
    Value
  }
  b: NodeValue(
    Type: Plc
    System: "mod"
    NodeId: "holding-register:1:INT"
  ) {
    Value
    SourceTime
  }  
}

Example MQTT Topic:

plc/mod/node:json/holding-register:1:INT
plc/mod/node/holding-register:2:INT
plc/mod/node:json/coil:1
plc/mod/node/coil:1

MQTT Driver

MQTT Brokers can be connected with MQTT Driver. Withte the RAW Format the values are strings. JSON Format will be the Gateway's JSON format. If you add "CustomJson" to the config, then the JSON format can be customized. You can set JSON-Paths (without $.) to get the value out of a JSON. Currently only JSON objects are supported (not arrays).

Drivers:  
  Mqtt:
    - Id: "mqtt1"
      LogLevel: INFO
      Host: 192.168.1.3
      Port: 1883
      Format: Json
      CustomJson: 
          Value: "Value"
          TimestampMs: "TimeMS"    
          TimestampIso: "TimeISO"

Build Docker Image

You have to build the program before with gradle. Then you can use the shell script docker/build.sh to build a docker image.
docker run --rm --name gateway -p 4000:4000 -p 1883:1883 -v $PWD/config.yaml:/app/config.yaml gateway

C:\Workspace\automation-gateway\source> gradle build
C:\Workspace\automation-gateway\docker> build.bat
C:\Workspace\automation-gateway\docker\examples\hazelcast> docker compose up -d

Version History

1.27 Add target option to MQTT Logger for UNS

With the "Target" option at the Logging Topics, a transformation of the input topic to the target topic can now be done. With that a Unified Namespace (UNS) can be created at the target MQTT broker, with incomding non UNS topic names.

If a wildcard is used at the source topic, like opc/home1/path/Objects/Mqtt/home/Original/Gas/#, then the browsed/resolved names can be added to the end of the target topic. Just add a wildcard "#" also at the end of the target topic. If there is no wildcard at the target, then all the resolved topics of the source are all written to the same target topic.

Loggers:
  Mqtt:
    - Id: "mqtt1"
      Enabled: true
      Host: 192.168.1.4
      Port: 1883
      Topic: demo
      Format: JsonSimple
      LogLevel: INFO
      Retained: false
      Logging:
        - Topic: opc/demo2/path/Objects/Demo/SimulationMass/SimulationMass_Boolean/Boolean_00
          Target: uns/rocworks/site1/area1/line1/sim1/bool00
        - Topic: opc/demo2/path/Objects/Demo/SimulationMass/SimulationMass_Byte/#
          Target: uns/rocworks/site1/area1/line1/sim2/#
        - Topic: opc/home1/path/Objects/Mqtt/home/Original/Gas/#
          Target: uns/rocworks/site1/area1/line1/gas/#
        - Topic: opc/home1/path/Objects/Mqtt/home/Original/Meter_Input/#
          Target: uns/rocworks/site1/area1/line1/meter/input/#
        - Topic: opc/home1/path/Objects/Mqtt/home/Original/Meter_Output/#
          Target: uns/rocworks/site1/area1/line1/meter/output/#
        - Topic: opc/home1/path/Objects/Mqtt/home/Original/PV/#
          Target: uns/rocworks/site1/area1/line1/pv/# 

1.26 Reactivated Neo4j Logger

Added Neo4j as an option to log values from MQTT or OPC UA to the graph database. Additionally the OPC UA node structure can also be replicated to the graph database. This will be done only once at the startup of the Automation Gateway. For MQTT the node structure will be built during runtime, as new topics are coming in, the structure will be created.

Loggers:
  Neo4j:
    - Id: neo4j
      Enabled: true
      Url: bolt://nuc1.rocworks.local:7687
      Username: "neo4j"
      Password: "neo4j"
      Schemas:
        - System: demo1
          RootNodes:
            - "ns=2;s=Variables"
        - System: demo2
          RootNodes:
            - "ns=2;s=Demo"
      Logging:
        - Topic: mqtt/mqtt1/path/Original/#
        - Topic: opc/demo1/path/Objects/Variables/#
        - Topic: opc/demo2/path/Objects/Demo/SimulationMass/#

1.25 MQTT Driver Custom JSON Format

With format JSON it is now possible to define the JSON-Path for the value and for the timestamp in milliseconds since epoch or ISO 8601. If CustomJson is not defined, then the JSON content is a defined JSON format of the Gateway. The format is used for reading and writing.

Drivers:  
  Mqtt:
    - Id: "mqtt1"
      LogLevel: INFO
      Host: 192.168.1.3
      Port: 1883
      Format: Json
      CustomJson: 
          Value: "Value"
          TimestampMs: "TimeMS"    
          TimestampIso: "TimeISO"

1.24 Added OPC UA server

The Gateway now also has an integrated OPC UA server. You can define what kind of data from MQTT brokers, other OPC UA servers and from PLC4X devices you want to have in the integraded OPC UA server. Data will be mapped to structured nodes in the OPC UA server. It is also possible to change the values in the OPC UA server and the changed values will be written back to the source (MQTT broker, other OPC UA server, PLC4X connected device).

There is now also a GraphQL interface for the configuration of the gateway. This GraphQL Server can be enabled by setting the environment variable "GATEWAY_CONFIG_PORT=9999". 9999 will be the port for the configuration GraphQL serer. This configuration GraphQL server can be used to build a configuration Ui for the gateway.

1.23 Upgrade to VertX 4.4.6

The GraphQL server websocket subprotocol now changed to the new one: "graphql-transport-ws". The older Apollo subprotocol "graphql-ws" is not supported anymore.

Note: In some GraphQL context the naming of the two protocols can be confusing. From apollographql.com: Confusingly, the subscriptions-transport-ws library calls its WebSocket subprotocol graphql-ws, and the graphql-ws library calls its subprotocol graphql-transport-ws! The names of the protocol and the websocket subprotocol are exchangend.

1.22 Config file changes

!!! Config file structure has changed !!!

To have a consistant layout of the config file, it was necessary to change the structure of it. Existing config files must be changed! Please use the Visual Studio Code YAML plugin to change your existing configs. See Configuration.

Example of the new config file:

Servers:
  GraphQL:
    - Id: "GraphQL"        
  Mqtt:
    - Id: "Mqtt"

Drivers:   
  Mqtt:
    - Id: remote
      Host: bd9c43f59b7a42deba3248fca439f378.s1.eu.hivemq.cloud
      Port: 8883

  OpcUa:
    - Id: demo1
      EndpointUrl: "opc.tcp://192.168.1.3:62540/server"
      SecurityPolicy: None

    - Id: demo2
      EndpointUrl: "opc.tcp://192.168.1.3:62541"
      SecurityPolicy: None     

Loggers:    
  InfluxDB:
    - Id: InfluxLogger1      
      Url: http://nuc1b.rocworks.local:8086
      Database: test
      Logging:
        - Topic: opc/demo1/path/Objects/Variables/#
        - Topic: opc/demo2/path/Objects/Demo/SimulationMass/#
        - Topic: mqtt/remote/path/Austria/Sparkplug/#

  Mqtt:
    - Id: MqttLogger1
      Host: linux0.rocworks.local
      Port: 1883
      Format: Raw
      Topic: test1
      Logging:
        - Topic: mqtt/remote/path/Austria/Sparkplug/#
  

1.21.2 Fixes and SparkplugB for Kafka & MQTT Logger

Kafka and MQTT Logger can now publish SparkplugB message format.

1.21.1 Fixes and SparkplugB for MQTT Driver

There is now a Format option for the MQTT driver. It can now read SparkplugB messages from topics. You can use now a logger to log values from a MQTT broker which are in SparkplugB message format. You can also write values from GraphQL or publish a value from the MQTT server to the MQTT driver. If the format of the MQTT driver is set to SparkplugB, it will publish a SparkplubB message.

Driver:
  Mqtt:
    - Id: "mqttclient1"
      Host: linux0.rocworks.local
      Port: 1883    
      Format: SparkplugB # RAW | JSON

MQTT Publish Example:

  • mqtt/mqttclient1/node:value/Enterprise/Test => Hallo World
  • mqtt/mqttclient1/node:json/Enterprise/Test => {"value": "Hello World", "sourceTime":"2023-10-19T18:23:55.389Z"}

1.21 IoTDB, MQTT SparkplugB Logger, YAML Schema, Native-Image

  • IoTDB is now again available as data logger.
  • SparkplubB message format for MQTT logger.
  Logger:
    - Id: mqtt1
      Type: Mqtt
      Enabled: true
      LogLevel: INFO       
      Mqtt:
        Host: linux0.rocworks.local
        Port: 1883
        Topic: Enterprise/Site/Area/Line
        Format: Json
        BulkMessages: false                   
      Logging:
        - Topic: opc/demo1/path/Objects/Variables/#
        - Topic: opc/demo2/path/Objects/Demo/SimulationMass/#
  • YAML json schema is now availabe in the doc directory. It can be used with the "YAML Language Support by Red Hat" Extension. In the settings find the Schema section, open the settings.json and add one line to the yaml.schemas sections:
yaml.schemas": {        
        "your-path-to-gateway/doc/yaml-json-schema.json": ["config*.yaml"]
}
  • Update to Gradle 8.4 with new build files.
  • Native image build was upgraded to GraalVM 17 and Java 17.
  • Native image works with Mqtt,Kafka,InfluxDB and IoTDB.
  • Logger configurations have now a separate object for the type specific configurations (but the old style yaml format is still supported). This was necessary for the YAML json schema.
- Id: iotdb1
      Type: IoTDB
      Enabled: false
      IoTDB: # same name as Type
        Host: linux0.rocworks.local
        Port: 6667
        Database: root.gateway
        Username: "root"
        Password: "root" 
      LogLevel: INFO       

  • For published data we use now a DataPoint type instead of JSON. With the JSON format we have lost the origin datatype of the source. By using the new DataPoint type (Topic+TopicValue) the data type is preserved.
  • Upgrade from Vert.X 4.2.4 to 4.2.7

1.20.3 Moved Neo4J to separate branches

Neo4J is now in a separate branch and is removed from the main branch

1.20.2 Modifed JSON Format of Kafka Logger

Added times in ms epoch and also added the value as double and as string.

{
	"nodeId": "ns=2;i=3",
	"systemName": "scadaopcua",
	"topicName": "opc/scadaopcua/path/Objects/Home/#",
	"browsePath": "Objects/Home/Gas/Daily",
	"sourceTime": "2023-07-14T09:53:43.945894Z",
	"serverTime": "1601-01-01T00:00:00Z",
	"sourceTimeMs": 1689328423945,
	"serverTimeMs": -11644473600000,
	"value": 2,
	"valueAsString": "2",
	"valueAsDouble": 2,
	"statusCode": "0"
}

1.20.1 Kafka properties in the config file

It can be configured with a bunch of properties as described in the official Apache Kafka documentation.

Put the properites and values below "Configs" - see example below where the "batch.size" is set to 10000.

But be careful, you will not get an error message if you set an unknow property, so be sure to use right name of the property.

Database:
  Logger:
    - Id: kafka1
      Type: Kafka
      Enabled: true
      Servers: nuc1.rocworks.local:9092
      Configs:  # you can set any valid Kafka producer property here
        batch.size: 10000
      WriteParameters:
        QueueSize: 20000
        BlockSize: 10000
      Logging:
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_SByte/+
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_Byte/+

1.20 Cleanup and GraalVM Native Build

GraalVM Native Image build is now possible, see directory "native". Removed various unused features and upgraded libraries to the latest versions. For the native build it was needed to replace SLF4J logging with the standard Java logging.

Removed Features:

  • Clustering
  • NATS
  • DDS
  • IoTDB: it leads to debug(!) log messages of other components, did not invest time to find out how to get rid of this behaviour.
  • MQTTDriver: it uses Groovy and I could get it running natively compiled, so I had to remove it to get rid of Groovy

Fixed bug: Topic data class now contains two separate fields "path" and "node". Before there was only one field "address". This also fixed a Bug when connecting/disconnecting of topics with wildcards.

1.19 Neo4j Logger

!! NOT AVAILABLE ANYMORE !! Separate Branch !!
Added Neo4j as an option to log values from OPC UA to the graph database. Additionally the OPC UA node structure can also be replicated to the graph database. This will be done only once at the startup of the Automation Gateway.

Database:
  Logger:
    - Id: neo4j
      Enabled: true
      Type: Neo4j
      Url: bolt://nuc1.rocworks.local:7687
      Username: "neo4j"
      Password: "manager"
      Schemas:
        - System: opc1  # Replicate node structure to the graph database
          RootNodes:
            - "ns=2;s=Demo"  # This node and everything below this node
        - System: winccoa1  # Replicate the nodes starting from "i=85" (Objects) node
      WriteParameters:
        BlockSize: 1000
      Logging:
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_Float/+
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_Double/+
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_Int16/+
        - Topic: opc/winccoa1/path/Objects/PUMP1/#
        - Topic: opc/winccoa1/path/Objects/ExampleDP_Int/#


1.18.3 Added MQTT Websocket Option and simple Authentication

Added the option to enable a Websocket listener for the MQTT server. The Websocket listener is listening on the endpoint "/mqtt". Example MQTT Client Url: "ws://your-host-or-ip/mqtt"

MqttServer:
  Listeners:
    - Id: Mqtt  # Tcp listener without authentication
      Port: 1883

    - Id: MqttWs  # Websocket listener with authentication
      Port: 1884
      Websocket: true  
      Username: system  # If empty, then any username can be used
      Password: manager  # If empty, then any or no password can be used

1.18.2 Raw value to engineering value conversion for PLC4X driver

!! NOT AVAILABLE ANYMORE !!
It is now possible to define Groovy functions to convert raw values to engineering values. Every incoming or outgoing value will be passed through the defined functions. The functions can currently only be defined at the connection level, so every value coming from this PLC connection goes through the conversion functions.

Plc4x:
  Drivers:
    - Id: "niryo"
      Enabled: true
      Url: "modbus://192.168.1.9:5020"
      Polling:
        Time: 100
        Timeout: 90
        OldNew: true
      WriteTimeout: 100
      ReadTimeout: 100
      LogLevel: ALL
      Value:
        Reader: > # Here is the function for incoming values
          def x = value as int;
          return x > 32767 ? 32767 - x : x
        Writer: > # Here is the function for outgoing values
          def x = value as int;
          return x < 0 ? 32767 - x : x

If you need different functions for different addresses then you have to implement a switch/case statement. The functions have two arguments: "address" and "value".

Here is an example where a value conversion is done only for some addresses:

      Value:
        Reader: >
          def x = value as int;
          def xs = ["input-register:1:UINT", "input-register:2:UINT", "input-register:2:UINT"];
          if (xs.contains(address)) {
            println "convert!"
            return x > 32767 ? 32767 - x : x;
          } else {
            println("default")
            return x;
          } 

1.18.1 Features and fixes in PLC4X driver

Auto reconnect to the PLC if the connection is lost.
Read/Write/Poll only if the connection to the PLC is up.
Fixed issue when writing a value fails (stopped the writing thread).
Fixed issue in unsubscribe with polling option (polling item was not removed).
Fixed issue when a client disconnects (unsubscribe with a list of topics failed).
Added new configuration settings for the driver: timeout in ms for write, read, polling.

Plc4x:
  Drivers:
    - Id: "machine1"
      Enabled: true
      Url: "modbus://127.0.0.1:502"
      Polling:
        Time: 1000
        Timeout: 900 # ms
        OldNew: true
      WriteTimeout: 100 # ms
      ReadTimeout: 100 # ms
      LogLevel: INFO

1.18 Removed Apache Ignite

Apache Ignite was removed due to its size and maintenance requirements. We don't know of anyone using the Ignite option, so we decided to remove it.

1.17 Added CrateDB as supported JDBC database for logging

CrateDB is now also supported as JDBC database for logging. If the table (default name "events") does not exists, it will be created partitioned by the month of the source time with four shareds. But you can create the table manually in advance with the settings of your needs.

CREATE TABLE IF NOT EXISTS $sqlTableName (
  "sys" TEXT, 
  "nodeid" TEXT,          
  "sourcetime" TIMESTAMP WITH TIME ZONE,
  "servertime" TIMESTAMP WITH TIME ZONE,
  "sourcetime_month" TIMESTAMP WITH TIME ZONE GENERATED ALWAYS AS date_trunc('month', "sourcetime"),
  "numericvalue" DOUBLE,
  "stringvalue" TEXT,
  "status" TEXT,
  PRIMARY KEY (sourcetime_month, sourcetime, sys, nodeid)
) CLUSTERED INTO 4 SHARDS PARTITIONED BY ("sourcetime_month");   

1.16 JDBC Logger to write field values to relational databases

Added the option to log values to a JDBC compliant relational database. You have to add the JDBC driver to your classpath and set the appropriate JDBC URL path in the configuration file. PostgreSQL, MySQL and Microsoft SQL Server JDBC drivers are already included in the build.gradle file (see lib-jdbc/build.gradle) and also appropriate SQL statements are implemented for those relational databases. If you use other JDBC drivers you can add the driver to the lib-jdbc/build.gradle file as runtime only dependency and you may specify SQL statements for insert and select in the configuration file.

You can specify the table name in the config file with the option "SqlTableName", if you do not specify the table name then "events" will be used as default name.

Specify JDBC drivers in the lib-jdbc/build.gradle file:

    runtimeOnly group: 'org.postgresql', name: 'postgresql', version: 'x.x.x'
    runtimeOnly group: 'mysql', name: 'mysql-connector-java', version: 'x.x.x'
    runtimeOnly group: 'com.microsoft.sqlserver', name: 'mssql-jdbc', version: 'x.x.x.jre11'

Create a table with this structure. For PostgreSQL, MySQL and Microsoft SQL Server the table will be created on startup automatically.

  CREATE TABLE IF NOT EXISTS public.events
  (
      sys character varying(30) NOT NULL,
      nodeid character varying(30) NOT NULL,
      sourcetime timestamp without time zone NOT NULL,
      servertime timestamp without time zone NOT NULL,
      numericvalue numeric,
      stringvalue text,
      status character varying(30) ,
      CONSTRAINT pk_events PRIMARY KEY (system, nodeid, sourcetime)
  )
  TABLESPACE ts_scada;

Configuration of JDBC database logger:

Database:
  Logger:
    - Id: postgres
      Type: Jdbc
      Enabled: true
      Url: jdbc:postgresql://nuc1:5432/scada
      Username: system
      Password: manager
      SqlTableName: events     
      WriteParameters:
        QueueSize: 20000
        BlockSize: 10000
      Logging:
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_SByte/+
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_Byte/+

Because the SQL dialect can be slightly different with other databases, you can specify the insert and select SQL statement in the config file:

Database:
  Logger:
    - Id: other
      Type: Jdbc
      Enabled: true
      Url: jdbc:other://nuc1:1111/scada
      Username: system
      Password: manager
      SqlTableName: events     
      SqlInsertStatement: > 
        INSERT INTO events (sys, nodeid, sourcetime, servertime, numericvalue, stringvalue, status)
         VALUES (?, ?, ?, ?, ?, ?, ?)
         ON CONFLICT ON CONSTRAINT PK_EVENTS DO NOTHING  
      SqlQueryStatement: >
        SELECT sourcetime, servertime, numericvalue, stringvalue, status
         FROM events
         WHERE sys = ? AND nodeid = ? AND sourcetime >= ? AND sourcetime <= ? 

1.15 Nats Logger to write field values to a Nats server

!! NOT AVAILABLE ANYMORE !!
Added a Nats Logger to write field values to a Nats server. It is like a database logger, but it writes the values to a configurable Nats server. Any values which get into Frankenstein (OPC UA, PLC4X, DDS, MQTT) by a Driver can be logged to a Nats server. The values are stored in JSON format.

Database:
  Logger:
    - Id: nats1
      Type: Nats
      Enabled: true
      Url: "nats://nuc1:4222"
      WriteParameters:
        QueueSize: 20000
        BlockSize: 10000
      Logging:
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_SByte/+
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_Byte/+

1.14 Fixes and optimizations

  • MQTT Driver: Caching of NodeIds in MQTT Driver (topic to NodeId cache).
  • MQTT Server and Driver: max message size can be set in config file (e.g. for Video streaming).
  • GraphQL Define one or more starting/root NodeIds for GraphQL OPC UA schema import.
  • GraphQL: Renamed "NodeIds" to "RootNodes" in Schema section (for OCP UA )
  • Renamed TopicValueDDS to TopicValueJson.

1.13 MQTT Logger to write field values to a MQTT Broker

Added a MQTT Logger to write field values to a MQTT Broker. It is like a database logger, but it writes the values to a configurable MQTT Broker. Any values which get into Frankenstein (OPC UA, PLC4X, DDS, MQTT) by a Driver can be logged to a MQTT Broker. The values are stored in JSON format.

Database:
  Logger:
    - Id: mqtt1
      Type: Mqtt
      Enabled: true
      Host: 192.168.1.169
      Port: 1883
      Ssl: false
      WriteParameters:
        QueueSize: 20000
        BlockSize: 10000
      Logging:
        - Topic: opc/smarthome/path/Meter_Input/WattAct
        - Topic: opc/smarthome/path/Meter_Output/WattAct
        - Topic: opc/smarthome/path/PV/Spot/+

1.12 MQTT Driver with Groovy script transformer

!! NOT AVAILABLE ANYMORE !!
Added a inital version of a MQTT Driver to get values from a MQTT Broker into Frankenstein. A Groovy script can be used to transform the values to an OPC UA format, so that Frankenstein can be used to log those value to databases. Functionality is currently very limited, only subscribe is implemented.

In this example we transform values of a MQTT Broker from this format: {"TimeMS":1620327963328,"Value":10.277357833719135} to our internal TopicValueOpc format by using a Groovy script and then log some topic values to an InfluxDB.

MqttClient:
  - Id: "mqtt1"
    Enabled: true
    LogLevel: INFO
    Host: 192.168.1.6
    Port: 1883
    Ssl: false
    Value:
      Format: JSON
      Script: >
        return [ 
          className: "TopicValueOpc",
          sourceTime: Instant.ofEpochMilli(source.TimeMS).toString(),
          serverTime: Instant.now().toString(),
          value: source.Value,
          dataTypeId: 0,
          statusCode: 0 ]

Database:
  Logger:
    - Id: influx1
      Type: InfluxDB
      Enabled: true
      Url: http://192.168.1.13:8086
      Database: test
      Username: ""
      Password: ""
      WriteParameters:
        QueueSize: 20000
        BlockSize: 10000
      Logging:
        - Topic: mqtt/mqtt1/path/Meter_Input/WattAct
        - Topic: mqtt/mqtt1/path/Meter_Output/WattAct
        - Topic: mqtt/mqtt1/path/PV/Spot/+          

1.11 Apache Kafka Database Logger

Added Apache Kafka as tag logger option, all incoming value changes of the configured topics will be published to an Apache Kafka Broker. How to can be found here

Database:
  Logger:
    - Id: kafka1
      Type: Kafka
      Servers: server2:9092
      WriteParameters:
        QueueSize: 20000
        BlockSize: 10000
      Logging:
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_SByte/+
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_Byte/+

You can also use KSQL to analyze the tag stream. Connect to a ksql cli:

docker exec -ti ksqldb-cli ksql http://ksqldb-server:8088

Create a stream for your logger. Each logger has its own Kafka-Topic. Topic name is equal to the source id of the tag (opc/opc1/...)

CREATE STREAM opc1(
  browsePath VARCHAR KEY, 
  sourceTime VARCHAR, 
  value DOUBLE, 
  statusCode VARCHAR
) WITH (
  KEY_FORMAT='KAFKA',
  KAFKA_TOPIC='opc1', 
  VALUE_FORMAT='JSON',
  TIMESTAMP='sourceTime',TIMESTAMP_FORMAT='yyyy-MM-dd''T''HH:mm:ss[.n]X'
);

Example of a simple quey:

SELECT node, COUNT(*) 
FROM opc1 
WINDOW SESSION (10 SECONDS) 
WHERE node like '%_00' 
GROUP BY node 
EMIT CHANGES;

1.10 Apache IoTDB Database Logger

!! NOT AVAILABLE ANYMORE !! Separate Branch !!
Added Apache IoTDB as tag logger option.

Database:
  Logger:
   - Id: iotdb1
      Type: IoTDB
      Host: server2
      Port: 6667
      Database: root.scada1
      Username: "root"
      Password: "root"
      WriteParameters:
        QueueSize: 20000
        BlockSize: 10000
      Logging:
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_SByte/+
        - Topic: opc/opc1/path/Objects/Demo/SimulationMass/SimulationMass_Byte/+

1.9 Apache Ignite as Cluster option and Ignite as Memory-Store

Added Apache Ignite as an option for clustering and also to use the Apache Ignite Distributed In Memory Cache for storing last and history values coming from OPC UA or other sources. With that enabled it is possible to do SQL queries on the process values. The cache node stores historical value changes for a defined timerange. So older values are purged on a regular basis (configurable in the configuration file). It is configurable which topics should be stored in the Apache Ignite Cache.

Cache:
  - Id: "global"
    Enabled: true
    LogLevel: INFO
    SqlIndexMaxInlineSize: 1000
    StoreHistoryValues: true
    Systems:
      - SystemType: Opc
        SystemName: "opcua1"
        PurgeEverySeconds: 10
        KeepLastSeconds: 180
      - SystemType: Opc
        SystemName: "opcua2"
        PurgeEverySeconds: 10        
        KeepLastSeconds: 180                                    
    Logging:
      - Topic: opc/opcua1/path/Objects/Demo/SimulationMass/SimulationMass_Double/+
      - Topic: opc/opcua2/path/Objects/Demo/SimulationMass/SimulationMass_Double/+

Updates on the tables are currently not possible. It is implemented that updates on the updatevalue columns should write the values to the source OPC UA server, but unfortunately it leads to unexpected behaviour of the Ignite Cluster.

There is a command line query tool available in the Apache Ignite Distribution. But you can also download the JDBC driver or ODBC drive from the Apache Ignite Website and use any other JDBC/ODBC client tool.

C:\Tools\apache-ignite-2.9.1-bin\bin\sqlline.bat -u jdbc:ignite:thin://192.168.1.18

Example Queries:

select * from global.opcnode where nodeid like '%Mass%'  

select systemname, count(*) 
from global.opcvalue
 group by systemname;   

select systemname, count(*), min(sourcetime), max(sourcetime) 
from global.opcvaluehistory 
group by systemname;  

There are Docker examples available in the docker/examples directory.

C:\Workspace\automation-gateway\source> gradle build
C:\Workspace\automation-gateway\docker> build.bat
C:\Workspace\automation-gateway\docker\examples\ignite> docker compose up -d

1.8 Upgrade to VertX 4.0.3

Upgraded to VertX 4.0.3 and splitted the value type to a base class with subclasses for Opc, Plc and DDS. The app names have been changed, the clustered apps are now named with "cluster". DDS values can now be logged to InfluxDB.

1.7 DDS Driver (subscribe and publish)

!! NOT AVAILABLE ANYMORE !!
Added a first version of DDS support. Currently only MQTT subscribe and publish to DDS topics are functional. It is the app-dds application, the app-gateway must also be up and running.

You need to install OpenDDS and build it with Java support. And you also have to compile your DDS IDL files with Java support. See the ReadMe.txt in the idl directory of app-dds.

Example MQTT Topic:

dds/system-id/path/topic-type-name/topic-name
dds/demo/path/shape/Circle
dds/demo/path/shape/Square

Configuration

DDS:
  Domains:
    - Id: "demo"
      Enabled: true
      LogLevel: ALL
      DCPSConfigFile: rtps.ini
      Domain: 0
      TopicTypes:
        - Id: "shape"
          TopicTypeName: "org.omg.dds.demo.ShapeType"
        - Id: "message"
          TopicTypeName: "org.omg.dds.demo.Message"

1.6 Added GraphiQL (http://localhost:4000/graphiql/)

Added GraphiQL to the Gateway and optionally write the browsed schemas (OPC UA and generated GraphQL scheam) to files.

GraphQLServer:
  Listeners:
    - Port: 4000
      LogLevel: ALL
      GraphiQL: true  # Enable GraphiQL
      WriteSchemaToFile: false  # Write GraphQL Schema to a file
      Schemas:
        - System: ignition
          FieldName: BrowseName # BrowseName | DisplayName
OpcUaClient:
  - Id: "ignition"
    Enabled: true

1.5 OPC UA Schemas to GraphQL Schema Importer

Support multiple OPC UA schemas in GraphQL. Be sure that you have set BrowseOnStartup: true for the OPC UA servers which you want to embed in the GraphQL schema. Additionally it can be defined which OPC UA field should be taken as the GraphQL field name: it can be "BrowseName" or "DisplayName". But be careful, the DisplayName must not be unique below a node, so it can lead to an invalid schema.

GraphQLServer:
  Listeners:
    - Port: 4000
      LogLevel: ALL
      Schemas:
        - System: ignition
          FieldName: BrowseName # BrowseName | DisplayName
OpcUaClient:
  - Id: "ignition"
    Enabled: true

About

A OPC UA gateway which gives you access to your OPC UA values via MQTT or GraphQL (HTTP). If you have an OPC UA server in your PLC, or a SCADA system with an OPC UA server, you can query data from there via MQTT and GraphQL (HTTP). In addition, the gateway can also log value changes from OPC UA nodes in an InfluxDB, IoTDB, Kafka, and others.

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