Because Clojure is a JVM language, oa4j can be used to connect to WinCC Open Architecture.

(def manager (new JManager))

(defn callback [values]
  (let [v (reduce #(+ %1 %2) (map #(.getValueObject %) values))];
    (dpSet :ExampleDP_Trend1. v)))

(defn -main [& args]
  (.init manager (into-array args))
  (.start manager)
  (dpSet {:ExampleDP_Arg1. 2.0 :ExampleDP_Arg2. 3.0})
  (println (clojure.string/join "," 
    (dpGet [:ExampleDP_Arg1. :ExampleDP_Arg2.])))
  (let [c (dpConnect [:ExampleDP_Arg1. :ExampleDP_Arg2.] callback)]
    (Thread/sleep 180000)
    (.disconnect c))
  (.stop manager))

Full example can be found here.

Here you will find Dockerfiles for WinCC OA: https://github.com/vogler75/winccoa-images

Clojure code for matrix multiplication (source: Rosetta Code) … short & smart…

(def mmul (fn [a b]
  (let [nested-for (fn [f x y] (map (fn [a] (map (fn [b] (f a b)) y)) x))
        transpose (fn [m] (apply map vector m))]
    (nested-for (fn [x y] (reduce + (map * x y))) a (transpose b)))))

(def ma [[1 2 3 4]
         [4 3 2 1]])

(def mb [[1]
         [2]
         [3]
         [4]])

(defn -main [& args]
  (println (mmul ma mb)))

Got an IoT2040 from Siemens. It is Arduino compatible and runs on Yocto Linux. ETM managed to compile the SCADA System WinCC Open Architecture on it, additionally we used a MQTT server (mosquitto), Node-Red with MQTT, and a MQTT Driver for WinCC OA written in Java… runs well. Just connected a simple LED and a Button with Node-Red, those can now be controlled by WinCC OA. Because WinCC OA runs on it, it can be used to connect a wide range of different devices (a lot of drivers are available for WinCC OA).

Perfect as an Edge device to collect data from the field… Industrial IoT with Siemens!

Created a Alexa Skill in the Amazon Cloud, connected it to an endpoint which is a WinCC OA Control Manager and let it control devices which are connected to the Scada system with natural speech…

DocumentDB : “NoSQL service for highly available, globally distributed apps—take full advantage of SQL and JavaScript over document and key-value data without the hassles of on-premises or virtual machine-based cloud database options.”

Microsofts DocumentDB supports the MongoDB protocol, so it is possible to write values from WinCC OA to the Azure Cloud with a MongoDB Database Logger.

is now available at GitHub: https://github.com/vogler75/oa4j

Implemented a Manager and a Driver for Epics (in Java).