{"id":1435,"date":"2024-09-03T10:01:15","date_gmt":"2024-09-03T08:01:15","guid":{"rendered":"https:\/\/www.rocworks.at\/wordpress\/?p=1435"},"modified":"2024-09-03T10:01:33","modified_gmt":"2024-09-03T08:01:33","slug":"mqtt-server-interface-for-wincc-oa-made-with-kotlin-%f0%9f%98%b2","status":"publish","type":"post","link":"https:\/\/www.rocworks.at\/wordpress\/?p=1435","title":{"rendered":"MQTT Server Interface for WinCC OA? Made with Kotlin \ud83d\ude32"},"content":{"rendered":"\n


Starting with WinCC OA Version 3.20, you can write your business logic in JavaScript and run them using Node.js, providing direct access to the WinCC OA Runtime.

\ud83d\ude48 With that, I have developed a Kotlin program that acts as an MQTT Broker. When you subscribe to a topic (where the topic name matches a datapoint name), the program will send value changes from the corresponding WinCC OA datapoint to your MQTT client.

\u2753 But wait, Kotlin is like Java, it runs on the JVM, it is not JavaScript!

\ud83d\udca1 Did you know that a Node.js Runtime built with GraalVM exists? It allows you to mix Java and JavaScript. And it also works with WinCC OA.

\ud83e\udd29 You can use JVM based languages and its huge ecosystem to develop business logic with WinCC OA. I have developed a Java library which makes it easier to use the WinCC OA JavaScript functions in Java.

\ud83d\udc49 Here it is: https:\/\/github.com\/vogler75\/winccoa-graalvm<\/a> please note that the example program is provided as an example; it lacks security features and has not been tested for production use. However, it can be extended and customized to meet specific requirements.

\u26a1 Please be aware that the GraalVM Node.js Runtime is not officially supported by WinCC Open Architecture.
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Starting with WinCC OA Version 3.20, you can write your business logic in JavaScript and run them using Node.js, providing direct access to the WinCC OA Runtime. \ud83d\ude48 With that, I have developed a Kotlin program that acts as an MQTT Broker. When you subscribe to a topic (where the topic name matches a datapoint … Continue reading MQTT Server Interface for WinCC OA? Made with Kotlin \ud83d\ude32<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[67,3],"tags":[54,59,75],"class_list":["post-1435","post","type-post","status-publish","format-standard","hentry","category-mqtt","category-wincc-oa","tag-mqtt","tag-scada","tag-winccoa"],"_links":{"self":[{"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1435"}],"version-history":[{"count":3,"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1435\/revisions"}],"predecessor-version":[{"id":1439,"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1435\/revisions\/1439"}],"wp:attachment":[{"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rocworks.at\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}