{"id":870,"date":"2025-03-03T15:27:39","date_gmt":"2025-03-03T13:27:39","guid":{"rendered":"https:\/\/blog.gentz.com.de\/bloggentz\/?p=870"},"modified":"2025-03-03T16:56:08","modified_gmt":"2025-03-03T14:56:08","slug":"knx-smart-home-2-0-a-decade-later","status":"publish","type":"post","link":"https:\/\/gentz.cloud\/?p=870","title":{"rendered":"KNX Smart Home 2.0 \u2013 A Decade Later"},"content":{"rendered":"\n<p>Over ten years ago, I wrote about my first experience with <a href=\"https:\/\/blog.gentz.com.de\/bloggentz\/?p=234\" data-type=\"post\" data-id=\"234\">KNX home automation<\/a> when building our previous house. Now, as we embark on a new construction project, I am once again committed to implementing KNX <strong>but this time with even more features and a refined approach.<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"458\" src=\"https:\/\/blog.gentz.com.de\/bloggentz\/wp-content\/uploads\/2025\/03\/image-2-1024x458.png\" alt=\"\" class=\"wp-image-887\" srcset=\"https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-2-1024x458.png 1024w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-2-300x134.png 300w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-2-768x344.png 768w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-2.png 1240w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-text-align-center\">The new construction project &#8211; Quinta do Brejo<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why KNX Again?<\/h3>\n\n\n\n<p>KNX has proven to be a reliable and future-proof home automation standard. Even after a decade, I can still highly recommend it. However, this time, I am outsourcing the KNX programming to <strong><a href=\"https:\/\/finiluz.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Finluz<\/a><\/strong>, as I simply don\u2019t have the time to do it myself and also lack the necessary skills to complete it in a cost-efficient manner (both in terms of time and achieving the desired results). That said, the entire planning process has been handled by me, and I am excited to see it come to life.<\/p>\n\n\n\n<p>I am hiring <a href=\"https:\/\/finiluz.com\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Finluz<\/strong> <\/a>to ensure that extensive logic functions are implemented. This includes features such as <strong>preventing shutters from closing if windows are open<\/strong>, <strong>lighting control based on presence detection combined with brightness sensors<\/strong>, as well as <strong>central &#8216;all-off&#8217; buttons, scene control, and more<\/strong>. These advanced automation features will significantly enhance the usability and efficiency of the system.<\/p>\n\n\n\n<p>Honestly, I can&#8217;t quite understand why people still build houses today <strong>without<\/strong> KNX! Given the flexibility, expandability, and reliability of KNX, it should be a <strong>standard<\/strong> in every new build.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">The New KNX Setup<\/h3>\n\n\n\n<p>For our new home, I have planned the infrastructure to be as flexible as possible, incorporating lessons learned from my previous installation:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Electrical Infrastructure:<\/strong> Every room will have <strong>NYM-J 5&#215;1.5mm\u00b2<\/strong> wiring and <a href=\"https:\/\/www.kaiser-elektro.de\/de_DE\/produkte\/elektro-installation\/unterputz\/geraetedosen-geraete-verbindungsdosen\/6\/electronic-dose-mit-trennwand\" target=\"_blank\" rel=\"noreferrer noopener\">Electronics box with separator wall<\/a>, ensuring expandability for future automation needs.<\/li>\n\n\n\n<li><strong>Shutter Control:<\/strong> The roller shutter control will again be decentralized.<\/li>\n\n\n\n<li><strong>Heating System:<\/strong> This time, heating will be <strong>centrally controlled per house section<\/strong> (total three sections).<\/li>\n\n\n\n<li><strong>Lighting:<\/strong> Unlike before, the entire lighting system will be <strong>DALI-based<\/strong>, with full LED integration. The house will feature <strong>OldoLED LED spots<\/strong> powered by <strong>MEANWELL<\/strong> drivers, offering RGBW capability.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"824\" src=\"https:\/\/blog.gentz.com.de\/bloggentz\/wp-content\/uploads\/2025\/03\/image-1024x824.png\" alt=\"\" class=\"wp-image-871\" srcset=\"https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-1024x824.png 1024w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-300x241.png 300w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-768x618.png 768w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-1536x1235.png 1536w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image.png 1609w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"554\" src=\"https:\/\/blog.gentz.com.de\/bloggentz\/wp-content\/uploads\/2025\/03\/image-1-1024x554.png\" alt=\"\" class=\"wp-image-872\" srcset=\"https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-1-1024x554.png 1024w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-1-300x162.png 300w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-1-768x416.png 768w, https:\/\/gentz.cloud\/wp-content\/uploads\/2025\/03\/image-1.png 1438w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Network and System Architecture<\/h3>\n\n\n\n<p>This time, I am taking a more structured approach to the KNX network:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Two KNX lines<\/strong> (without backbone line) with <strong>three segments<\/strong> (two internal, one external). The segmentation was necessary due to <strong>voltage issues<\/strong>, which required splitting the lines for stability.\n<ul class=\"wp-block-list\">\n<li>Line 1.1 Seg A (Internal)<\/li>\n\n\n\n<li>Line 1.1 Seg B (Internal)<\/li>\n\n\n\n<li>Line 1.2 Seg A (External)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Full integration of all systems<\/strong>, including:\n<ul class=\"wp-block-list\">\n<li>Heating system<\/li>\n\n\n\n<li>Air conditioning<\/li>\n\n\n\n<li>Controlled ventilation (KWL)<\/li>\n\n\n\n<li>Irrigation system<\/li>\n\n\n\n<li>Pool control<\/li>\n\n\n\n<li>etc&#8230;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">The Heart of the System<\/h3>\n\n\n\n<p>As before, I am using the <strong>Gira HomeServer<\/strong>, which has proven its reliability and stability over the past ten years. It remains my top recommendation for centralizing KNX automation.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Switching &amp; Control<\/h3>\n\n\n\n<p>For switch operation, I am moving from the <strong>Gira Tastsensor 3 Komfort<\/strong> to the <strong>Merten Tastsensor Flex<\/strong>. The key difference? Instead of paper labels, the new switches use a <strong>digital display<\/strong>, making them much more adaptable and visually appealing.<\/p>\n\n\n\n<p>Over the years, I tested a <strong>touchscreen-based KNX switch<\/strong>, but it didn\u2019t prove practical for daily use. Physical buttons remain essential, as evidenced by user experience studies in the automotive industry such as the <strong>ADAC report on Tesla\u2019s touch controls<\/strong> (<a href=\"https:\/\/www.adac.de\/rund-ums-fahrzeug\/ausstattung-technik-zubehoer\/ausstattung\/ablenkung-durch-bedienelemente\/\">link<\/a>).<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cost Optimization<\/h3>\n\n\n\n<p>From my previous project, I already gained experience in sourcing KNX hardware cost-effectively. Once again, I have purchased most of the KNX components via <strong>(eBay) Kleinanzeigen, Facebook<\/strong> and <strong>eBay<\/strong>, reducing costs by approximately <strong>45%<\/strong> compared to new components. The only missing piece at the moment is the <strong>KNX switches<\/strong>, for which I am still hunting for a good deal.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion<\/h3>\n\n\n\n<p>A decade later, my approach to KNX remains the same <strong>build a solid infrastructure<\/strong> that allows for future upgrades and seamless expansion.<\/p>\n\n\n\n<p><strong>I&#8217;d like to thank <a href=\"https:\/\/www.ing-beyer.de\/\" target=\"_blank\" rel=\"noreferrer noopener\">Ingenieurb\u00fcro Beyer<\/a> again<\/strong>, who originally introduced me to KNX and laid the foundation for my firm belief that building a new home without KNX just doesn&#8217;t make sense. <strong>This is exactly why I&#8217;m implementing it again today!<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Over ten years ago, I wrote about my first experience with KNX home automation when building our previous house. Now, as we embark on a new construction project, I am once again committed to implementing KNX but this time with even more features and a refined approach. The new construction project &#8211; Quinta do Brejo<\/p><\/div>\n<div class=\"blog-btn\"><a href=\"https:\/\/gentz.cloud\/?p=870\" class=\"home-blog-btn\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-870","post","type-post","status-publish","format-standard","hentry","category-opinions"],"_links":{"self":[{"href":"https:\/\/gentz.cloud\/index.php?rest_route=\/wp\/v2\/posts\/870","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gentz.cloud\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gentz.cloud\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gentz.cloud\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gentz.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=870"}],"version-history":[{"count":17,"href":"https:\/\/gentz.cloud\/index.php?rest_route=\/wp\/v2\/posts\/870\/revisions"}],"predecessor-version":[{"id":895,"href":"https:\/\/gentz.cloud\/index.php?rest_route=\/wp\/v2\/posts\/870\/revisions\/895"}],"wp:attachment":[{"href":"https:\/\/gentz.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=870"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gentz.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=870"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gentz.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}