{"id":5463,"date":"2014-05-10T15:45:25","date_gmt":"2014-05-10T13:45:25","guid":{"rendered":"http:\/\/www.gsm-modem.de\/M2M\/?p=5463"},"modified":"2014-10-29T13:37:43","modified_gmt":"2014-10-29T12:37:43","slug":"home-automation-bluetooth-bl","status":"publish","type":"post","link":"http:\/\/www.gsm-modem.de\/M2M\/m2m-faq\/home-automation-bluetooth-bl\/","title":{"rendered":"Home Automation application on Bluetooth 4.1"},"content":{"rendered":"<h2>Presentation about Home Automation on Bluetooth Low Energy &#8211; Bluetooth 4.1<\/h2>\n<div id=\"attachment_5462\" style=\"width: 410px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.gsm-modem.de\/M2M\/?attachment_id=5462\" rel=\"attachment wp-att-5462\"><img aria-describedby=\"caption-attachment-5462\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-5462\" title=\"Bluetooth-low-energy-beacon-at-smart-home_CH\" src=\"http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2014\/05\/Bluetooth-low-energy-beacon-at-smart-home_CH-400x300.jpg\" alt=\"Home Automation system on Bluetooth 4.1\" width=\"400\" height=\"300\" srcset=\"http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2014\/05\/Bluetooth-low-energy-beacon-at-smart-home_CH-400x300.jpg 400w, http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2014\/05\/Bluetooth-low-energy-beacon-at-smart-home_CH.jpg 640w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><p id=\"caption-attachment-5462\" class=\"wp-caption-text\">Home Automation system on Bluetooth 4.1<\/p><\/div>\n<p>The picture shows a<\/p>\n<div id=\"attachment_5472\" style=\"width: 410px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.gsm-modem.de\/M2M\/?attachment_id=5472\" rel=\"attachment wp-att-5472\"><img aria-describedby=\"caption-attachment-5472\" decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-5472\" title=\"Bluetooth-low-energy-beacon-at-smart-home_\" src=\"http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2014\/05\/Bluetooth-low-energy-beacon-at-smart-home_-400x274.jpg\" alt=\"Home Automation system on Bluetooth 4.1\" width=\"400\" height=\"274\" srcset=\"http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2014\/05\/Bluetooth-low-energy-beacon-at-smart-home_-400x274.jpg 400w, http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2014\/05\/Bluetooth-low-energy-beacon-at-smart-home_-1024x702.jpg 1024w, http:\/\/www.gsm-modem.de\/M2M\/.\/wp-content\/uploads\/2014\/05\/Bluetooth-low-energy-beacon-at-smart-home_.jpg 1095w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><p id=\"caption-attachment-5472\" class=\"wp-caption-text\">Home Automation system on Bluetooth 4.1<\/p><\/div>\n<p>proposal for a home automation system on the new specification of Bluetooth 4.1. BT 4.1 describes a hub on Bluetooth Low Energy. A Bluetooth Low Energy device could be a master and slave in same time. Master and slave is already the wrong word. At BLE this is called central and peripheral. At BT 2.1 we had something called scatternet. <a href=\"http:\/\/en.wikipedia.org\/wiki\/Scatternet\">http:\/\/en.wikipedia.org\/wiki\/Scatternet<\/a><\/p>\n<p>In year 2008 the was some experiments with large scatternets can at <a title=\"ETH Zurich\" href=\"http:\/\/en.wikipedia.org\/wiki\/ETH_Zurich\">ETH Zurich<\/a> in the <a title=\"BTnode project (page does not exist)\" href=\"http:\/\/www.btnode.ethz.ch\/\">BTnode project<\/a><br \/>\nThe scatternet will get a recall for sure. Any smart watch or bike computer at bicycle will communicate to e.g. a heart rate belt, a sensor at the pedal and a sensor for the speed. In professional sport they have sensors for the tire pressure as well. All sensors will run in peripheral mode and the smart watch or bike computer will run central mode. If the recorded data has to be forwarded to a computer or a smartphone, then these devices will run in central mode. That means that the watch or bike computer has to run in slave mode. The smart watch or the bike computer has to be able to support both. In a scatternet we have the same situation. In scatternet we will find multi masters and we are able to create networks in network topology in a tree.<\/p>\n<p>If you have further questions, then do not hestitate to drop an email to harald.naumann (at) gsm-modem.de .<\/p>\n<div class=\"shariff shariff-align-left shariff-widget-align-left\"><ul class=\"shariff-buttons theme-default orientation-horizontal buttonsize-small\"><li class=\"shariff-button twitter shariff-nocustomcolor\" style=\"background-color:#595959\"><a href=\"https:\/\/twitter.com\/share?url=http%3A%2F%2Fwww.gsm-modem.de%2FM2M%2Fm2m-faq%2Fhome-automation-bluetooth-bl%2F&text=Home%20Automation%20application%20on%20Bluetooth%204.1\" title=\"Share on X\" aria-label=\"Share on X\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#000; color:#fff\" target=\"_blank\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\"><path fill=\"#000\" d=\"M14.258 10.152L23.176 0h-2.113l-7.747 8.813L7.133 0H0l9.352 13.328L0 23.973h2.113l8.176-9.309 6.531 9.309h7.133zm-2.895 3.293l-.949-1.328L2.875 1.56h3.246l6.086 8.523.945 1.328 7.91 11.078h-3.246zm0 0\"\/><\/svg><\/span><span class=\"shariff-text\">share<\/span>&nbsp;<\/a><\/li><li class=\"shariff-button facebook shariff-nocustomcolor\" style=\"background-color:#4273c8\"><a href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=http%3A%2F%2Fwww.gsm-modem.de%2FM2M%2Fm2m-faq%2Fhome-automation-bluetooth-bl%2F\" title=\"Share on Facebook\" aria-label=\"Share on Facebook\" role=\"button\" rel=\"nofollow\" class=\"shariff-link\" style=\"; 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BT 4.1 describes a hub on Bluetooth Low Energy. A Bluetooth Low Energy device could be a master and slave in same time. Master and slave is [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":5462,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[3],"tags":[31],"aioseo_notices":[],"_links":{"self":[{"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/posts\/5463"}],"collection":[{"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/comments?post=5463"}],"version-history":[{"count":15,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/posts\/5463\/revisions"}],"predecessor-version":[{"id":5806,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/posts\/5463\/revisions\/5806"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/media\/5462"}],"wp:attachment":[{"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/media?parent=5463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/categories?post=5463"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gsm-modem.de\/M2M\/wp-json\/wp\/v2\/tags?post=5463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}