{"id":906,"date":"2016-12-08T04:15:13","date_gmt":"2016-12-07T19:15:13","guid":{"rendered":"http:\/\/blog.hi-farm.net\/?p=906"},"modified":"2016-12-08T04:18:43","modified_gmt":"2016-12-07T19:18:43","slug":"wireless-communication-trouble","status":"publish","type":"post","link":"http:\/\/blog.hi-farm.net\/en\/2016\/12\/08\/wireless-communication-trouble\/","title":{"rendered":"Crosstalk problem wireless devices and venue"},"content":{"rendered":"<div class='wp_social_bookmarking_light'>\n            <div class=\"wsbl_hatena_button\"><a href=\"\/\/b.hatena.ne.jp\/entry\/http:\/\/blog.hi-farm.net\/en\/2016\/12\/08\/wireless-communication-trouble\/\" class=\"hatena-bookmark-button\" data-hatena-bookmark-title=\"Crosstalk problem wireless devices and venue\" data-hatena-bookmark-layout=\"standard\" title=\"\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0\"> <img src=\"\/\/b.hatena.ne.jp\/images\/entry-button\/button-only@2x.png\" alt=\"\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0\" width=\"20\" height=\"20\" style=\"border: none;\" \/><\/a><script type=\"text\/javascript\" src=\"\/\/b.hatena.ne.jp\/js\/bookmark_button.js\" charset=\"utf-8\" async=\"async\"><\/script><\/div>\n            <div class=\"wsbl_twitter\"><a href=\"https:\/\/twitter.com\/share\" class=\"twitter-share-button\" data-url=\"http:\/\/blog.hi-farm.net\/en\/2016\/12\/08\/wireless-communication-trouble\/\" data-text=\"Crosstalk problem wireless devices and venue\" data-via=\"mmlemon\" data-lang=\"ja\">Tweet<\/a><\/div>\n            <div class=\"wsbl_facebook_like\"><div id=\"fb-root\"><\/div><fb:like href=\"http:\/\/blog.hi-farm.net\/en\/2016\/12\/08\/wireless-communication-trouble\/\" layout=\"button_count\" action=\"like\" width=\"100\" share=\"false\" show_faces=\"false\" ><\/fb:like><\/div>\n            <div class=\"wsbl_facebook_send\"><div id=\"fb-root\"><\/div><fb:send href=\"http:\/\/blog.hi-farm.net\/en\/2016\/12\/08\/wireless-communication-trouble\/\" colorscheme=\"light\" ><\/fb:send><\/div>\n            <div class=\"wsbl_tumblr\"><a href=\"\/\/www.tumblr.com\/share?v=3&u=http%3A%2F%2Fblog.hi-farm.net%2Fen%2F2016%2F12%2F08%2Fwireless-communication-trouble%2F&t=Crosstalk%20problem%20wireless%20devices%20and%20venue\" title=\"Share on Tumblr\" style=\"display:inline-block; 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margin-left: 10px;\"><a href=\"https:\/\/twitter.com\/share\" class=\"twitter-share-button\" data-count=\"vertical\" data-url=\"http:\/\/blog.hi-farm.net\/en\/2016\/12\/08\/wireless-communication-trouble\/\">Tweet<\/a><\/div>\nI do not know if it&#8217;s fashion or not, but <a href=\"http:\/\/hi-farm.net\/detail\/2015\/05\/08\/xbee\/\" target=\"_blank\"> XBee <\/a> or Bluetooth , Wifi etc. Recently, the use of wireless is increasing.<br \/>\nI think that it is becoming the direction to wirelessize as a global flow as well.<\/p>\n<p>I think I will write about the problem of crosstalk which will always make troubles in using wireless devices this time.<\/p>\n<p><Hr \/><br \/>\nI make and use a system that controls the lighting of the LED wirelessly.<br \/>\nSynchronization with sound is very important as it is live.<br \/>\nEven if it is misaligned, it will feel a big incongruity if it is not very small error such as 0.016 &#8211; 0.032 seconds.<\/p>\n<p>In addition, LED wireless control basically uses XBee.<br \/>\nHowever, XBee communicates using the frequency of the 2.4 GHz band.<br \/>\nIn the 2.4 GHz band, mobile phones and various Wifi devices (recently 5 GHz ones are still pretty much used but still more mainstream), Bluetooth devices, microwave ovens, etc. are running at the same frequency, and in some cases It becomes a confrontation of the frequency band.<\/p>\n<p>As you can see from that, there is a high possibility of crowding at live shows and exhibitions, etc., where there are lots of people,<br \/>\nI am trying to preliminarily test it at a big venue.<\/p>\n<p>By the way, as a result of the control equipment we made, the live at Tokyo gymnasium operated at the biggest venue without problems.<br \/>\nOf course, I was not able to enter the person yet, I brought the distance of the transmitter \/ receiver closer and made other ingenuity.<\/p>\n<p>Besides that, at the exhibition which is done at the big site, etc., the distance between the booths is close, and there are many exhibits of wireless technology, I think whether it is the most severe environment in a sense.<\/p>\n<p>Moreover, there are many cases where problems do not occur unless it is during the exhibition period, which is a risk factor.<br \/>\nOn the setup day, although it was working without problems, it does not move as soon as it opens, even if it moves, the delay is severe, etc. happen.<\/p>\n<p>In order not to panic with sudden troubles,<br \/>\n\u00b7 Confirm the degree of crosstalk of radio during pre-session if possible<br \/>\n\u00b7 When there are many radio disturbances, consider ways to create an environment to block wired or communication<br \/>\n\u00b7 Prepare high-power radio equipment that can not beat the surrounding radio waves<\/p>\n<p>It will be necessary.<br \/>\nThe last one can not be handled without wireless qualification.<\/p>\n<p>To that end, we have acquired <a href=\"http:\/\/blog.hi-farm.net\/2016\/12\/07\/rikujyo-musen-3kyu\/\"> wireless qualification <\/a>.<br \/>\nIt is something that I would like to be able to respond more flexibly, such as attaching a function that can be switched to another frequency band because I got the qualifications with much effort.<\/p>\n<p><P> Please also take a look at the relevant page as well as a link to the explanation and related articles. <br \/>\n<a href=\"http:\/\/hi-farm.net\/detail\/2015\/05\/08\/xbee\/\"> About XBee | hi-farm.net <\/a> <\/ p>","protected":false},"excerpt":{"rendered":"<p>Tweet I do not know if it&#8217;s fashion or not, but XBee or Bluetooth , Wifi etc. Recently, the use of wirel &hellip; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[211],"tags":[],"_links":{"self":[{"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/posts\/906"}],"collection":[{"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/comments?post=906"}],"version-history":[{"count":14,"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/posts\/906\/revisions"}],"predecessor-version":[{"id":920,"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/posts\/906\/revisions\/920"}],"wp:attachment":[{"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/media?parent=906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/categories?post=906"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.hi-farm.net\/en\/wp-json\/wp\/v2\/tags?post=906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}