{"id":122,"date":"2016-10-30T13:18:01","date_gmt":"2016-10-30T07:48:01","guid":{"rendered":"http:\/\/madhurendra.com\/?p=122"},"modified":"2019-09-17T21:21:19","modified_gmt":"2019-09-17T15:51:19","slug":"kindle-universal-dashboard-jailbreak","status":"publish","type":"post","link":"https:\/\/madhurendra.com\/kindle-universal-dashboard-jailbreak\/","title":{"rendered":"Kindle Universal Dashboard"},"content":{"rendered":"<style>\n.wp-video {<br \/>\ttext-align: center;<br \/>\tmargin-left: auto;<br \/>\tmargin-right: auto;<br \/>}<br \/><\/style>\n<p>Kindle is Super awesome !<\/p>\n<p>Because of its e-ink display. I wanted a display to\u00a0present data which has\u00a0&#8211; Least power consumption, Not painful to eyes &amp; obviously one which doesn&#8217;t emit blue light.<br \/>\nE-Ink displays fit perfectly to my requirement &#8211; acquiring a display which can be driven using Raspberry Pi or Arduino is hard, size\/cost ratio is much higher.<\/p>\n<p>On googling I found some display modules which were more or near to 70-80$ &#8211; even smaller display &#8211; which impulsed me to get a Kindle Touch (8th Generation) at around 74$ approx.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/wp.tik.co\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_120305.jpg?ssl=1\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\" wp-image-123 alignleft\" src=\"https:\/\/i0.wp.com\/wp.tik.co\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_120305-300x169.jpg?resize=405%2C228&#038;ssl=1\" alt=\"Kindle - Madhurendra\" width=\"405\" height=\"228\" title=\"\" srcset=\"\/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_120305.jpg?resize=300%2C169&amp;ssl=1 300w, \/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_120305.jpg?resize=768%2C432&amp;ssl=1 768w, \/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_120305.jpg?resize=1024%2C576&amp;ssl=1 1024w, \/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_120305.jpg?w=1500&amp;ssl=1 1500w, \/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_120305.jpg?w=2250&amp;ssl=1 2250w\" sizes=\"(max-width: 405px) 100vw, 405px\" data-recalc-dims=\"1\" \/><\/a>Kindle comes with an experimental browser but it is narrowed version of WebKit, which is pretty useful if you want to display static content or just want to make a control panel, it can easily render normal websites which use js\/CSS &amp; works pretty well.\u00a0But support for HTML5 is almost absent\u00a0&#8211; so you can&#8217;t use WebSockets to push data, using long polling\/fast polling is only solutions so far.<\/p>\n<p>Moreover, there was another problem which I had to fix\u00a0&#8211;\u00a0Kindle has fixed timeout which sends it to sleep mode &#8211; for mine it was 10min, after digging I found you can use `~ds` or similar but for me, nothing worked.<\/p>\n<p>We can only hope that support to remove timeout or change timeout period will be added in future releases. I think old kindle supports.<\/p>\n<p>If you can&#8217;t change timeout or you want to use few other features I suggest you to jailbreak. Follow steps mentioned here\u00a0<a href=\"http:\/\/www.mobileread.com\/forums\/showthread.php?t=275877\" target=\"_blank\" rel=\"noopener\">http:\/\/www.mobileread.com\/forums\/showthread.php?t=275877<\/a> , Don&#8217;t jump, <strong>It works for kindle touch 8th generation. Tried, tested, working ! \u00a0<\/strong>For KT3 you will need to install\u00a0<strong><a href=\"http:\/\/www.mobileread.com\/forums\/showthread.php?t=251143\" target=\"_blank\" rel=\"noopener\">MRPI<\/a><\/strong> along with<a href=\"http:\/\/www.mobileread.com\/forums\/showthread.php?t=203326\" target=\"_blank\" rel=\"noopener\">\u00a0<strong>KUAL<\/strong><\/a>. Once done your kindle is officially out of warranty\u00a0\ud83d\ude00 . Post that you need to install\u00a0<a href=\"http:\/\/www.mobileread.com\/forums\/showthread.php?t=186645\" target=\"_blank\" rel=\"noopener\"><strong>USBNet<\/strong><\/a>\u00a0&#8211; it will \u00a0allow you to ssh to your kindle. \u00a0All this will allow you to execute &#8220;<strong>lipc-set-prop com.lab126.powerd preventScreenSaver 1&#8243;<\/strong> this on the kindle. It will simply disable screensaver. \ud83d\ude42<\/p>\n<p>Once you have your kindle whose screen doesn&#8217;t lock\u00a0you can simply go &amp; execute \u00a0a simple nodejs script to push data.<\/p>\n<p><strong>Note : Kindle doesn&#8217;t support\u00a0WebSocket &amp; none of transport methods in socket.io except &#8220;polling&#8221;.\u00a0<\/strong><\/p>\n<p>Below is <strong>nodejs\u00a0server<\/strong> code :<\/p>\n<pre class=\"lang:js decode:true\">var http = require('http'),\n\tfs = require('fs');\n\t\/\/sanitize = require('validator').sanitize;\n\t\nvar app = http.createServer(function (request, response) {\n\tfs.readFile(\"client.html\", 'utf-8', function (error, data) {\n\t\tresponse.writeHead(200, {'Content-Type': 'text\/html'});\n\t\tresponse.write(data);\n\t\tresponse.end();\n\t});\n}).listen(1337);\n\nvar io = require('socket.io')({\n    \"polling duration\": 60,\n    'log level' :1\n}).listen(app);\n\nio.set('transports', [ 'polling']);\n\nio.sockets.on('connection', function(socket) { \n\tsocket.on('message_to_server', function(data) { \n\t\tvar escaped_message = (data[\"message\"]);\n\t\tio.sockets.emit(\"message_to_client\",{ message: escaped_message }); \n\t});\n});\n<\/pre>\n<p>Below is code of client.html<\/p>\n<pre class=\"lang:default decode:true\">&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n\t&lt;head&gt;\n\t\t&lt;script src=\"\/socket.io\/socket.io.js\"&gt;&lt;\/script&gt;\n\t\t&lt;script type=\"text\/javascript\"&gt;\n\t\t\tvar socketio = io.connect();\n\n\t\t\tsocketio.on(\"message_to_client\", function(data) {\n\t\t\t\tdocument.getElementById(\"chatlog\").innerHTML = (\"&lt;hr\/&gt;\" + data['message'] + document.getElementById(\"chatlog\").innerHTML);\n\t\t\t});\n\n\t\t\tfunction sendMessage() {\n\t\t\t\tvar msg = document.getElementById(\"message_input\").value;\n\t\t\t\tsocketio.emit(\"message_to_server\", { message : msg});\n\t\t\t}\n\t\t&lt;\/script&gt;\n\t&lt;\/head&gt;\n\t&lt;body&gt;\n\t\t&lt;input type=\"text\" id=\"message_input\"\/&gt;\n\t\t&lt;button onclick=\"sendMessage()\"&gt;send&lt;\/button&gt;\n\t\t&lt;div id=\"chatlog\"&gt;&lt;\/div&gt;\n\t&lt;\/body&gt;\n&lt;\/html&gt;\n<\/pre>\n<p>Voila &#8211; It works !<\/p>\n<p>Below is video of working \u00a0in case you want to see demo before getting hands dirty \ud83d\ude42<\/p>\n<div style=\"width: 300px;\" class=\"wp-video\"><!--[if lt IE 9]><script>document.createElement('video');<\/script><![endif]-->\n<video class=\"wp-video-shortcode\" id=\"video-122-1\" width=\"300\" height=\"500\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/wp.tik.co\/wp-content\/uploads\/sites\/4\/2016\/10\/output_file.mp4?_=1\" \/><a href=\"https:\/\/wp.tik.co\/wp-content\/uploads\/sites\/4\/2016\/10\/output_file.mp4\" target=\"_blank\" rel=\"noopener\">https:\/\/wp.tik.co\/wp-content\/uploads\/sites\/4\/2016\/10\/output_file.mp4<\/a><\/video><\/div>\n<p><strong>Warning &amp; Update :<\/strong> This method might consume more power than expected, as experimental browser has loading status &#8211; which continuously refreshes a section of the\u00a0screen. To overcome this problem I will be polling server with long interval difference &#8211; which will be adjustable by the\u00a0server.<\/p>\n<p><strong>Note for nerds :\u00a0<\/strong> Since this method uses browser &#8211; it&#8217;s more flexible &#8211; but if you are possessive about power consumption &amp; screen space &#8211; You can use JAVA to develop kindlet application. Lightweight pub\/sub protocols like MQTT\u00a0should help you in the\u00a0way.<\/p>\n<p><b><br \/>\n<a href=\"https:\/\/i0.wp.com\/wp.tik.co\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_124622-e1477813645711.jpg?ssl=1\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"size-medium wp-image-129 alignright\" src=\"https:\/\/i0.wp.com\/wp.tik.co\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_124622-e1477813645711-166x300.jpg?resize=166%2C300&#038;ssl=1\" alt=\"photo_20161030_124622\" width=\"166\" height=\"300\" title=\"\" srcset=\"\/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_124622-e1477813645711.jpg?resize=166%2C300&amp;ssl=1 166w, \/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_124622-e1477813645711.jpg?resize=768%2C1385&amp;ssl=1 768w, \/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_124622-e1477813645711.jpg?resize=568%2C1024&amp;ssl=1 568w, \/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_124622-e1477813645711.jpg?w=1955&amp;ssl=1 1955w, \/\/i0.wp.com\/madhurendra.com\/wp-content\/uploads\/sites\/4\/2016\/10\/PHOTO_20161030_124622-e1477813645711.jpg?w=1500&amp;ssl=1 1500w\" sizes=\"(max-width: 166px) 100vw, 166px\" data-recalc-dims=\"1\" \/><\/a>Designing a wall holder :\u00a0<\/b>You can google for covers or design own or use some double sided foam tape. Since i had access to 3d printer i got two of <a href=\"http:\/\/www.thingiverse.com\/thing:832273\" target=\"_blank\" rel=\"noopener\">http:\/\/www.thingiverse.com\/thing:832273<\/a>\u00a0printed &amp; hung it on the\u00a0wall &#8211; it just helped me in reading few books apart from using it only as display. SWAP! \u00a0\u00a0<strong>\u00a0<\/strong><\/p>\n<p><strong>Use it as :<\/strong><\/p>\n<ul>\n<li>Scoreboard<\/li>\n<li>Notification<\/li>\n<li>Weather system<\/li>\n<li>Wallpaper slideshow<\/li>\n<li>News\/RSS feeds display<\/li>\n<li>Home automation control<\/li>\n<li>Anything<\/li>\n<li>Book reader \ud83d\ude42<\/li>\n<\/ul>\n<p>At the end, even if you place it behind your monitor it won&#8217;t hurt or push the new data to your eyes &amp; spoil the code castle you were building.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kindle is Super awesome ! Because of its e-ink display. I wanted a display to\u00a0present data which has\u00a0&#8211; Least power consumption, Not painful to eyes &amp; obviously one which doesn&#8217;t emit blue light. E-Ink displays fit perfectly to my requirement &#8211; acquiring a display which can be driven using Raspberry Pi or Arduino is hard, &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/madhurendra.com\/kindle-universal-dashboard-jailbreak\/\">Continue reading<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[13,3,6,8],"tags":[29,28,27,11],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pciGs2-1Y","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/posts\/122"}],"collection":[{"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/comments?post=122"}],"version-history":[{"count":24,"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/posts\/122\/revisions"}],"predecessor-version":[{"id":255,"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/posts\/122\/revisions\/255"}],"wp:attachment":[{"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/media?parent=122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/categories?post=122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/madhurendra.com\/wp-json\/wp\/v2\/tags?post=122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}