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Description: I wrote a script that connects to HDMI CEC ( cec-client needed ) and listens for TV Remote key presses. Based on the keys pressed / released (or auto-released; holding down certain keys for too long makes them auto-release) different actions are executed. Some examples: write letters and numbers using 0-9 keys (simulating 3x4 keypad phones - key "2" switches between a-b-c-2, key 9 switches between w-x-y-z-9) ( xdotool needed ) move mouse cursor using up/down/left..."> +<meta name="twitter:description" content="Hello everyone. Description: I wrote a script that connects to HDMI CEC ( cec-client needed ) and listens for TV Remote key presses. Based on the keys pressed / released (or auto-released; holding down certain keys for too long makes them auto-release) different actions are executed. Some examples: write letters and numbers using 0-9 keys (simulating 3x4 keypad phones - key "2" switches between a-b-c-2, key 9 switches between w-x-y-z-9) ( xdotool needed ) move mouse cursor using up/down/left..."> +<meta name="twitter:label1" value="Reading time"> +<meta name="twitter:data1" value="6 mins 🕑"> +<meta name="twitter:label2" value="Likes"> +<meta name="twitter:data2" value="3 ❤"> +<meta property="article:published_time" content="2016-08-11T01:40:52+00:00"> +<meta property="og:ignore_canonical" content="true"> +<script type="application/ld+json">{"@context":"http://schema.org","@type":"QAPage","name":"Controlling Raspberry PI with TV Remote, using HDMI CEC","mainEntity":{"@type":"Question","name":"Controlling Raspberry PI with TV Remote, using HDMI CEC","text":"Hello everyone. \nDescription: \nI wrote a script that connects to HDMI CEC ( cec-client needed ) and listens for TV Remote key presses. Based on the keys pressed / released (or auto-released; holding down certain keys for too long makes them auto-release) different actions are executed. 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class="topic-body clearfix"><div class="topic-meta-data"><div class="names trigger-user-card"><span class="first username"><a href="https://ubuntu-mate.community/u/GizmoXomziG" data-user-card="GizmoXomziG">GizmoXomziG</a></span></div><div class="post-infos"><div class="post-info edits"><a class="wiki" title="post last edited on 10 Aug 2016 21:40" href="#">3 <svg class="fa d-icon d-icon-pencil-square-o svg-icon svg-node" aria-hidden="true"><use xlink:href="#far-edit"></use></svg></a></div><div class="post-info post-date"><a class="post-date last-wiki-edit" href="https://ubuntu-mate.community/t/controlling-raspberry-pi-with-tv-remote-using-hdmi-cec/4250" data-share-url="/t/controlling-raspberry-pi-with-tv-remote-using-hdmi-cec/4250" data-post-number="1"><span title="10 Aug 2016 21:40" data-time="1470879652037" data-format="tiny" class="relative-date">Aug '16</span></a></div><div class="read-state read" title="Post is unread"><svg class="fa d-icon d-icon-circle svg-icon svg-node" aria-hidden="true"><use xlink:href="#circle"></use></svg></div></div></div><div class="regular contents"><div class="cooked"><p>Hello everyone.</p> +<p><strong>Description:</strong><br> +I wrote a script that connects to HDMI CEC ( cec-client needed ) and +listens for TV Remote key presses. Based on the keys pressed / released +(or auto-released; holding down certain keys for too long makes them +auto-release) different actions are executed. Some examples:</p> +<ul> +<li>write letters and numbers using 0-9 keys (simulating 3x4 keypad +phones - key "2" switches between a-b-c-2, key 9 switches between +w-x-y-z-9) ( xdotool needed )</li> +<li>move mouse cursor using up/down/left/right (the longer you hold the +key down, the faster it goes) and click (enter = left click; channels +list = right click) ( xdotool needed )</li> +<li>opening web sites in chomium (red key for YouTube, green for Google, blue for incognito window)</li> +</ul> +<p>If you want to use firefox instead of chromium, replace "chromium" with "firefox" in the script below.<br> +Alternatively, you can just install chromium:</p> +<pre><code class="hljs">sudo apt-get install chromium-browser +</code></pre> +<p>See all the available keys below:</p> +<p></p><div class="lightbox-wrapper"><a class="lightbox" href="https://ubuntu-mate.community/uploads/default/original/2X/e/e00e46bb720d634bb6a2ba84cad84c05078fd391.png" data-download-href="https://ubuntu-mate.community/uploads/default/e00e46bb720d634bb6a2ba84cad84c05078fd391" title="TVRemoteCECpng.png"><img src="RaspberryPITVHDMI_archivos/e00e46bb720d634bb6a2ba84cad84c05078fd391_2_401x500.png" class="d-lazyload" srcset="https://ubuntu-mate.community/uploads/default/optimized/2X/e/e00e46bb720d634bb6a2ba84cad84c05078fd391_2_401x500.png, https://ubuntu-mate.community/uploads/default/optimized/2X/e/e00e46bb720d634bb6a2ba84cad84c05078fd391_2_601x750.png 1.5x, https://ubuntu-mate.community/uploads/default/optimized/2X/e/e00e46bb720d634bb6a2ba84cad84c05078fd391_2_802x1000.png 2x" width="401" height="500"><div class="meta"> +<svg class="fa d-icon d-icon-far-image svg-icon" aria-hidden="true"><use xlink:href="#far-image"></use></svg><span class="filename">TVRemoteCECpng.png</span><span class="informations">828×1030 101 KB</span><svg class="fa d-icon d-icon-discourse-expand svg-icon" aria-hidden="true"><use xlink:href="#discourse-expand"></use></svg> +</div></a></div><p></p> +<p>These are the keys supported by my TV Remote. You can modify the script for your TV Remote, see Modification below.</p> +<p><strong>Installation:</strong><br> +First you need to install cec-client and xdotool; using terminal:</p> +<pre><code class="hljs">sudo apt-get install cec-client xdotool +</code></pre> +<p>Test if you can receive TV Remote button presses with cec-client; using terminal:</p> +<pre><code class="hljs">cec-client +</code></pre> +<p>You should see some diagnostic messages. Press numeric keys (as they +are most likely to be supported) on your TV Remote. Watch out for new +lines, especially of this form:</p> +<pre><code class="hljs markdown">something something <span class="hljs-strong">**key pressed: 8**</span> something something +</code></pre> +<p>If you see this kind of messages, then this should work for you.<br> +If not, make sure you've got CEC enabled on your TV (see this <a href="http://kodi.wiki/view/CEC#Trade_names" rel="nofollow noopener">WIKI <span class="badge badge-notification clicks" title="99 clicks">99</span></a> for more info).<br> +For my TV, pressing the Source button a couple of times helped (so it +kind-of flips trough all the sources and circles back to the Raspberry +Pi, detects CEC and connects to it).</p> +<p>So, on to the script / installation:<br> +Create the file cecremote.sh and mark it as executable; using terminal:</p> +<pre><code class="hljs css"><span class="hljs-selector-tag">touch</span> <span class="hljs-selector-tag">cecremote</span><span class="hljs-selector-class">.sh</span> +<span class="hljs-selector-tag">chmod</span> +<span class="hljs-selector-tag">x</span> <span class="hljs-selector-tag">cecremote</span><span class="hljs-selector-class">.sh</span> +</code></pre> +<p>Then open it; using terminal:</p> +<pre><code class="hljs css"><span class="hljs-selector-tag">nano</span> <span class="hljs-selector-tag">cecremote</span><span class="hljs-selector-class">.sh</span> +</code></pre> +<p>Copy - paste this in the file:</p> +<pre><code class="hljs bash"><span class="hljs-meta">#!/bin/bash</span> +<span class="hljs-keyword">function</span> keychar { + parin1=<span class="hljs-variable">$1</span> <span class="hljs-comment">#first param; abc1</span> + parin2=<span class="hljs-variable">$2</span> <span class="hljs-comment">#second param; 0=a, 1=b, 2=c, 3=1, 4=a, ...</span> + parin2=$((parin2)) <span class="hljs-comment">#convert to numeric</span> + parin1len=<span class="hljs-variable">${#parin1}</span> <span class="hljs-comment">#length of parin1</span> + parin2pos=$((parin2 % parin1len)) <span class="hljs-comment">#position mod</span> + char=<span class="hljs-variable">${parin1:parin2pos:1}</span> <span class="hljs-comment">#char key to simulate</span> + <span class="hljs-keyword">if</span> [ <span class="hljs-string">"<span class="hljs-variable">$parin2</span>"</span> -gt 0 ]; <span class="hljs-keyword">then</span> <span class="hljs-comment">#if same key pressed multiple times, delete previous char; write a, delete a write b, delete b write c, ...</span> + xdotool key <span class="hljs-string">"BackSpace"</span> + <span class="hljs-keyword">fi</span> + <span class="hljs-comment">#special cases for xdotool ( X Keysyms )</span> + <span class="hljs-keyword">if</span> [ <span class="hljs-string">"<span class="hljs-variable">$char</span>"</span> = <span class="hljs-string">" "</span> ]; <span class="hljs-keyword">then</span> char=<span class="hljs-string">"space"</span>; <span class="hljs-keyword">fi</span> + <span class="hljs-keyword">if</span> [ <span class="hljs-string">"<span class="hljs-variable">$char</span>"</span> = <span class="hljs-string">"."</span> ]; <span class="hljs-keyword">then</span> char=<span class="hljs-string">"period"</span>; <span class="hljs-keyword">fi</span> + <span class="hljs-keyword">if</span> [ <span class="hljs-string">"<span class="hljs-variable">$char</span>"</span> = <span class="hljs-string">"-"</span> ]; <span class="hljs-keyword">then</span> char=<span class="hljs-string">"minus"</span>; <span class="hljs-keyword">fi</span> + xdotool key <span class="hljs-variable">$char</span> +} +datlastkey=$(date +%s%N) +strlastkey=<span class="hljs-string">""</span> +intkeychar=0 +intmsbetweenkeys=2000 <span class="hljs-comment">#two presses of a key sooner that this makes it delete previous key and write the next one (a->b->c->1->a->...)</span> +intmousestartspeed=10 <span class="hljs-comment">#mouse starts moving at this speed (pixels per key press)</span> +intmouseacc=10 <span class="hljs-comment">#added to the mouse speed for each key press (while holding down key, more key presses are sent from the remote)</span> +intmousespeed=10 + +<span class="hljs-keyword">while</span> <span class="hljs-built_in">read</span> oneline +<span class="hljs-keyword">do</span> + keyline=$(<span class="hljs-built_in">echo</span> <span class="hljs-variable">$oneline</span> | grep <span class="hljs-string">" key "</span>) + <span class="hljs-comment">#echo $keyline --- debugAllLines</span> + <span class="hljs-keyword">if</span> [ -n <span class="hljs-string">"<span class="hljs-variable">$keyline</span>"</span> ]; <span class="hljs-keyword">then</span> + datnow=$(date +%s%N) + datdiff=$(((<span class="hljs-variable">$datnow</span> - <span class="hljs-variable">$datlastkey</span>) / 1000000)) <span class="hljs-comment">#bla bla key pressed: previous channel (123)</span> + strkey=$(grep -oP <span class="hljs-string">'(?<=sed: ).*?(?= \()'</span> <<< <span class="hljs-string">"<span class="hljs-variable">$keyline</span>"</span>) <span class="hljs-comment">#bla bla key pres-->sed: >>previous channel<< (<--123)</span> + strstat=$(grep -oP <span class="hljs-string">'(?<=key ).*?(?=:)'</span> <<< <span class="hljs-string">"<span class="hljs-variable">$keyline</span>"</span>) <span class="hljs-comment">#bla bla -->key >>pressed<<:<-- previous channel (123)</span> + strpressed=$(<span class="hljs-built_in">echo</span> <span class="hljs-variable">$strstat</span> | grep <span class="hljs-string">"pressed"</span>) + strreleased=$(<span class="hljs-built_in">echo</span> <span class="hljs-variable">$strstat</span> | grep <span class="hljs-string">"released"</span>) + <span class="hljs-keyword">if</span> [ -n <span class="hljs-string">"<span class="hljs-variable">$strpressed</span>"</span> ]; <span class="hljs-keyword">then</span> + <span class="hljs-comment">#echo $keyline --- debug</span> + <span class="hljs-keyword">if</span> [ <span class="hljs-string">"<span class="hljs-variable">$strkey</span>"</span> = <span class="hljs-string">"<span class="hljs-variable">$strlastkey</span>"</span> ] && [ <span class="hljs-string">"<span class="hljs-variable">$datdiff</span>"</span> -lt <span class="hljs-string">"<span class="hljs-variable">$intmsbetweenkeys</span>"</span> ]; <span class="hljs-keyword">then</span> + intkeychar=$((intkeychar + 1)) <span class="hljs-comment">#same key pressed for a different char</span> + <span class="hljs-keyword">else</span> + intkeychar=0 <span class="hljs-comment">#different key / too far apart</span> + <span class="hljs-keyword">fi</span> + datlastkey=<span class="hljs-variable">$datnow</span> + strlastkey=<span class="hljs-variable">$strkey</span> + <span class="hljs-keyword">case</span> <span class="hljs-string">"<span class="hljs-variable">$strkey</span>"</span> <span class="hljs-keyword">in</span> + <span class="hljs-string">"1"</span>) + xdotool key <span class="hljs-string">"BackSpace"</span> + ;; + <span class="hljs-string">"2"</span>) + keychar <span class="hljs-string">"abc2"</span> intkeychar + ;; + <span class="hljs-string">"3"</span>) + keychar <span class="hljs-string">"def3"</span> intkeychar + ;; + <span class="hljs-string">"4"</span>) + keychar <span class="hljs-string">"ghi4"</span> intkeychar + ;; + <span class="hljs-string">"5"</span>) + keychar <span class="hljs-string">"jkl5"</span> intkeychar + ;; + <span class="hljs-string">"6"</span>) + keychar <span class="hljs-string">"mno6"</span> intkeychar + ;; + <span class="hljs-string">"7"</span>) + keychar <span class="hljs-string">"pqrs7"</span> intkeychar + ;; + <span class="hljs-string">"8"</span>) + keychar <span class="hljs-string">"tuv8"</span> intkeychar + ;; + <span class="hljs-string">"9"</span>) + keychar <span class="hljs-string">"wxyz9"</span> intkeychar + ;; + <span class="hljs-string">"0"</span>) + keychar <span class="hljs-string">" 0.-"</span> intkeychar + ;; + <span class="hljs-string">"previous channel"</span>) + xdotool key <span class="hljs-string">"Return"</span> <span class="hljs-comment">#Enter</span> + ;; + <span class="hljs-string">"channel up"</span>) + xdotool click 4 <span class="hljs-comment">#mouse scroll up</span> + ;; + <span class="hljs-string">"channel down"</span>) + xdotool click 5 <span class="hljs-comment">#mouse scroll down</span> + ;; + <span class="hljs-string">"channels list"</span>) + xdotool click 3 <span class="hljs-comment">#right mouse button click"</span> + ;; + <span class="hljs-string">"up"</span>) + intpixels=$((-1 * intmousespeed)) + xdotool mousemove_relative -- 0 <span class="hljs-variable">$intpixels</span> <span class="hljs-comment">#move mouse up</span> + intmousespeed=$((intmousespeed + intmouseacc)) <span class="hljs-comment">#speed up</span> + ;; + <span class="hljs-string">"down"</span>) + intpixels=$(( 1 * intmousespeed)) + xdotool mousemove_relative -- 0 <span class="hljs-variable">$intpixels</span> <span class="hljs-comment">#move mouse down</span> + intmousespeed=$((intmousespeed + intmouseacc)) <span class="hljs-comment">#speed up</span> + ;; + <span class="hljs-string">"left"</span>) + intpixels=$((-1 * intmousespeed)) + xdotool mousemove_relative -- <span class="hljs-variable">$intpixels</span> 0 <span class="hljs-comment">#move mouse left</span> + intmousespeed=$((intmousespeed + intmouseacc)) <span class="hljs-comment">#speed up</span> + ;; + <span class="hljs-string">"right"</span>) + intpixels=$(( 1 * intmousespeed)) + xdotool mousemove_relative -- <span class="hljs-variable">$intpixels</span> 0 <span class="hljs-comment">#move mouse right</span> + intmousespeed=$((intmousespeed + intmouseacc)) <span class="hljs-comment">#speed up</span> + ;; + <span class="hljs-string">"select"</span>) + xdotool click 1 <span class="hljs-comment">#left mouse button click</span> + ;; + <span class="hljs-string">"return"</span>) + xdotool key <span class="hljs-string">"Alt_L+Left"</span> <span class="hljs-comment">#WWW-Back</span> + ;; + <span class="hljs-string">"exit"</span>) + <span class="hljs-built_in">echo</span> Key Pressed: EXIT + ;; + <span class="hljs-string">"F2"</span>) + chromium-browser <span class="hljs-string">"https://www.youtube.com"</span> & + ;; + <span class="hljs-string">"F3"</span>) + chromium-browser <span class="hljs-string">"https://www.google.com"</span> & + ;; + <span class="hljs-string">"F4"</span>) + <span class="hljs-built_in">echo</span> Key Pressed: YELLOW C + ;; + <span c |