My Raspberry Pi is hooked up to my AV Receiver using the HDMI port. My AV Receiver sits behind a cabinet door, so it cannot be controlled directly using the remote unless I open the door. This is not an issue when watching TV, as TV and AVR communicate using the HDMI-CEC protocol, allowing me to control the AVR (or even the connected PlayStation 3) with the TV’s remote.<\/p>\n
I also wanted to have this convenience when listening to music from the Raspberry Pi, i.e. at least turning the AVR on and off from the webinterface of Pi Musicbox<\/a>. Luckily, there’s a library called libcec<\/a> that lets you do this. Unfortunately, I could not get it compiled on Pi Musicbox, so I had to start off from a clean installation of Raspbian Jessie. These are the steps I followed:<\/p>\n So far so good, but how to call cec-client from the web interface? This would be easily done with PHP, but it took me a little longer to figure out. Here are the steps I undertook (once again not a full recipe):<\/p>\n You probably want to run multiple commands when turning on the receiver – also switching it to the Raspberry port, and maybe turning the tv off (on my system, it is turned on automatically by the AVR when I switch to the Raspberry port. This can be done via You might have to do a\u00a0 python -m compileall .<\/em> after changes to the Python script. service mopidy restart<\/em> will then apply changes. Good luck!<\/p>\n","protected":false},"excerpt":{"rendered":" My Raspberry Pi is hooked up to my AV Receiver using the HDMI port. My AV Receiver sits behind a cabinet door, so it cannot be controlled directly using the remote unless I open the door. This is not an issue when watching TV, as TV and AVR communicate using the HDMI-CEC protocol, allowing me […]<\/p>\n","protected":false},"author":1,"featured_media":1885,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[78],"tags":[87],"class_list":["post-1884","post","type-post","status-publish","format-standard","has-post-thumbnail","category-tech","tag-raspberry-pi","czr-hentry"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.wittwer.nl\/wp-content\/uploads\/2016\/02\/Raspi-PGB001.png","jetpack_shortlink":"https:\/\/wp.me\/plKIk-uo","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=\/wp\/v2\/posts\/1884","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1884"}],"version-history":[{"count":7,"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=\/wp\/v2\/posts\/1884\/revisions"}],"predecessor-version":[{"id":1892,"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=\/wp\/v2\/posts\/1884\/revisions\/1892"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=\/wp\/v2\/media\/1885"}],"wp:attachment":[{"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1884"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1884"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wittwer.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1884"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\n
\n
\n
\nsubprocess.call('echo \"on 5\" | \/usr\/local\/bin\/cec-client',shell=True)
\ntime.sleep(5)
\nsubprocess.call('echo \"as\" | \/usr\/local\/bin\/cec-client',shell=True)
\ntime.sleep(5)
\nsubprocess.call('echo \"standby 0\" | \/usr\/local\/bin\/cec-client',shell=True)
\n<\/code><\/p>\n