{"id":508,"date":"2015-03-04T19:51:11","date_gmt":"2015-03-04T18:51:11","guid":{"rendered":"http:\/\/www.walterschlag.net\/?p=508"},"modified":"2015-04-05T13:34:52","modified_gmt":"2015-04-05T12:34:52","slug":"raspberry-pi-cpu-temperatur-senken","status":"publish","type":"post","link":"https:\/\/inator.at\/?p=508","title":{"rendered":"Raspberry PI CPU Temperatur senken"},"content":{"rendered":"<p>in der \/boot\/config.txt folgendes anpassen :<\/p>\n<p>f\u00fcr Raspberry PI 2<br \/>\n<em><br \/>\narm_freq=900<br \/>\n<\/em><br \/>\nf\u00fcr Raspberry PI A\/B\/B+<br \/>\n<em><br \/>\narm_freq=700<br \/>\n<\/em><br \/>\nund dann :<br \/>\n<em><br \/>\narm_freq_min=200<br \/>\nstart_x=0<br \/>\ngpu_mem=16<br \/>\ncore_freq=250<br \/>\ncore_freq_min=75<br \/>\nsdram_freq=450<br \/>\nover_voltage=0<br \/>\n<\/em><\/p>\n<p>Achtung : mit der neuesten Firmware geht das NICHT mehr !<br \/>\nMuss ich aber erst noch genauer untersuchen, warum.<\/p>\n<p>Ausserdem kann man noch den HDMI Ausgang abschalten. (Falls man den nicht ben\u00f6tigt)<br \/>\nBeim Starten wird ein Script gestartet, welches nach 30 Minuten den Ausgang abschaltet.<br \/>\nSo hat man im Notfall (z.B. Firewall blockiert alles) noch genug Zeit, den PI zu reparieren.<br \/>\n\/root\/scripts\/hdmi.sh<\/p>\n<p><em><br \/>\n#\/bin\/sh<br \/>\nsleep 1800<br \/>\n\/opt\/vc\/bin\/tvservice -off<br \/>\n<\/em><\/p>\n<p>Und in die \/etc\/rc.local vor dem &#8222;exit 0&#8220; noch das einf\u00fcgen :<br \/>\n<em><br \/>\n\/root\/scripts\/hdmi.sh &#038;<br \/>\n<\/em><\/p>\n<p>Um die CPU-Temperatur leicher pr\u00fcfen zu k\u00f6nnen, empfielt es sich, ein kleines script anzulegen;<br \/>\nz.B. \/bin\/temperatur<br \/>\n<em><br \/>\n#!\/bin\/bash<br \/>\nx=$(cat \/sys\/class\/thermal\/thermal_zone0\/temp)<br \/>\nt1=$(echo &#8222;$x\/1000&#8220; | bc -l | cut -b1-7)<br \/>\necho $t1<br \/>\n<\/em><br \/>\nDamit das funktioniert, ben\u00f6tigt man noch &#8222;bc&#8220; :<br \/>\n<em><br \/>\napt-get update<br \/>\napt-get install bc<br \/>\n<\/em><\/p>\n<p>&#8230;und was bringt das ?<br \/>\nBittesehr :<br \/>\n<a href=\"https:\/\/inator.at\/wp-content\/uploads\/2015\/03\/RaspberryPI_CPU_Temperatur.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/inator.at\/wp-content\/uploads\/2015\/03\/RaspberryPI_CPU_Temperatur-300x70.png\" alt=\"RaspberryPI_CPU_Temperatur\" width=\"300\" height=\"70\" class=\"alignnone size-medium wp-image-517\" srcset=\"https:\/\/inator.at\/wp-content\/uploads\/2015\/03\/RaspberryPI_CPU_Temperatur-300x70.png 300w, https:\/\/inator.at\/wp-content\/uploads\/2015\/03\/RaspberryPI_CPU_Temperatur-1024x240.png 1024w, https:\/\/inator.at\/wp-content\/uploads\/2015\/03\/RaspberryPI_CPU_Temperatur.png 1526w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>in der \/boot\/config.txt folgendes anpassen : f\u00fcr Raspberry PI 2 arm_freq=900 f\u00fcr Raspberry PI A\/B\/B+ arm_freq=700 und dann : arm_freq_min=200 start_x=0 gpu_mem=16 core_freq=250 core_freq_min=75 sdram_freq=450 over_voltage=0 Achtung : mit der neuesten Firmware geht das NICHT mehr ! Muss ich aber erst noch genauer untersuchen, warum. Ausserdem kann man noch den HDMI Ausgang abschalten. (Falls man &hellip; <a href=\"https:\/\/inator.at\/?p=508\" class=\"more-link\"><span class=\"screen-reader-text\">Raspberry PI CPU Temperatur senken<\/span> weiterlesen<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,17,9],"tags":[],"class_list":["post-508","post","type-post","status-publish","format-standard","hentry","category-linux","category-raspberry-pi","category-server-etc"],"_links":{"self":[{"href":"https:\/\/inator.at\/index.php?rest_route=\/wp\/v2\/posts\/508","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inator.at\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inator.at\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inator.at\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/inator.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=508"}],"version-history":[{"count":14,"href":"https:\/\/inator.at\/index.php?rest_route=\/wp\/v2\/posts\/508\/revisions"}],"predecessor-version":[{"id":562,"href":"https:\/\/inator.at\/index.php?rest_route=\/wp\/v2\/posts\/508\/revisions\/562"}],"wp:attachment":[{"href":"https:\/\/inator.at\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inator.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inator.at\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}