{"id":1332,"date":"2015-02-11T17:32:23","date_gmt":"2015-02-11T16:32:23","guid":{"rendered":"https:\/\/www.fanjoe.be\/?p=1332"},"modified":"2015-02-12T00:58:24","modified_gmt":"2015-02-11T23:58:24","slug":"rasperry-pi-sonde-ds18b20-problemes-avec-la-mise-a-jour-de-janvier-2015","status":"publish","type":"post","link":"https:\/\/www.fanjoe.be\/?p=1332","title":{"rendered":"Rasperry PI & Sonde DS18B20 : Probl\u00e8mes avec la mise \u00e0 jour de janvier 2015"},"content":{"rendered":"

\"DS18B20-01\"<\/a><\/p>\n

Comme vous l’avez peut-\u00eatre d\u00e9j\u00e0 lu sur mon blog<\/a>, j’utilise une sonde DS18B20 connect\u00e9e \u00e0 mon Raspberry Pi pour conna\u00eetre la temp\u00e9rature ambiante.<\/p>\n

Il y a quelques jours, lors d’une mise \u00e0 jour (janvier 2015) sudo apt-get upgrade<\/code>, je me suis aper\u00e7u que ma sonde ne renvoyait plus aucune donn\u00e9e.<\/p>\n

Concr\u00e8tement, le dossier \/sys\/bus\/w1\/devices\/ \u00e9tait vide au lieu de contenir un dossier portant le num\u00e9ro de ma sonde (28-00000583d4a2<\/code>) renfermant toutes les informations y aff\u00e9rant.<\/p>\n

Apr\u00e8s quelques recherches, j’ai trouv\u00e9 ces fils de discussion qui m’ont apport\u00e9 la solution :
\nhttp:\/\/www.raspberrypi.org\/forums\/viewtopic.php?t=98407&p=689094
\n<\/a>http:\/\/www.raspberrypi.org\/forums\/viewtopic.php?p=675658#p675658<\/a><\/p>\n

On y apprend que depuis la sortie du RPi 2 Model B<\/a>, le kernel a \u00e9t\u00e9 mis \u00e0 jours vers la version 3.18 qui apportes quelques changements dans l’organisation de l’arborescence des p\u00e9riph\u00e9riques.<\/p>\n

Pour r\u00e9soudre ces probl\u00e8mes, il suffit d’ajouter une ligne dans le fichier \/boot\/config.txt<\/code>.<\/p>\n

$ sudo nano \/boot\/config.txt<\/pre>\n
Et on ajoute cette ligne \u00e0 la fin du fichier :<\/p>\n
dtoverlay=w1-gpio<\/pre>\n
Ceci fonctionne si le fil data (jaune, bleu ou blanc selon le mod\u00e8le) est connect\u00e9 sur le GPIO 4, le port par d\u00e9faut.<\/p>\n
\"DS18B20-02\"<\/a><\/p>\n
Si non, le forum indique :<\/p>\n
If you require the external pullup pin, use:<\/em><\/p>\n
dtoverlay=w1-gpio-pullup,gpiopin=<x>,extpullup=<y><\/pre>\n
Otherwise use:<\/em><\/p>\n
dtoverlay=w1-gpio,gpiopin=<x><\/pre>\n
(where <x> and <y> are GPIO pins, obviously).<\/em><\/p>\n
If you are using the parasitic power (power over data, 2-wire) mode, add \u00ab\u00a0,pullup=1\u00a0\u00bb (or \u00ab\u00a0,pullup=on\u00a0\u00bb)<\/em><\/p>\n
On entend par \u00ab\u00a0GPIO pins\u00a0\u00bb, le num\u00e9ro du port GPIO et non le num\u00e9ro de la pin.<\/p>\n
Dans mon cas :<\/p>\n
dtoverlay=w1-gpio,gpiopin=4<\/span><\/pre>\n
On est sur la pin \u00ab\u00a07\u00a0\u00bb du RPi, mais sur le GPIO \u00ab\u00a04\u00a0\u00bb. On doit indiquer gpiopin=4<\/code>.<\/p>\n","protected":false},"excerpt":{"rendered":"
<\/a><\/p>\n
Comme vous l’avez peut-\u00eatre d\u00e9j\u00e0 lu sur mon blog<\/a>, j’utilise une sonde DS18B20 connect\u00e9e…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[179,3,12],"tags":[122,22,18,123],"class_list":["post-1332","post","type-post","status-publish","format-standard","hentry","category-domotique","category-informatique","category-raspberrypi","tag-panne","tag-raspberry-pi","tag-sonde-ds18b20","tag-update","end"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.fanjoe.be\/index.php?rest_route=\/wp\/v2\/posts\/1332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fanjoe.be\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fanjoe.be\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fanjoe.be\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fanjoe.be\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1332"}],"version-history":[{"count":0,"href":"https:\/\/www.fanjoe.be\/index.php?rest_route=\/wp\/v2\/posts\/1332\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fanjoe.be\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fanjoe.be\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fanjoe.be\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}