{"id":9650,"date":"2024-05-06T16:07:55","date_gmt":"2024-05-06T14:07:55","guid":{"rendered":"https:\/\/inamata.io\/docs\/entrees-analogiques\/"},"modified":"2024-05-06T16:07:55","modified_gmt":"2024-05-06T14:07:55","password":"","slug":"entrees-analogiques","status":"publish","type":"docs","link":"https:\/\/inamata.io\/fr\/docs\/entrees-analogiques\/","title":{"rendered":"Entr\u00e9es analogiques"},"content":{"rendered":"

Les entr\u00e9es analogiques sont des p\u00e9riph\u00e9riques puissants mais simples qui permettent de d\u00e9tecter l’\u00e9tat d’autres appareils. Les contr\u00f4leurs ESP32 lisent une plage de tension de 0V \u00e0 3,3V en utilisant les convertisseurs analogiques-num\u00e9riques (ADC) internes. Ce p\u00e9riph\u00e9rique peut \u00eatre connect\u00e9 \u00e0 des capteurs de lumi\u00e8re, de temp\u00e9rature ou de pression qui \u00e9mettent une tension correspondant \u00e0 un \u00e9tat de l’environnement. Cette tension peut ensuite \u00eatre mise en correspondance de mani\u00e8re lin\u00e9aire avec l’unit\u00e9 de mesure du capteur. Vous pouvez \u00e9galement renvoyer directement la tension mesur\u00e9e.<\/p>\n

Utilisez les t\u00e2ches de lecture de la valeur et d’interrogation du contr\u00f4leur d’entr\u00e9e pour lire la valeur des p\u00e9riph\u00e9riques une fois ou p\u00e9riodiquement. Ces t\u00e2ches sont \u00e9galement utilis\u00e9es dans les plans de contr\u00f4le et peuvent \u00eatre combin\u00e9es avec des n\u0153uds \u00ab\u00a0si\u00a0\u00bb pour prendre une mesure en fonction de la valeur mesur\u00e9e.<\/p>\n

\"Une<\/a><\/p>\n

Statut : Soutien total<\/em><\/p>\n

Configuration des entr\u00e9es analogiques<\/h2>\n

Outre le nom du p\u00e9riph\u00e9rique, les principaux aspects \u00e0 configurer dans les entr\u00e9es analogiques sont le type de broche et de point de donn\u00e9es \u00e0 utiliser ainsi que le mappage de la valeur lue. Donnez au p\u00e9riph\u00e9rique le nom de l’appareil auquel il est connect\u00e9, tel qu’un capteur de temp\u00e9rature ou une sonde lumineuse.<\/p>\n

Les broches utilisables sur l’ESP32 sont limit\u00e9es \u00e0 32 \u00e0 39, bien que l’ESP32 dispose d’un second ADC connect\u00e9 aux broches 0 \u00e0 27. La raison pour laquelle les broches inf\u00e9rieures ne peuvent pas \u00eatre utilis\u00e9es est que l’ADC2 est d\u00e9sactiv\u00e9 lorsque le Wi-Fi est activ\u00e9. Les broches sup\u00e9rieures sont connect\u00e9es \u00e0 ADC1 qui n’est pas affect\u00e9 par l’activation du Wi-Fi. En interne, les broches sont multiplex\u00e9es vers leur ADC respectif, mais cela n’affecte pas de mani\u00e8re significative l’activation simultan\u00e9e de plusieurs p\u00e9riph\u00e9riques d’entr\u00e9e analogique. Pour plus de d\u00e9tails, reportez-vous \u00e0 la r\u00e9f\u00e9rence des broches de l’ESP32.<\/a> <\/p>\n

Le type de point de donn\u00e9es est n\u00e9cessaire pour donner un contexte aux valeurs mesur\u00e9es. Le nom et l’unit\u00e9 du type de point de donn\u00e9es sont associ\u00e9s au point de donn\u00e9es et sont utiles lors de la cr\u00e9ation de tableaux de bord. Les limites du type de point de donn\u00e9es ne sont pas utilis\u00e9es dans ce contexte.<\/p>\n

La valeur lue peut \u00eatre renvoy\u00e9e sous forme de tension ou mise en correspondance avec une unit\u00e9 mesur\u00e9e par le capteur. Utilisez le bouton radio pour basculer entre ces deux comportements. En mode de conversion \u00e0 l’unit\u00e9, d\u00e9finissez la plage de tension minimale et maximale. D\u00e9finissez ensuite les valeurs de sortie auxquelles correspondent ces tensions. Si la sortie \u00e0 pince est activ\u00e9e, toute tension sup\u00e9rieure ou inf\u00e9rieure aux limites est affect\u00e9e \u00e0 la limite de l’unit\u00e9 correspondante. Il est \u00e9galement possible d’inverser la cartographie, c’est-\u00e0-dire que 0V \u00e9quivaut \u00e0 120\u00b0C et 3,3V \u00e0 -20\u00b0C. Pour ce faire, r\u00e9glez la valeur unitaire minimale sur la valeur la plus \u00e9lev\u00e9e et la valeur unitaire maximale sur la valeur la plus faible.<\/p>\n

Documents connexes<\/h2>\n

Pour savoir comment ajouter un p\u00e9riph\u00e9rique, suivez le guide Allumer votre premi\u00e8re LED avec une ESP32<\/a>. Cela suppose que vous ayez d\u00e9j\u00e0 ajout\u00e9 un contr\u00f4leur(Windows<\/a> \/ Linux<\/a>) comme indiqu\u00e9 dans notre guide YouTube<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Les entr\u00e9es analogiques sont des p\u00e9riph\u00e9riques puissants mais simples qui permettent de d\u00e9tecter l’\u00e9tat d’autres appareils. Les contr\u00f4leurs ESP32 lisent…<\/p>\n","protected":false},"author":2,"featured_media":9643,"comment_status":"open","ping_status":"closed","template":"single-fullwidth.php","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"doc_category":[159,160],"doc_tag":[],"class_list":{"0":"post-9650","1":"docs","2":"type-docs","3":"status-publish","4":"has-post-thumbnail","6":"doc_category-documentation-du-systeme","7":"doc_category-peripheriques"},"year_month":"2026-04","word_count":561,"total_views":"325","reactions":{"happy":"1","normal":"0","sad":"0"},"author_info":{"name":"Moritz Ulmer","author_nicename":"moritz","author_url":"https:\/\/inamata.io\/fr\/author\/moritz\/"},"doc_category_info":[{"term_name":"Documentation du syst\u00e8me","term_url":"https:\/\/inamata.io\/fr\/docs-category\/documentation-du-systeme\/"},{"term_name":"P\u00e9riph\u00e9riques","term_url":"https:\/\/inamata.io\/fr\/docs-category\/peripheriques\/"}],"doc_tag_info":[],"yoast_head":"\nEntr\u00e9es analogiques - Inamata<\/title>\n<meta name=\"description\" content=\"Apprenez \u00e0 configurer les entr\u00e9es analogiques en ligne sur votre ESP32. 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