{"id":345,"date":"2017-12-27T00:33:58","date_gmt":"2017-12-26T23:33:58","guid":{"rendered":"http:\/\/wordpress.callac.online\/index.php\/arduino-et-javascript\/"},"modified":"2022-01-05T22:41:57","modified_gmt":"2022-01-05T21:41:57","slug":"arduino-et-javascript","status":"publish","type":"page","link":"https:\/\/wordpress.callac.online\/index.php\/numerique\/arduino\/arduino-et-javascript\/","title":{"rendered":"Arduino et Javascript"},"content":{"rendered":"

Un d\u00e9p\u00f4t pour en savoir plus<\/h2>\n

La suite de cette article n’est qu’une page du wiki<\/a> d’un d\u00e9p\u00f4t github<\/a> contenant des projets et des explications pour d\u00e9buter facilement avec ses outils.<\/p>\n

Arduino et Javascript<\/h2>\n

Le langage d’Arduino est le C. Avec ce langage, on peut tout faire avec Arduino si on ma\u00eetrise la b\u00eate …
\nEn g\u00e9n\u00e9ral, on va donc cr\u00e9er un programme que l’on va t\u00e9l\u00e9verser dans le microcontr\u00f4leur qui pourra ensuite ex\u00e9cuter le programme sans avoir besoin d’un ordinateur.<\/p>\n

Par un c\u00e2ble USB, en utilisant la liaison s\u00e9rie, on peut aussi communiquer entre un terminal de l’ordinateur et Arduino.<\/p>\n

Si l’id\u00e9e est de travailler dans cette derni\u00e8re configuration, pourquoi ne pas utiliser un langage de plus haut niveau pour contr\u00f4ler la plaque ? Et pour b\u00e9n\u00e9ficier d’une bonne interface graphique, pourquoi ne pas utiliser le navigateur de son ordinateur ? Le choix du langage ne peut donc \u00eatre que Javascript !<\/p>\n

NodeJS, Johnny-Five, c’est quoi ?<\/h2>\n

NodeJS<\/a> est un outil \u00e9crit en Javascript, disponible sur toutes les plateformes. On pourra \u00e0 partir de l’outil node<\/strong> lancer en console n’importe quel programme Javascript, et surtout cr\u00e9er localement un serveur, ce qui sera tr\u00e8s utile pour se servir du navigateur.<\/p>\n

NodeJS fonctionne par module que l’on g\u00e8re via l’outil npm<\/strong>. <\/p>\n

Pour un projet communiquant entre Arduino et le navigateur, on se servira principalement des modules socket.io<\/strong>, express<\/strong> et johnny-five<\/strong>.<\/p>\n

Johnny-Five<\/a> est donc un module de l’outil NodeJS. Son site officiel donne bon nombre d’exemples qui mettent en valeur la facilit\u00e9 d’utiliser Arduino en Javascript.<\/p>\n

Des limitations<\/h2>\n

L’id\u00e9e ici est d’utiliser Arduino connect\u00e9 \u00e0 l’ordinateur via un c\u00e2ble USB<\/strong>. C’est une contrainte forte pour bon nombre de projets.<\/p>\n

NodeJS \u00e9tant bas\u00e9e sur une gestion des \u00e9v\u00e9nements non bloquante, ceci et le plus souvent un avantage mais est parfois d\u00e9routant car on a perdu l’aspect s\u00e9quentiel des \u00e9v\u00e9nements. Il faut donc en tenir compte par moment.<\/p>\n

Enfin, m\u00eame si Johnny-Five g\u00e8re la plupart des composants courants, il faut tout de m\u00eame jeter un \u0153il sur le site officiel ou faire une recherche pour savoir comment proc\u00e9der<\/p>\n","protected":false},"excerpt":{"rendered":"

Un d\u00e9p\u00f4t pour en savoir plus La suite de cette article n’est qu’une page du wiki d’un d\u00e9p\u00f4t github contenant des projets et des explications pour d\u00e9buter facilement avec ses…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":978,"menu_order":8,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-345","page","type-page","status-publish","hentry"],"yoast_head":"\nArduino et Javascript - Maths & Num\u00e9rique<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wordpress.callac.online\/index.php\/numerique\/arduino\/arduino-et-javascript\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Arduino et Javascript - Maths & Num\u00e9rique\" \/>\n<meta property=\"og:description\" content=\"Un d\u00e9p\u00f4t pour en savoir plus La suite de cette article n’est qu’une page du wiki d’un d\u00e9p\u00f4t github contenant des projets et des explications pour d\u00e9buter facilement avec ses…\" \/>\n<meta property=\"og:url\" content=\"https:\/\/wordpress.callac.online\/index.php\/numerique\/arduino\/arduino-et-javascript\/\" \/>\n<meta property=\"og:site_name\" content=\"Maths & Num\u00e9rique\" \/>\n<meta property=\"article:modified_time\" content=\"2022-01-05T21:41:57+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/wordpress.callac.online\/index.php\/numerique\/arduino\/arduino-et-javascript\/\",\"url\":\"https:\/\/wordpress.callac.online\/index.php\/numerique\/arduino\/arduino-et-javascript\/\",\"name\":\"Arduino et Javascript - 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