{"id":265,"date":"2013-12-26T09:26:21","date_gmt":"2013-12-26T08:26:21","guid":{"rendered":"http:\/\/wordpress.callac.online\/index.php\/mesure-de-temperature-avec-le-capteur-lm35\/"},"modified":"2022-01-05T22:41:57","modified_gmt":"2022-01-05T21:41:57","slug":"mesure-de-temperature-avec-le-capteur-lm35","status":"publish","type":"page","link":"https:\/\/wordpress.callac.online\/index.php\/numerique\/arduino\/la-bibliotheque-serialdlf\/mesure-de-temperature-avec-le-capteur-lm35\/","title":{"rendered":"Mesure de temp\u00e9rature avec le capteur LM35"},"content":{"rendered":"<h2>Descriptif du programme<\/h2>\n<p>Ce programme tr\u00e8s simple ne fait que mesurer la temp\u00e9rature sur demande de l&rsquo;utilisateur en utilisant le capteur LM35.<\/p>\n<p>L&rsquo;int\u00e9r\u00eat de ce programme est de mettre en oeuvre sur un exemple minimal le sch\u00e9ma g\u00e9n\u00e9ral de l&rsquo;utilisation de la liaison s\u00e9rie.<\/p>\n<h2>Le capteur de temp\u00e9rature LM35<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" aligncenter size-full wp-image-881\" src=\"http:\/\/wordpress.callac.online\/wp-content\/uploads\/2013\/12\/gif_lm35.gif\" alt=\"lm35.gif\" width=\"500\" height=\"472\" align=\"center\" \/><\/p>\n<p>Ce capteur est tr\u00e8s facile \u00e0 utiliser puisqu&rsquo;il suffit de l&rsquo;alimenter avec les pattes VCC et GND et la patte centrale \u00e0 une entr\u00e9e analogique d&rsquo;Arduino.<\/p>\n<p>La conversion elle aussi est simple puisqu&rsquo;un volt correspond \u00e0 100 degr\u00e9s Celsius.<\/p>\n<p>La lecture analogique d&rsquo;u signal de 0 \u00e0 5V \u00e9tant cod\u00e9e de 0 \u00e0 1023, on a la formule<\/p>\n<p>Temp = Volt * 5.\/1023*100 ;<\/p>\n<h2>Le code<\/h2>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">\/* \n Sur demande de l\"utilisateur via la liaison serie (caractere m),\n le programme mesure la temperature en degre Celsius.\n *\/\n\n\/\/------------------------------------------------------------\n\/\/ Librairies\n\/\/------------------------------------------------------------\n\n\/\/ pour le traitement du message recu sur la liaison serie\n#include &lt;SerialDLF.h&gt;\n\n\/\/------------------------------------------------------------\n\/\/ Constantes\n\/\/------------------------------------------------------------\n\n\/\/ Classe de SerialDLF\nSerialString messageRecu;\n\nconst int LM35=A0; \/\/ pin analogique du capteur de temperature LM35\n\n\n\/\/------------------------------------------------------------\n\/\/ Setup\n\/\/------------------------------------------------------------\n\nvoid setup()\n{\n  \/\/ Initialisation de la liaison serie\n  Serial.begin(9600); \n  Serial.flush();\n  Serial.println(\"Liaison serie operationnelle !\");\n  Serial.println(\"------------------------------\");\n  delay(1000);\n  Serial.println(\"Descriptif du programme :\");\n  Serial.println(\"--------------------------\");\n  Serial.println(\"Ce programme mesure la temperature a la demande.\");\n  Serial.println(\"--------------------------\");\n  Serial.println(\"Pour connaitre les commandes, taper sur h ou H.\");\n  Serial.println(\"--------------------------\");\n\n\n  \/\/ Autres initilisations\n\n\n} \/\/ fin setup\n\n\/\/------------------------------------------------------------\n\/\/ Loop\n\/\/------------------------------------------------------------\n\nvoid loop()\n{ \n  messageRecu.renew();  \/\/ on lit un eventuel message.\n  if (messageRecu.empty()==false) \/\/ Si le message est non vide ...\n  {\n    \/\/Serial.println(messageRecu.get());\n    traitement();\n    Serial.flush();\n  }\n} \/\/fin loop\n\n\n\/\/------------------------------------------------------------\n\/\/ Fonction traitement()\n\/\/------------------------------------------------------------\n\/*\nExecute le traitement des caracteres recus par la liaison serie\n qui sont stockes dans messageRecu.\n *\/\n\nvoid traitement()\n{\n  float temp;\n\n  if ((messageRecu.equals(\"Descriptif\")) || (messageRecu.equals(\"d\")))\n  {\n\n    Serial.println(\"--------------------------\");\n    Serial.println(\"Descriptif du programme :\");\n    Serial.println(\"--------------------------\");\n    Serial.println(\"Ce programme mesure la temperature a la demande.\");\n    Serial.println(\"--------------------------\");\n  }\n  else if  ((messageRecu.equals(\"Help\")) || (messageRecu.equals(\"h\")))\n  {\n    Serial.println(\"--------------------------\");\n    Serial.println(\"Liste des commandes :\");\n    Serial.println(\"--------------------------\");\n    Serial.println(\"--&gt; Descriptif ou d : affiche le descriptif du programme.\");\n    Serial.println(\"--&gt; Help ou h : affiche la liste des commandes.\");\n    Serial.println(\"--&gt; Mesure ou m : demande une mesure.\");\n    Serial.println(\"--------------------------\");\n  }\n  else if  ((messageRecu.equals(\"Mesure\")) || (messageRecu.equals(\"m\")))\n  {\n    temp=analogRead(LM35)*5.\/1023*100;  \/\/ lecture et conversion en degres Celsius.\n    Serial.print(\"Temperature en degres Celsius : \");\n    Serial.println(temp);\n  }\n\n  else\n  {\n    Serial.println(\"Erreur de saisie !\");\n  }\n\n} \/\/ fin traitement\n\n\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Descriptif du programme Ce programme tr\u00e8s simple ne fait que mesurer la temp\u00e9rature sur demande de l&rsquo;utilisateur en utilisant le capteur LM35. L&rsquo;int\u00e9r\u00eat de ce programme est de mettre en&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2544,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-265","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mesure de temp\u00e9rature avec le capteur LM35 - Maths &amp; 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\/la-bibliotheque-serialdlf\/mesure-de-temperature-avec-le-capteur-lm35\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mesure de temp\u00e9rature avec le capteur LM35 - Maths &amp; Num\u00e9rique\" \/>\n<meta property=\"og:description\" content=\"Descriptif du programme Ce programme tr\u00e8s simple ne fait que mesurer la temp\u00e9rature sur demande de l&rsquo;utilisateur en utilisant le capteur LM35. 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