{"id":6285,"date":"2020-04-15T10:00:26","date_gmt":"2020-04-15T08:00:26","guid":{"rendered":"http:\/\/www.moreware.org\/wp\/?p=6285"},"modified":"2020-04-15T11:29:59","modified_gmt":"2020-04-15T09:29:59","slug":"arduino-come-funziona-il-modulo-rtc-real-time-clock","status":"publish","type":"post","link":"https:\/\/www.moreware.org\/wp\/blog\/2020\/04\/15\/arduino-come-funziona-il-modulo-rtc-real-time-clock\/","title":{"rendered":"Arduino: come funziona il modulo RTC (Real Time Clock)"},"content":{"rendered":"<p style=\"text-align: justify\">In questa lezione si imparer\u00e0 ad utilizzare il modulo <a title=\"\" class=\"aalmanual\" target=\"_blank\"   href=\"https:\/\/amzn.to\/2JCZtVg\">RTC<\/a> DS3231.<\/p>\n<p style=\"text-align: justify\">Questo modulo permette di visualizzare l&#8217;anno, il mese, il giorno, l&#8217;ora, il minuto, il secondo e il giorno della settimana corrente. Il modulo in questione \u00e8 alimentato da una piccola batteria. Questa batteria continuer\u00e0 ad alimentare il modulo anche in assenza del collegamento con la board di <a title=\"Arduino\" class=\"aalmanual\" target=\"_blank\"   href=\"https:\/\/www.amazon.it\/gp\/search?ie=UTF8&#38;tag=morewareblog-21&#38;linkCode=ur2&#38;linkId=40df2ca3e29e0dde966f711be6faeac5&#38;camp=3414&#38;creative=21718&#38;index=aps&#38;keywords=arduino\">Arduino<\/a>.<\/p>\n<p style=\"text-align: justify\">Il modulo <a title=\"\" class=\"aalmanual\" target=\"_blank\"   href=\"https:\/\/amzn.to\/2JCZtVg\">RTC<\/a> riesce a conteggiare il tempo (anche grazie all&#8217;ausilio di un oscillatore). Adotta una comunicazione seriale (I2C) con <a title=\"Arduino\" class=\"aalmanual\" target=\"_blank\"   href=\"https:\/\/www.amazon.it\/gp\/search?ie=UTF8&#38;tag=morewareblog-21&#38;linkCode=ur2&#38;linkId=40df2ca3e29e0dde966f711be6faeac5&#38;camp=3414&#38;creative=21718&#38;index=aps&#38;keywords=arduino\">Arduino<\/a> ed il modulo pu\u00f2 leggere o scrivere dati.<\/p>\n<p style=\"text-align: justify\"><strong>I sistemi <a title=\"\" class=\"aalmanual\" target=\"_blank\"   href=\"https:\/\/amzn.to\/2JCZtVg\">RTC<\/a> presentano diversi vantaggi tra cui:<\/strong><\/p>\n<ul style=\"text-align: left\">\n<li>bassi consumi energetici<\/li>\n<li>Il calcolo del tempo viene effettuato all&#8217;interno di questi moduli<\/li>\n<li>Alta precisione<\/li>\n<\/ul>\n<p style=\"text-align: justify\">Come detto precedentemente \u00e8 presente un oscillatore che vibra a una frequenza di 32.768 kHz. Tale dispositivo utilizza la meccanica di risonanza di una vibrazione cristallo di materiale piezoelettrico per generare un segnale elettrico con una ben precisa frequenza. Questa frequenza \u00e8 comunemente utilizzato per tenere traccia del tempo (come in orologi da polso quarzo ), per fornire uno stabile segnale di clock per digitali circuiti integrati , e stabilizzare frequenze per trasmettitori radio e ricevitori.<\/p>\n<p style=\"text-align: justify\">In questo articolo si vedr\u00e0 come utilizzare il modulo RTC DS3231.<\/p>\n<p style=\"text-align: justify\"><strong>I materiali da utilizzare sono i seguenti:<\/strong><\/p>\n<ul style=\"text-align: left\">\n<li>(1) x <a title=\"Arduino\" class=\"aalmanual\" target=\"_blank\"   href=\"https:\/\/www.amazon.it\/gp\/search?ie=UTF8&#38;tag=morewareblog-21&#38;linkCode=ur2&#38;linkId=40df2ca3e29e0dde966f711be6faeac5&#38;camp=3414&#38;creative=21718&#38;index=aps&#38;keywords=arduino\">Arduino<\/a> UNO<\/li>\n<li><span style=\"font-size: 13.6px\">(1) x Modulo <a href=\"https:\/\/amzn.to\/2RvZYl2\">RTC DS3231<\/a><\/span><\/li>\n<li>(4) x Connettori F-M (Connettori di <a title=\"\" class=\"aalmanual\" target=\"_blank\"   href=\"https:\/\/www.amazon.it\/gp\/search?ie=UTF8&#38;tag=morewareblog-21&#38;linkCode=ur2&#38;linkId=9ee22a1a50df5cff279d3b0a474d007c&#38;camp=3414&#38;creative=21718&#38;index=aps&#38;keywords=dupont\">DuPont<\/a> Femmina \u2013 Maschio )<\/li>\n<\/ul>\n<p style=\"text-align: justify\"><strong>Il diagramma di collegamento \u00e8 il seguente:<\/strong><\/p>\n<p style=\"text-align: justify\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-6287 size-full\" src=\"https:\/\/i0.wp.com\/www.moreware.org\/wp\/wp-content\/uploads\/2020\/04\/ds1307_simple_wWCdd4V1Kw.jpg?resize=635%2C510&#038;ssl=1\" alt=\"RTC \" width=\"635\" height=\"510\" srcset=\"https:\/\/i0.wp.com\/www.moreware.org\/wp\/wp-content\/uploads\/2020\/04\/ds1307_simple_wWCdd4V1Kw.jpg?w=635&amp;ssl=1 635w, https:\/\/i0.wp.com\/www.moreware.org\/wp\/wp-content\/uploads\/2020\/04\/ds1307_simple_wWCdd4V1Kw.jpg?resize=300%2C241&amp;ssl=1 300w\" sizes=\"auto, (max-width: 635px) 100vw, 635px\" \/><\/p>\n<p style=\"text-align: justify\"><strong>Il codice \u00e8 il seguente;<\/strong><\/p>\n<pre class=\"lang:default decode:true \">#include &lt;Wire.h&gt;\r\n#include &lt;DS3231.h&gt;\r\n\r\nDS3231 clock;\r\nRTCDateTime dt;\r\n\r\nvoid setup()\r\n{\r\n  Serial.begin(9600);\r\n\r\n  Serial.println(\"Initialize DS3231\");\r\n  clock.begin();\r\n  \r\n   Manual (YYYY, MM, DD, HH, II, SS)\/\/\u00e8 una funzione presenta nella libreria che permette di impostare in che modo sar\u00e0 visualizzata la data\r\n   clock.setDateTime(2020, 4, 8, 14, 46, 00); \/\/imposti l'orario corrente\r\n  \r\n  clock.setDateTime(__DATE__, __TIME__);    \/\/<em>DATE<\/em> e <em>TIME<\/em> sono  macro di Arduino che conservano data e ora di sistema sino allo spegnimento della board\r\n \r\n}\r\n\r\nvoid loop()\r\n{\r\n  dt = clock.getDateTime();\r\n\r\n  \/\/ For leading zero look to DS3231_dateformat example\r\n\r\n  Serial.print(\"Raw data: \");\r\n  Serial.print(dt.year);   Serial.print(\"-\");\r\n  Serial.print(dt.month);  Serial.print(\"-\");\r\n  Serial.print(dt.day);    Serial.print(\" \");\r\n  Serial.print(dt.hour);   Serial.print(\":\");\r\n  Serial.print(dt.minute); Serial.print(\":\");\r\n  Serial.print(dt.second); Serial.println(\"\");\r\n\r\n  delay(1000);\r\n}<\/pre>\n<p style=\"text-align: justify\">Per installare la libreria DS3231 visitare il seguente articolo: <a href=\"https:\/\/www.moreware.org\/wp\/blog\/2020\/03\/11\/arduino-ide-come-installare-una-libreria-10-1\/\">Arduino IDE: come installare una libreria #10.1<\/a>.<\/p>\n<p>Sul monitor seriale sar\u00e0 possibile visualizzare l&#8217;orario corrente.<\/p>\n<p style=\"text-align: justify\">Per acquistare il modulo <a href=\"https:\/\/amzn.to\/2RvZYl2\">clicca qui<\/a>.<\/p>\n<p style=\"text-align: justify\"><strong style=\"font-size: 0.85rem;text-align: justify\">Link utili<\/strong><\/p>\n<div style=\"text-align: left\">\n<ul style=\"text-align: left\">\n<li><a href=\"https:\/\/amzn.to\/311kqh7\">Arduino UNO R3<\/a><\/li>\n<li><a href=\"https:\/\/amzn.to\/2Rwbrl4\">Elegoo UNO R3<\/a><\/li>\n<li><a href=\"https:\/\/amzn.to\/2O2xCwT\">Arduino Starter Kit per principianti<\/a><\/li>\n<li><a href=\"https:\/\/amzn.to\/2U2CDJW\">Elegoo Advanced Starter Kit<\/a><\/li>\n<li><a href=\"https:\/\/amzn.to\/2RTjQOx\">Arduino Nano<\/a><\/li>\n<\/ul>\n<p style=\"text-align: justify\"><strong>Seguici per non perdere le prossime novit\u00e0!<\/strong><\/p>\n<ul style=\"text-align: left\">\n<li style=\"text-align: left\"><a href=\"https:\/\/www.paypal.com\/donate\/?token=H282tEKaA62wEZuVNQVg3G3x13CTiMULy5yVrvHoeObneB1PAzW5oVdU-yyDfQHPk7uAg0&amp;country.x=IT&amp;locale.x=IT\" rel=\"noopener noreferrer\">Donate<\/a><\/li>\n<li style=\"text-align: left\"><a href=\"https:\/\/www.youtube.com\/channel\/UCFFSDYPL0-Fx6OvJD28GP8A\" rel=\"noopener noreferrer\">Youtube<\/a><\/li>\n<li style=\"text-align: left\"><a href=\"https:\/\/www.moreware.org\/wp\/\" target=\"_blank\" rel=\"noopener noreferrer\">Blog<\/a><\/li>\n<li style=\"text-align: left\"><a href=\"https:\/\/www.facebook.com\/MoreWareOrg\" rel=\"noopener noreferrer\">Facebook<\/a><\/li>\n<li style=\"text-align: left\"><a href=\"https:\/\/twitter.com\/MoreWare20\" rel=\"noopener noreferrer\">Twitter<\/a><\/li>\n<li style=\"text-align: left\"><a href=\"https:\/\/it.linkedin.com\/in\/luigimorelli\" rel=\"noopener noreferrer\">Linkedin<\/a><\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>In questa lezione si imparer\u00e0 ad utilizzare il modulo <a title=\"\" class=\"aalmanual\" target=\"_blank\"   href=\"https:\/\/amzn.to\/2JCZtVg\">RTC<\/a> DS3231. Questo modulo permette di visualizzare l&#8217;anno, il mese, il giorno, l&#8217;ora, il minuto, il secondo e il giorno della settimana corrente. Il modulo in questione \u00e8 alimentato da una piccola batteria. Questa batteria continuer\u00e0 ad alimentare il modulo anche<\/p>\n","protected":false},"author":5,"featured_media":6286,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3,26,92],"tags":[65,656,658,662,172],"class_list":["post-6285","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arduino","category-hardware","category-tutorial","tag-arduino","tag-arduino-tutorial","tag-moduli","tag-rtc","tag-sensori","has-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Arduino: come funziona il modulo RTC (Real Time Clock) - Moreware Blog<\/title>\n<meta name=\"description\" content=\"In questa lezione si imparer\u00e0 ad utilizzare il modulo RTC DS3231. 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