{"id":4922,"date":"2023-12-04T03:17:36","date_gmt":"2023-12-04T03:17:36","guid":{"rendered":"https:\/\/www.mixtile.com\/?post_type=ht_kb&#038;p=4922"},"modified":"2023-12-14T06:39:30","modified_gmt":"2023-12-14T06:39:30","slug":"core-3588e-external-rtc","status":"publish","type":"ht_kb","link":"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/","title":{"rendered":"\u5916\u90e8RTC"},"content":{"rendered":"<blockquote class=\"wp-block-quote\"><p>In this document, we use LEETOP A206 carrier board, which provides an RTC slot. Some other models of carrier boards may not provide this slot.<\/p><\/blockquote>\n\n\n\n<p>After Mixtile Core 3588E (hereinafter referred to as Core 3588E) is powered off, the system time stops updating. In order to maintain accurate timekeeping, the carrier board provides external&nbsp;Real Time Clock (RTC) slot, through which you can connect a button cell to track time after power outage.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" src=\"https:\/\/i0.wp.com\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-674x800.jpg?resize=499%2C592&#038;ssl=1\" alt=\"\" class=\"wp-image-5022\" width=\"499\" height=\"592\" srcset=\"https:\/\/i0.wp.com\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-scaled.jpg?resize=674%2C800&amp;ssl=1 674w, https:\/\/i0.wp.com\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-scaled.jpg?resize=337%2C400&amp;ssl=1 337w, https:\/\/i0.wp.com\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-scaled.jpg?resize=768%2C912&amp;ssl=1 768w, https:\/\/i0.wp.com\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-scaled.jpg?resize=42%2C50&amp;ssl=1 42w, https:\/\/i0.wp.com\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-scaled.jpg?resize=1293%2C1536&amp;ssl=1 1293w, https:\/\/i0.wp.com\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-scaled.jpg?resize=1725%2C2048&amp;ssl=1 1725w, https:\/\/i0.wp.com\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-scaled.jpg?resize=10%2C12&amp;ssl=1 10w, https:\/\/i0.wp.com\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-scaled.jpg?resize=600%2C713&amp;ssl=1 600w, https:\/\/i0.wp.com\/www.mixtile.com\/app\/uploads\/2023\/12\/rtc-scaled.jpg?w=2040&amp;ssl=1 2040w\" sizes=\"(max-width: 499px) 100vw, 499px\" data-recalc-dims=\"1\" \/><figcaption>Figure 1. A button cell installed in the RTC slot<\/figcaption><\/figure>\n\n\n\n<h2>\u6e96\u5099<\/h2>\n\n\n\n<ul><li><a href=\"https:\/\/www.mixtile.com\/ja\/docs\/getting-started-with-core-3588e\/#set-up-connections\">Core 3588E\u306e\u63a5\u7d9a\u8a2d\u5b9a<\/a>.<\/li><li>\u4ee5\u4e0b\u306e\u3044\u305a\u308c\u304b\u306e\u65b9\u6cd5\u3067Core 3588E\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u307e\u3059\uff1a<ul><li><a href=\"https:\/\/www.mixtile.com\/ja\/docs\/login-to-core-3588e-using-adb\/\">ADB\u30c4\u30fc\u30eb\u3092\u4f7f\u3063\u3066\u30ed\u30b0\u30a4\u30f3\u3059\u308b<\/a><\/li><li><a href=\"https:\/\/www.mixtile.com\/ja\/docs\/serial-login-to-core-3588e\/\">\u30b7\u30ea\u30a2\u30eb\u901a\u4fe1\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u305f\u30ed\u30b0\u30a4\u30f3<\/a><\/li><li><a href=\"https:\/\/www.mixtile.com\/ja\/docs\/login-to-core-3588e-via-ssh\/\">SSH\u3092\u4f7f\u7528\u3057\u3066\u30ed\u30b0\u30a4\u30f3\u3059\u308b<\/a><\/li><\/ul><\/li><\/ul>\n\n\n\n<ul><li>A button cell<\/li><\/ul>\n\n\n\n<h3 id=\"ExternalRTC-Step1.Connectabuttoncell\">Step 1. Install a button cell<\/h3>\n\n\n\n<p>1.1 Remove the power adapter from the carrier board.<\/p>\n\n\n\n<p>1.2 Locate the RTC slot on the carrier board. Press the button cell into the RTC slot until the button cell is fully seated on the carrier board.<\/p>\n\n\n\n<p>1.3 Connect the power adapter to the carrier board again.<\/p>\n\n\n\n<h3>Step 2. Calibrate system time<\/h3>\n\n\n\n<p>With an Ethernet cable connected, system time is automatically updated. If system time is not correct, you can manually update system time. For details, see <a href=\"https:\/\/help.ubuntu.com\/community\/UbuntuTime\">Ubuntu Time Management.<\/a> <\/p>\n\n\n\n<h3 id=\"ExternalRTC-Step2.Synchronizesystemtimetohardware\">Step 3. Synchronize system time to hardware<\/h3>\n\n\n\n<ul><li>Check system time by running the following command:<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>date<\/code><\/pre>\n\n\n\n<p>\u30b3\u30de\u30f3\u30c9\u306e\u51fa\u529b\u306f\u4ee5\u4e0b\u306e\u901a\u308a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Wed Nov 22 01:55:21 AM EST 2023<\/code><\/pre>\n\n\n\n<ul><li>Check hardware time by running the following command:<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>hwclock<\/code><\/pre>\n\n\n\n<p>\u30b3\u30de\u30f3\u30c9\u306e\u51fa\u529b\u306f\u4ee5\u4e0b\u306e\u901a\u308a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>2021-01-01 07:00:44.337625-05:00<\/code><\/pre>\n\n\n\n<p>It can be seen that the hardware time is different from system time.&nbsp;Synchronize hardware time from system time by running the following command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo hwclock -w<\/code><\/pre>\n\n\n\n<p>Then, run the&nbsp;<code>hwclock<\/code>&nbsp;command again. You can see that the hardware time is the same as the system time.<\/p>\n\n\n\n<p>After Core 3588E is powered off and powered again next time, the system time will be the latest time, thanks to the RTC feature.<\/p>\n\n\n\n<h3 id=\"ExternalRTC-Othermethodstocheckhardwaretime\">Other methods to check hardware time<\/h3>\n\n\n\n<p>You can check the current date and time set on the hardware clock using two methods:<\/p>\n\n\n\n<p>Method 1: Using cat commands<\/p>\n\n\n\n<p>To check the date, enter:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo cat \/sys\/class\/rtc\/rtc0\/date<\/code><\/pre>\n\n\n\n<p>This prints out the current hardware date. <\/p>\n\n\n\n<p>To check the time, enter:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo cat \/sys\/class\/rtc\/rtc0\/time<\/code><\/pre>\n\n\n\n<p>This prints out the current hardware time.<\/p>\n\n\n\n<p>Method 2:<strong> <\/strong>Using the hwclock utility<\/p>\n\n\n\n<p>Enter the command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sudo hwclock -f \/dev\/rtc0<\/code><\/pre>\n\n\n\n<p>This prints out the current date and time from the hardware clock.<\/p>","protected":false},"excerpt":{"rendered":"<p>In this document, we use LEETOP A206 carrier board, which provides an RTC slot. Some other models of carrier boards may not provide this slot. After Mixtile Core 3588E (hereinafter referred to as Core 3588E) is powered off, the system time stops updating. In order to maintain accurate timekeeping, the carrier board provides external&nbsp;Real Time [&#8230;]","protected":false},"author":1,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"spay_email":""},"ht-kb-category":[156],"ht-kb-tag":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>External RTC | Mixtile<\/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:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"External RTC | Mixtile\" \/>\n<meta property=\"og:description\" content=\"In this document, we use LEETOP A206 carrier board, which provides an RTC slot. Some other models of carrier boards may not provide this slot. After Mixtile Core 3588E (hereinafter referred to as Core 3588E) is powered off, the system time stops updating. In order to maintain accurate timekeeping, the carrier board provides external&nbsp;Real Time [...]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/\" \/>\n<meta property=\"og:site_name\" content=\"Mixtile\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-14T06:39:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-674x800.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\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\":\"Organization\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/#organization\",\"name\":\"Mixtile Limited\",\"url\":\"https:\/\/www.mixtile.com\/ja\/\",\"sameAs\":[],\"logo\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/#logo\",\"inLanguage\":\"ja\",\"url\":\"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2022\/02\/logo.svg\",\"contentUrl\":\"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2022\/02\/logo.svg\",\"caption\":\"Mixtile Limited\"},\"image\":{\"@id\":\"https:\/\/www.mixtile.com\/ja\/#logo\"}},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/#website\",\"url\":\"https:\/\/www.mixtile.com\/ja\/\",\"name\":\"Mixtile\",\"description\":\"Hardware for IoT Solutions\",\"publisher\":{\"@id\":\"https:\/\/www.mixtile.com\/ja\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.mixtile.com\/ja\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"ja\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#primaryimage\",\"inLanguage\":\"ja\",\"url\":\"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-674x800.jpg\",\"contentUrl\":\"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-674x800.jpg\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#webpage\",\"url\":\"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/\",\"name\":\"External RTC | Mixtile\",\"isPartOf\":{\"@id\":\"https:\/\/www.mixtile.com\/ja\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#primaryimage\"},\"datePublished\":\"2023-12-04T03:17:36+00:00\",\"dateModified\":\"2023-12-14T06:39:30+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.mixtile.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"External RTC\"}]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"External RTC | Mixtile","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/","og_locale":"ja_JP","og_type":"article","og_title":"External RTC | Mixtile","og_description":"In this document, we use LEETOP A206 carrier board, which provides an RTC slot. Some other models of carrier boards may not provide this slot. After Mixtile Core 3588E (hereinafter referred to as Core 3588E) is powered off, the system time stops updating. In order to maintain accurate timekeeping, the carrier board provides external&nbsp;Real Time [...]","og_url":"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/","og_site_name":"Mixtile","article_modified_time":"2023-12-14T06:39:30+00:00","og_image":[{"url":"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-674x800.jpg"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Organization","@id":"https:\/\/www.mixtile.com\/ja\/#organization","name":"Mixtile Limited","url":"https:\/\/www.mixtile.com\/ja\/","sameAs":[],"logo":{"@type":"ImageObject","@id":"https:\/\/www.mixtile.com\/ja\/#logo","inLanguage":"ja","url":"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2022\/02\/logo.svg","contentUrl":"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2022\/02\/logo.svg","caption":"Mixtile Limited"},"image":{"@id":"https:\/\/www.mixtile.com\/ja\/#logo"}},{"@type":"WebSite","@id":"https:\/\/www.mixtile.com\/ja\/#website","url":"https:\/\/www.mixtile.com\/ja\/","name":"Mixtile","description":"Hardware for IoT Solutions","publisher":{"@id":"https:\/\/www.mixtile.com\/ja\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.mixtile.com\/ja\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"ja"},{"@type":"ImageObject","@id":"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#primaryimage","inLanguage":"ja","url":"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-674x800.jpg","contentUrl":"https:\/\/dh19rycdk230a.cloudfront.net\/app\/uploads\/2023\/12\/rtc-674x800.jpg"},{"@type":"WebPage","@id":"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#webpage","url":"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/","name":"External RTC | Mixtile","isPartOf":{"@id":"https:\/\/www.mixtile.com\/ja\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#primaryimage"},"datePublished":"2023-12-04T03:17:36+00:00","dateModified":"2023-12-14T06:39:30+00:00","breadcrumb":{"@id":"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#breadcrumb"},"inLanguage":"ja","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.mixtile.com\/ja\/docs\/core-3588e-external-rtc\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.mixtile.com\/"},{"@type":"ListItem","position":2,"name":"External RTC"}]}]}},"_links":{"self":[{"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/ht-kb\/4922"}],"collection":[{"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/comments?post=4922"}],"version-history":[{"count":7,"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/ht-kb\/4922\/revisions"}],"predecessor-version":[{"id":5097,"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/ht-kb\/4922\/revisions\/5097"}],"wp:attachment":[{"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/media?parent=4922"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/ht-kb-category?post=4922"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/www.mixtile.com\/ja\/wp-json\/wp\/v2\/ht-kb-tag?post=4922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}