{"id":1081,"date":"2016-01-24T21:27:13","date_gmt":"2016-01-24T21:27:13","guid":{"rendered":"http:\/\/wp.andreas.bieri.name\/myblog\/?p=1081"},"modified":"2016-01-24T21:27:13","modified_gmt":"2016-01-24T21:27:13","slug":"ds1307-rtc-democode","status":"publish","type":"post","link":"http:\/\/wp.andreas.bieri.name\/myblog\/2016\/01\/24\/ds1307-rtc-democode\/","title":{"rendered":"DS1307 RTC Democode"},"content":{"rendered":"<p><span style=\"color: #3366ff;\">\/\/ Date and time functions using a DS1307 RTC connected via I2C and Wire lib<\/span><\/p>\n<pre>#include &lt;Wire.h&gt;\n#include \"RTClib.h\"<\/pre>\n<pre>#if defined(ARDUINO_ARCH_SAMD)\u00a0 \/\/ for Zero, output on USB Serial console\n\u00a0\u00a0 #define Serial SerialUSB\n#endif<\/pre>\n<pre>RTC_DS1307 rtc;<\/pre>\n<pre>void setup () {\n\u00a0 while (!Serial);\u00a0 \/\/ for Leonardo\/Micro\/Zero<\/pre>\n<pre>\u00a0 Serial.begin(57600);\n\u00a0 Wire.begin();\n\u00a0 rtc.begin();<\/pre>\n<pre>\u00a0 if (! rtc.isrunning()) {\n\u00a0\u00a0\u00a0 Serial.println(\"RTC is NOT running!\");\n\u00a0\u00a0\u00a0 \/\/ following line sets the RTC to the date &amp; time this sketch was compiled\n\u00a0\u00a0\u00a0 rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));\n\u00a0\u00a0\u00a0 \/\/ This line sets the RTC with an explicit date &amp; time, for example to set\n\u00a0\u00a0\u00a0 \/\/ January 21, 2014 at 3am you would call:\n\u00a0\u00a0\u00a0 \/\/ rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));\n\u00a0 }\n}<\/pre>\n<pre>void loop () {\n\u00a0\u00a0\u00a0 DateTime now = rtc.now();\n\u00a0\u00a0\u00a0 \n\u00a0\u00a0\u00a0 Serial.print(now.year(), DEC);\n\u00a0\u00a0\u00a0 Serial.print('\/');\n\u00a0\u00a0\u00a0 Serial.print(now.month(), DEC);\n\u00a0\u00a0\u00a0 Serial.print('\/');\n\u00a0\u00a0\u00a0 Serial.print(now.day(), DEC);\n\u00a0\u00a0\u00a0 Serial.print(' ');\n\u00a0\u00a0\u00a0 Serial.print(now.hour(), DEC);\n\u00a0\u00a0\u00a0 Serial.print(':');\n\u00a0\u00a0\u00a0 Serial.print(now.minute(), DEC);\n\u00a0\u00a0\u00a0 Serial.print(':');\n\u00a0\u00a0\u00a0 Serial.print(now.second(), DEC);\n\u00a0\u00a0\u00a0 Serial.println();\n\u00a0\u00a0\u00a0 \n\u00a0\u00a0\u00a0 Serial.print(\" since midnight 1\/1\/1970 = \");\n\u00a0\u00a0\u00a0 Serial.print(now.unixtime());\n\u00a0\u00a0\u00a0 Serial.print(\"s = \");\n\u00a0\u00a0\u00a0 Serial.print(now.unixtime() \/ 86400L);\n\u00a0\u00a0\u00a0 Serial.println(\"d\");\n\u00a0\u00a0\u00a0 \n\u00a0\u00a0\u00a0 \/\/ calculate a date which is 7 days and 30 seconds into the future\n\u00a0\u00a0\u00a0 DateTime future (now.unixtime() + 7 * 86400L + 30);\n\u00a0\u00a0\u00a0 \n\u00a0\u00a0\u00a0 Serial.print(\" now + 7d + 30s: \");\n\u00a0\u00a0\u00a0 Serial.print(future.year(), DEC);\n\u00a0\u00a0\u00a0 Serial.print('\/');\n\u00a0\u00a0\u00a0 Serial.print(future.month(), DEC);\n\u00a0\u00a0\u00a0 Serial.print('\/');\n\u00a0\u00a0\u00a0 Serial.print(future.day(), DEC);\n\u00a0\u00a0\u00a0 Serial.print(' ');\n\u00a0\u00a0\u00a0 Serial.print(future.hour(), DEC);\n\u00a0\u00a0\u00a0 Serial.print(':');\n\u00a0\u00a0\u00a0 Serial.print(future.minute(), DEC);\n\u00a0\u00a0\u00a0 Serial.print(':');\n\u00a0\u00a0\u00a0 Serial.print(future.second(), DEC);\n\u00a0\u00a0\u00a0 Serial.println();\n\u00a0\u00a0\u00a0 \n\u00a0\u00a0\u00a0 Serial.println();\n\u00a0\u00a0\u00a0 delay(3000);\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\/\/ Date and time functions using a DS1307 RTC connected via I2C and Wire lib #include &lt;Wire.h&gt; #include &#8222;RTClib.h&#8220; #if defined(ARDUINO_ARCH_SAMD)\u00a0 \/\/ for Zero, output on USB Serial console \u00a0\u00a0 #define Serial SerialUSB #endif RTC_DS1307 rtc; void setup () { \u00a0 while (!Serial);\u00a0 \/\/ for Leonardo\/Micro\/Zero \u00a0 Serial.begin(57600); \u00a0 Wire.begin(); \u00a0 rtc.begin(); \u00a0 if (! [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[113],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>DS1307 RTC Democode - Merkbar.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/ec2-52-29-166-97.eu-central-1.compute.amazonaws.com\/myblog\/2016\/01\/24\/ds1307-rtc-democode\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DS1307 RTC Democode - Merkbar.\" \/>\n<meta property=\"og:description\" content=\"\/\/ Date and time functions using a DS1307 RTC connected via I2C and Wire lib #include &lt;Wire.h&gt; #include &quot;RTClib.h&quot; #if defined(ARDUINO_ARCH_SAMD)\u00a0 \/\/ for Zero, output on USB Serial console \u00a0\u00a0 #define Serial SerialUSB #endif RTC_DS1307 rtc; void setup () { \u00a0 while (!Serial);\u00a0 \/\/ for Leonardo\/Micro\/Zero \u00a0 Serial.begin(57600); \u00a0 Wire.begin(); \u00a0 rtc.begin(); \u00a0 if (! 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