{"id":13157,"date":"2016-12-17T09:00:30","date_gmt":"2016-12-17T00:00:30","guid":{"rendered":"http:\/\/www.techscore.com\/blog\/?p=13157"},"modified":"2018-11-14T16:33:43","modified_gmt":"2018-11-14T07:33:43","slug":"adjust_clock","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2016\/12\/17\/adjust_clock\/","title":{"rendered":"\u6642\u523b\u3092\u3042\u308f\u305b\u3066\u307f\u308b"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001\u30a4\u30f3\u30d5\u30e9\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u4e95\u4e0a\u3067\u3059\u3002<br \/>\n\u3053\u308c\u306f\u3001 <a href=\"http:\/\/www.techscore.com\/blog\/2016\/11\/30\/techscore-advent-calendar-2016\/\">TECHSCORE Advent Calendar 2016<\/a> \u306e17\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n<p>Raspberry Pi 3 Model B\u3092\u8cb7\u3063\u3066\u304d\u305f\u3053\u3068\u3001\u305d\u3057\u3066\u30012017\u5e741\u67081\u65e5\u306e\u3046\u308b\u3046\u79d2\u633f\u5165\u306e\u4ef6\u304c\u6c17\u306b\u306a\u3063\u305f\u3053\u3068\u3092\u304d\u3063\u304b\u3051\u3068\u3057\u3066\u3001\u300c\u6642\u523b\u3092\u3042\u308f\u305b\u3066\u307f\u308b\u300d\u3053\u3068\u3092\u30c6\u30fc\u30de\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n<h2>\u53d6\u308a\u7d44\u3080\u3053\u3068<\/h2>\n<p>Raspberry Pi\u3092\u4f7f\u3063\u3066\u3001Stratum 1\u76f8\u5f53\u306eNTP\u30b5\u30fc\u30d0\u3092\u69cb\u7bc9\u3057\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306fGPS\u306e\u96fb\u6ce2\u3092\u53d7\u4fe1\u3057\u3066\u3001\u6b63\u78ba\u306a\u6642\u9593\u3092\u63d0\u4f9b\u3059\u308b\u30b5\u30fc\u30d0\u3092\u69cb\u7bc9\u3057\u307e\u3059\u3002<\/p>\n<h2>\u4eca\u56de\u306e\u6750\u6599\u306b\u3064\u3044\u3066<\/h2>\n<p>\u4eca\u56de\u306e\u6750\u6599\u306f\u5199\u771f\u306e\u3088\u3046\u306a\u7d44\u307f\u5408\u308f\u305b\u3060\u3051\u3067\u3059\u3002Raspberry Pi 3\u306f\u30b1\u30fc\u30b9\u3068\u306e\u30bb\u30c3\u30c8\u3092\u30b7\u30ea\u30b3\u30f3\u30cf\u30a6\u30b9\u3068\u3044\u3046\u304a\u5e97\u3067\u898b\u3064\u3051\u3066\u304d\u307e\u3057\u305f\u3002\u305d\u306e\u4ed6\u306b\u306f\u3001GlobalSat\u793e\u306e<a href=\"http:\/\/www.globalsat.com.tw\/s\/2\/product-199952\/Cable-GPS-with-USB-interface-SiRF-Star-IV-BU-353S4.html\">USB\u63a5\u7d9a\u578bGPS\u30ec\u30b7\u30fc\u30d0<\/a>\u3001\u305d\u3057\u3066I2C\u63a5\u7d9a\u306eDS3231\u4f7f\u7528RTC\u30e2\u30b8\u30e5\u30fc\u30eb\u3001\u3053\u308c\u3089\u306fAmazon\u306b\u3066\u63c3\u3048\u307e\u3057\u305f\u3002\u3053\u306e\u4e2d\u3067\u307f\u305d\u306a\u306e\u304c\u3001RTC\u30e2\u30b8\u30e5\u30fc\u30eb\u3067\u3059\u306d\u3002Raspberry Pi\u306f\u3001\u901a\u5e38\u3001\u96fb\u6e90\u304c\u843d\u3061\u308b\u3068\u6642\u9593\u60c5\u5831\u3092\u4fdd\u6301\u3067\u304d\u306a\u304f\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u96fb\u6e90\u304c\u843d\u3061\u3066\u3082\u6642\u9593\u60c5\u5831\u3092\u4fdd\u6301\u3057\u7d9a\u3051\u3089\u308c\u308b\u3088\u3046\u306b\u3001\u4eca\u56de\u306f\u3042\u3048\u3066RTC\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u7528\u610f\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n<p><a href=\"https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2016\/12\/timeserver_set.jpg\" rel=\"facebox\" rel=\"attachment wp-att-13161\"><img loading=\"lazy\" class=\"alignleft wp-image-13161 size-medium\" src=\"https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2016\/12\/timeserver_set-300x204.jpg\" alt=\"\u6750\u6599\u4e00\u5f0f\" width=\"300\" height=\"204\" srcset=\"https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2016\/12\/timeserver_set-300x204.jpg 300w, https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2016\/12\/timeserver_set-768x522.jpg 768w, https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2016\/12\/timeserver_set.jpg 958w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2>\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u307e\u308f\u308a\u306e\u6e96\u5099\u306b\u3064\u3044\u3066<\/h2>\n<p>\u4eca\u56de\u3001\u79c1\u306fraspbian\u3092OS\u3068\u3057\u3066\u63a1\u7528\u3057\u307e\u3059\u3002\u5b9f\u306f\u3001\u3053\u306e\u30cd\u30bf\u306f11\u6708\u521d\u65ec\u304b\u3089\u6e96\u5099\u3092\u59cb\u3081\u3066\u3044\u3066\u3044\u308d\u3044\u308d\u8a66\u3057\u3066\u3044\u308b\u3046\u3061\u306b2016\/11\/25\u306b\u65b0\u305f\u306a\u30ea\u30ea\u30fc\u30b9\u304c\u3042\u308a\u3001\u3053\u306e\u8a18\u4e8b\u3092\u66f8\u304d\u306a\u304c\u3089\u3001\u6700\u65b0\u30ea\u30ea\u30fc\u30b9\u306eOS\u306b\u5165\u308c\u66ff\u3048\u3092\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n\u305d\u3057\u3066\u3001GPS\u30ec\u30b7\u30fc\u30d0\u3068RTC\u30e2\u30b8\u30e5\u30fc\u30eb\u3053\u308c\u306f\u3001\u4e16\u306e\u4e2d\u306b\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u60c5\u5831\u3092\u3082\u3068\u306bPlug&amp;Play\u306b\u4efb\u305b\u3089\u308c\u308b\u88fd\u54c1\u3092\u9078\u3093\u3067\u3044\u307e\u3059\u3002GPS\u30ec\u30b7\u30fc\u30d0\u3082\u4eca\u56de\u9078\u3093\u3060\u3082\u306e\u306fSiRFstarIV\u30c1\u30c3\u30d7\u3092\u642d\u8f09\u3057\u305fUSB\u306e\u88fd\u54c1\u3067\u3001\u672c\u7a3f\u5730\u70b9\u306e\u6700\u65b0raspbian\u3067\u306f\u523a\u3059\u3060\u3051\u3067\u8a8d\u8b58\u3067\u304d\u307e\u3059\u3002\u8a8d\u8b58\u3057\u3066\u3044\u308b\u3053\u3068\u306f\u4ee5\u4e0b\u306e\u65b9\u6cd5\u3067\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">root@raspberrypi:\/var\/log# tail -f messages\r\n(...snip..)\r\nDec 14 11:43:50 raspberrypi kernel: [    1.991109] usb 1-1.2: Product: USB-Serial Controller D\r\nDec 14 11:43:50 raspberrypi kernel: [    1.991122] usb 1-1.2: Manufacturer: Prolific Technology Inc.\r\n(...snip..)<\/pre>\n<p>USB\u306bGPS\u30ec\u30b7\u30fc\u30d0\u3092\u523a\u3057\u305f\u969b\u3001\u4e0a\u8a18\u306e\u3088\u3046\u306b\u300cManufacturer: Prolific Technology Inc.\u300d\u3068\u8868\u793a\u3055\u308c\u308c\u3070\u8a8d\u8b58\u3067\u304d\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u8ffd\u8a8d\u3068\u3057\u3066\u4ee5\u4e0b\u3092\u5b9f\u884c\u3057\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"lang:default decode:true\">root@raspberrypi:\/var\/log# lsusb\r\nBus 001 Device 005: ID 04d9:4545 Holtek Semiconductor, Inc.\r\nBus 001 Device 004: ID 056e:00cd Elecom Co., Ltd\r\nBus 001 Device 006: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port\r\nBus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512\/9514 Fast Ethernet Adapter\r\nBus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.\r\nBus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub\r\n<\/pre>\n<p>\u4eca\u56de\u306eGPS\u30ec\u30b7\u30fc\u30d0\u306f\u300cProlific Technology Inc. PL2303 Serial Port\u300d\u306b\u3042\u305f\u308a\u307e\u3059\u306e\u3067\u3001USB\u306e\u8a8d\u8b58\u3082\u3067\u304d\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u307e\u308f\u308a\u306e\u6e96\u5099\u306b\u3064\u3044\u3066<\/h2>\n<p>\u7279\u5225\u306a\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306f\u5229\u7528\u3057\u307e\u305b\u3093\u3002ntpd\u3084chronyd\u306a\u3069\u9078\u629e\u80a2\u306f\u3042\u308a\u307e\u3059\u304c\u3001\u4eca\u56de\u306fraspbian\u306e\u30ec\u30dd\u30b8\u30c8\u30ea\u304b\u3089\u53d6\u5f97\u3067\u304d\u308bntpd\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u4eca\u56de\u3001GPS\u3092\u4f7f\u3046\u3068\u3044\u3046\u3053\u3068\u304b\u3089gpsd\u3082\u4f7f\u7528\u3057\u307e\u3059\u3002\u3068\u3082\u306bapt\u3067\u5165\u624b\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<h2>\u8a2d\u5b9a\u306b\u3064\u3044\u3066<\/h2>\n<p>\u8a2d\u5b9a\u3092\u884c\u308f\u306a\u5206\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u306e\u306fgpsd\u306e\u8a2d\u5b9a\u3068ntpd\u306e\u8a2d\u5b9a\u306e\u307f\u3067\u3057\u305f\u3002\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u306fgpsd\u304b\u3089\u884c\u3063\u305f\u3053\u3068\u3092\u66f8\u304b\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">root@raspberrypi:\/etc# cd \/etc\/default\/\r\nroot@raspberrypi:\/etc\/default# cp gpsd \/root\/\r\nroot@raspberrypi:\/etc\/default# diff gpsd \/root\/gpsd\r\n11c11\r\n&lt; DEVICES=\"\/dev\/ttyUSB0\"\r\n---\r\n&gt; DEVICES=\"\"\r\n14c14\r\n&lt; GPSD_OPTIONS=\"-F \/var\/run\/gpsd.sock -b -n\"\r\n---\r\n&gt; GPSD_OPTIONS=\"\"<\/pre>\n<p>\u3053\u3053\u3067\u3001\u5b9f\u969b\u306b\u884c\u3063\u3066\u3044\u308b\u306e\u306f\u3001gpsd\u306e\u8d77\u52d5\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u5909\u66f4\u3068\u3001GPS\u30ec\u30b7\u30fc\u30d0\u306e\u30c7\u30d0\u30a4\u30b9\u540d\u8a2d\u5b9a\u306e\u307f\u3067\u3059\u3002\u3067\u306f\u3001\u8d77\u52d5\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">root@raspberrypi:\/etc\/default# systemctl enable gpsd\r\nSynchronizing state for gpsd.service with sysvinit using update-rc.d...\r\nExecuting \/usr\/sbin\/update-rc.d gpsd defaults\r\nExecuting \/usr\/sbin\/update-rc.d gpsd enable\r\nroot@raspberrypi:\/etc\/default# systemctl status gpsd\r\n\u25cf gpsd.service - GPS (Global Positioning System) Daemon\r\n   Loaded: loaded (\/lib\/systemd\/system\/gpsd.service; static)\r\n   Active: inactive (dead)\r\nroot@raspberrypi:\/etc\/default# systemctl start gpsd\r\nroot@raspberrypi:\/etc\/default# systemctl status gpsd\r\n\u25cf gpsd.service - GPS (Global Positioning System) Daemon\r\n   Loaded: loaded (\/lib\/systemd\/system\/gpsd.service; static)\r\n   Active: active (running) since Wed 2016-12-14 20:52:07 JST; 1s ago\r\n Main PID: 1424 (gpsd)\r\n   CGroup: \/system.slice\/gpsd.service\r\n           mq1424 \/usr\/sbin\/gpsd -N -F \/var\/run\/gpsd.sock -b -n \/dev\/ttyUSB0\r\n\r\nDec 14 20:52:07 raspberrypi systemd[1]: Started GPS (Global Positioning Syst....\r\nHint: Some lines were ellipsized, use -l to show in full.<\/pre>\n<p>\u8d77\u52d5\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u307f\u308b\u3068GPS\u304c\u6709\u52b9\u306b\u306a\u3063\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u5ff5\u306e\u305f\u3081\u3001\u5f97\u3089\u308c\u308bGPS\u60c5\u5831\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">root@raspberrypi:\/etc\/default#  cgps -s<\/pre>\n<p><a href=\"https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2016\/12\/cpgs.jpg\" rel=\"facebox\" rel=\"attachment wp-att-13351\"><img loading=\"lazy\" class=\"alignleft size-medium wp-image-13351\" src=\"https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2016\/12\/cpgs-300x221.jpg\" alt=\"GPS\u60c5\u5831\u306e\u78ba\u8a8d\" width=\"300\" height=\"221\" srcset=\"https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2016\/12\/cpgs-300x221.jpg 300w, https:\/\/www.techscore.com\/blog\/wp\/wp-content\/uploads\/2016\/12\/cpgs.jpg 659w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u7d50\u679c\u306f\u56f3\u306e\u3088\u3046\u306b\u304d\u3061\u3093\u3068GPS\u304b\u3089\u306e\u60c5\u5831\u304c\u53d6\u5f97\u3067\u304d\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<p>\u3067\u306f\u3001ntpd\u306e\u8a2d\u5b9a\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">root@raspberrypi:\/etc# cp \/etc\/ntp.conf \/root\/\r\nroot@raspberrypi:\/etc# vi \/etc\/ntp.conf\r\nroot@raspberrypi:\/var\/log# diff \/etc\/ntp.conf \/root\/ntp.conf\r\n21,24c21,24\r\n&lt; ### server 0.debian.pool.ntp.org iburst\r\n&lt; ### server 1.debian.pool.ntp.org iburst\r\n&lt; ### server 2.debian.pool.ntp.org iburst\r\n&lt; ### server 3.debian.pool.ntp.org iburst\r\n---\r\n&gt; server 0.debian.pool.ntp.org iburst\r\n&gt; server 1.debian.pool.ntp.org iburst\r\n&gt; server 2.debian.pool.ntp.org iburst\r\n&gt; server 3.debian.pool.ntp.org iburst\r\n26,29d25\r\n&lt;\r\n&lt; # for GPS\r\n&lt; server 127.127.28.0 minpoll 4\r\n&lt; fudge 127.127.28.0 time1 0.183 refid GPS stratum 1<\/pre>\n<p>\u3053\u3061\u3089\u3082\u3001\u305f\u3044\u3057\u305f\u8a2d\u5b9a\u306f\u884c\u3063\u3066\u3044\u307e\u305b\u3093\u3002\u30d1\u30c3\u30b1\u30fc\u30b8\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bntp\u30b5\u30fc\u30d0\u306e\u6307\u5b9a\u3092\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3057\u3001GPS\u30ec\u30b7\u30fc\u30d0\u3092\u30b5\u30fc\u30d0\u3068\u3057\u3066\u6307\u5b9a\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u3059\u3002<br \/>\n\u307e\u305ffudge\u3068\u3057\u3066\u30af\u30ed\u30c3\u30af\u8abf\u6574(0.183\u306fRaspberry Pi3\u3092\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u65b9\u306e\u4f8b\u3092\u63a2\u3059\u4e2d\u3067\u4f8b\u3068\u3057\u3066\u591a\u304b\u3063\u305f\u305f\u3081\u306b\u63a1\u7528\u3057\u307e\u3057\u305f\uff09\u3001\u53c2\u7167\u540d\u3092GPS\u3001Stratam1\u306e\u6307\u5b9a\u3092\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u72b6\u614b\u3067\u8d77\u52d5\u3068\u78ba\u8a8d\u3092\u5b9f\u65bd\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<pre class=\"lang:default decode:true\">root@raspberrypi:\/etc# systemctl start ntp\r\nroot@raspberrypi:\/etc# ntpq -p\r\n     remote           refid      st t when poll reach   delay   offset  jitter\r\n==============================================================================\r\n*SHM(0)          .GPS.            1 l   15   16  377    0.000    0.721   1.430<\/pre>\n<p>\u60f3\u5b9a\u901a\u308a\u3001stratum1\u76f8\u5f53\u306entp\u30b5\u30fc\u30d0\u3068\u3057\u3066\u8d77\u52d5\u3067\u304d\u307e\u3057\u305f\uff08\u4eca\u56de\u306f\u5916\u90e8\u516c\u958b\u307e\u3067\u306f\u6271\u3044\u307e\u305b\u3093\uff09\u3002<br \/>\n\u3061\u306a\u307f\u306b\u3001\u8cfc\u5165\u3057\u305f\u90e8\u54c1\u30ea\u30b9\u30c8\u306bRTC\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u3042\u3063\u305f\u7406\u7531\u304c\u3053\u3053\u306b\u3042\u308b\u306e\u3067\u3059\u304c\u3001ntpd\u306f1000\u79d2\u4ee5\u4e0a\u5dee\u7570\u304c\u3042\u308b\u3068\u30a8\u30e9\u30fc\u3092\u5410\u3044\u3066\u505c\u6b62\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u305f\u3081\u3001\u3044\u3064\u3067\u3082\u304d\u3061\u3093\u3068\u8d77\u52d5\u3055\u305b\u308b\u76ee\u7684\u3067RTC\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u642d\u8f09\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<h2>GPS\u3068\u3046\u308b\u3046\u79d2\u633f\u5165\u306e\u95a2\u4fc2\u306b\u3064\u3044\u3066<\/h2>\n<p>\u4eca\u56de\u3001\u3053\u306e\u30c6\u30fc\u30de\u306b\u53d6\u308a\u7d44\u3082\u3046\u3068\u8003\u3048\u305f\u304d\u3063\u304b\u3051\u306e\uff11\u3064\u306b\u3046\u308b\u3046\u79d2\u3068\u3044\u3046\u8a71\u304c\u3042\u308b\u306e\u3067\u3059\u304c\u3001GPS\u6642\u523b\u306f\u76f4\u63a5\u7684\u306b\u4fee\u6b63\u3055\u308c\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u304b\u308f\u308a\u306b<\/p>\n<pre class=\"lang:default decode:true\">GPS - UTC<\/pre>\n<p>\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u304c\u4f55\u79d2\u3042\u308b\u304b\u3068\u3044\u3046\u60c5\u5831\u304cNavigation Data\u3068\u3057\u3066\u542b\u307e\u308c\u308b\u305f\u3081\u3001\u3053\u308c\u306b\u3088\u308a\u3001\u3046\u308b\u3046\u79d2\u5bfe\u5fdc\u304c\u884c\u308f\u308c\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u304c\u516c\u958b\u3055\u308c\u308b\u5730\u70b9\u3067\u306f17s\u306a\u306e\u3067\u3059\u304c\u3001\u3046\u308b\u3046\u79d2\u633f\u5165\u304c\u767a\u751f\u3059\u308b\u3068\u3053\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u60c5\u5831\u304c18s\u306b\u304b\u308f\u308a\u307e\u3059\u3002\uff082017\u5e74\u3046\u308b\u3046\u79d2\u633f\u5165\u306b\u3064\u3044\u3066\u306e\u8aac\u660e\u3068\u3057\u3066 <a href=\"http:\/\/jjy.nict.go.jp\/news\/leaps2017.html\">\u65e5\u672c\u6a19\u6e96\u6642\u30d7\u30ed\u30b8\u30a7\u30af\u30c8 \u3046\u308b\u3046\u79d2\u306e\u5bfe\u5fdc<\/a>\u00a0\u3084Navigation Center\u306e<a href=\"http:\/\/www.navcen.uscg.gov\/pdf\/gps\/BestPracticesForLeapSecond12312016.pdf\">Best Practices for Leap Second Event Occurring on 31 December 2016<\/a>\u306e\u7b2c\uff16\u9805e\u7bc0\u306a\u3069\u3067\u3082\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\uff09<\/p>\n<h2>\u4eca\u56de\u306e\u30b5\u30fc\u30d0\u306a\u3089\u3001\u96fb\u6ce2\u6642\u8a08\u3082\u3042\u308f\u305b\u3089\u308c\u308b\u306f\u305a<\/h2>\n<p>\u4eca\u56de\u306e\u53d6\u308a\u7d44\u307f\u306e\u4e2d\u3067\u306f\u5b9f\u65bd\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u304c\u3001Raspberry Pi\u3060\u304b\u3089\u3053\u305d\u3001\u96fb\u6ce2\u6642\u8a08\u3092\u3042\u308f\u3059\u4ed5\u7d44\u307f\u3092\u5bb9\u6613\u306b\u5b9f\u73fe\u3067\u304d\u308b\u305d\u3046\u3067\u3059\u3002<br \/>\nGPIO\u3068\u63a5\u7d9a\u3057\u305f\u56de\u8def\u3067LED\u3092\u70b9\u6ec5\u3055\u305b\u308b\u969b\u300140KHz\u306e\u5468\u671f\u306e\u70b9\u6ec5\u3055\u305b\u3001LED\u3092\u70b9\u6ec5\u3055\u305b\u308b\u30b1\u30fc\u30d6\u30eb\u3092\u96fb\u6ce2\u6642\u8a08\u306e\u3059\u3050\u8fd1\u304f\u306b\u7f6e\u304f\u3053\u3068\u3067\u3001\u30b1\u30fc\u30d6\u30eb\u304c\u30a2\u30f3\u30c6\u30ca\u306e\u5f79\u76ee\u3092\u679c\u305f\u3057\u7591\u4f3c\u7684\u306b\u798f\u5cf6\u304b\u3089\u9001\u4fe1\u3055\u308c\u308b\u5468\u6ce2\u6570\u306e\u96fb\u6ce2\u3092\u767a\u4fe1\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305d\u3046\u3067\u3059\uff08\u30b1\u30fc\u30d6\u30eb\u304b\u3089\u6f0f\u308c\u308b\u7a0b\u5ea6\u306e\u96fb\u6ce2\u306a\u306e\u3067\u3001\u96fb\u6ce2\u6cd5\u306a\u3069\u306b\u62b5\u89e6\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u5b9f\u73fe\u3067\u304d\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u3064\u3044\u3066\u306f\u691c\u7d22\u3059\u308c\u3070\u3059\u3050\u306b\u898b\u3064\u3051\u3089\u308c\u308b\u60c5\u5831\u3067\u3059\u306e\u3067\u3001\u4eca\u56de\u3001\u672c\u7a3f\u3067\u306f\u53d6\u308a\u6271\u3063\u3066\u3044\u307e\u305b\u3093\uff09\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u4eca\u56de\u3001\u6271\u3063\u305fRaspberry Pi\u306f\u5b89\u4fa1\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u3067\u304d\u308b\u3053\u3068\u304c\u591a\u305d\u3046\u3067\u9a5a\u3044\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u79c1\u304c\u30a4\u30f3\u30d5\u30e9\u30a8\u30f3\u30b8\u30cb\u30a2\u3068\u3044\u3046\u3053\u3068\u304b\u3089ntp\u30b5\u30fc\u30d0\u3092\u53d6\u308a\u6271\u3044\u307e\u3057\u305f\u304c\u3001\u9055\u3063\u305f\u5f62\u3067\u30a8\u30f3\u30b8\u30e7\u30a4\u3067\u304d\u308b\u53d6\u308a\u7d44\u307f\u306a\u3069\u3092\u3067\u304d\u308b\u3068\u3088\u3044\u306a\u3068\u611f\u3058\u3055\u305b\u3089\u308c\u307e\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001\u30a4\u30f3\u30d5\u30e9\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u4e95\u4e0a\u3067\u3059\u3002<br \/>\n\u3053\u308c\u306f\u3001 TECHSCORE Advent Calendar 2016 \u306e17\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<br \/><a href=\"https:\/\/www.techscore.com\/blog\/2016\/12\/17\/adjust_clock\/\">\u7d9a\u304d\u3092\u8aad\u3080...<\/a><\/p>\n","protected":false},"author":45,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[239],"tags":[141,148],"_links":{"self":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/13157"}],"collection":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/users\/45"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/comments?post=13157"}],"version-history":[{"count":32,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/13157\/revisions"}],"predecessor-version":[{"id":13424,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/13157\/revisions\/13424"}],"wp:attachment":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/media?parent=13157"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/categories?post=13157"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/tags?post=13157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}