<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">Long Range 의 약자인 LoRa.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">저전력 장거리 통신이 가능한 프로토콜로, 국내에선 SK가 LoRaWAN 망을 구축하여 서비스 중이다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">LoRaWAN 은 LoRA PHY, 즉 물리적 통신 프로토콜을 기반으로 암호화, 노드 관리 등을 가능케하는 프로토콜이다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">SK의 LoRaWAN 는 비용도 들고 이래저래 번거로운 점이 많았고, 일단 LoRa 모듈 자체를 사용해보고 싶었다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">(SK LoRa 모듈도 가지고 있기 때문에 언젠가 기회가 있다면 테스트를...)</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; text-align: center; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;"><span class="imageblock" style="margin: 5px 0px; padding: 0px; border: none; line-height: 1.5; display: inline-block; width: 300px; height: auto; max-width: 100%;"><span data-url="https://t1.daumcdn.net/cfile/tistory/992B7D465B33DCA91D?download" data-lightbox="lightbox" style="margin: 0px; padding: 0px; border: none; line-height: 1.5; cursor: pointer;"><img src="https://t1.daumcdn.net/cfile/tistory/992B7D465B33DCA91D" width="300" filename="스크린샷 2018-06-28 오전 3.50.49.png" filemime="image/jpeg" style="margin: 0px; padding: 0px; border: 0px; line-height: 1.5; cursor: pointer; max-width: 100%; height: auto;" /></span></span></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; text-align: center; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;">aliexpress 에서 구매한 sx1276 모듈.&nbsp;<a href="https://ko.aliexpress.com/item/2pcs-lot-868MHz-915MHz-100mW-sx1276-chip-long-range-4Km-RF-Wireless-LoRa-Module-LoRa1276/32338274153.html" target="_blank" class="tx-link" style="margin: 0px; padding: 0px; border: none; line-height: 1.5; color: #4f4f4f;">내가 구매한 링크</a>는 여기.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;">한국에서는&nbsp;<b style="margin: 0px; padding: 0px; border: none; line-height: 1.5;"><u style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">915MHz</u></b>&nbsp;를 사용하면 된다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;">구매하면 구매자가 친절히 이런저런 데이터시트 등을 메일로 보내주는데.. 딱히 필요없었다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;">내가 구매한 17년도 12월엔 $16.48/2개 였는데, 글 작성 시점에는 $13.11/2개 정도.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;">송수신이 가능하므로 2개 이상이 있으면 된다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;"><a target="_blank" href="https://www.aliexpress.com/item/LG01-S-LoRa-Gateway/32807236424.html" class="lnk-product-name" style="margin: 0px; padding: 0px; border: 0px; line-height: 16px; font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-senif, SimSun, 宋体; color: #333333; box-sizing: content-box; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; vertical-align: baseline;">LG01-S&nbsp;</a>등&nbsp;<a target="_blank" href="https://www.aliexpress.com/item/LG01-S-LoRa-Gateway/32807236424.html" class="lnk-product-name" style="margin: 0px; padding: 0px; border: 0px; line-height: 16px; font-family: &quot;Open Sans&quot;, Arial, Helvetica, sans-senif, SimSun, 宋体; color: #333333; box-sizing: content-box; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; vertical-align: baseline;">LoRa Gateway</a>&nbsp;같은 것도 판매는 하는데, 얘들은 그냥 LoRa 모듈과 인터넷 연결을 편하게 해뒀을 뿐 꼭 필요한건 아니니 당장은 필요없음.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; text-align: center; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;"><span class="imageblock" style="margin: 5px 0px; padding: 0px; border: none; line-height: 1.5; display: inline-block; width: 663px; height: auto; max-width: 100%;"><span data-url="https://t1.daumcdn.net/cfile/tistory/9934E8495B33DDF920?download" data-lightbox="lightbox" style="margin: 0px; padding: 0px; border: none; line-height: 1.5; cursor: pointer;"><img src="https://t1.daumcdn.net/cfile/tistory/9934E8495B33DDF920" width="663" filename="IMG_3963.jpg" filemime="image/jpeg" style="margin: 0px; padding: 0px; border: 0px; line-height: 1.5; cursor: pointer; max-width: 100%; height: auto;" /><span class="ExifInfo" style="margin: 5px auto 0px; padding: 0px; border: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 8pt; line-height: normal; font-family: tahoma; color: #777777; display: block;"><span style="margin: 0px; padding: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; display: inline-block !important;">Apple<span class="exifBar" style="margin: 0px 2px; padding: 0px; border: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: Arial; color: #cccccc; display: inline-block !important;">|</span></span><span style="margin: 0px; padding: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; display: inline-block !important;">iPhone 7<span class="exifBar" style="margin: 0px 2px; padding: 0px; border: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: Arial; color: #cccccc; display: inline-block !important;">|</span></span><span style="margin: 0px; padding: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; display: inline-block !important;">Normal program<span class="exifBar" style="margin: 0px 2px; padding: 0px; border: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: Arial; color: #cccccc; display: inline-block !important;">|</span></span><span style="margin: 0px; padding: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; display: inline-block !important;">4.0mm<span class="exifBar" style="margin: 0px 2px; padding: 0px; border: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 7pt; line-height: normal; font-family: Arial; color: #cccccc; display: inline-block !important;">|</span></span><span style="margin: 0px; padding: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; display: inline-block !important;">2018:06:28 03:44:15</span></span></span></span></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">핀간격이 빵판용이 아니라 납땜이 좀 많이 귀찮다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">SPI 통신을 사용하며, 전원과 수신용 인터럽트 핀(DIO0)까지 총 8개가 필요하다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">인터럽트 핀을 생략한다면 7개 핀으로 가능.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">동봉된 안테나까지 납땜을 하면 완성!</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">나는 두개의 아두이노 UNO 와 연결을 하였고,</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">LoRa 모듈의 작동 전압은 3.3v 이지만, 그동안&nbsp;경험상 전원만 3.3v 에 물려주면 별 문제가 없었으니 그냥 진행했다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<table class="txc-table" width="205" cellspacing="0" cellpadding="0" border="0" 맑은="" 고딕",="" sans-serif;font-size:13px"="" style="margin: 0px; padding: 0px; border-width: initial; border-style: none; border-color: initial; line-height: 1.5; font-family: dotum, sans-serif; color: #717171; background-color: #ececec; width: 205px;">
   <tbody style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
      <tr style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
         <td style="margin: 0px; padding: 0px; border-style: solid; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; text-align: center; padding-top: 0px !important; padding-bottom: 0px !important;"><b style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">Arduino Uno&nbsp;</b></p>
            </td>
         <td style="margin: 0px; padding: 0px; border-style: solid solid solid none; border-left-width: initial; border-left-color: initial; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; text-align: center; padding-top: 0px !important; padding-bottom: 0px !important;">&nbsp;<b style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">LoRa sx1276</b></p>
            </td>
         </tr>
      <tr style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">GND</p>
            </td>
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left: none; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">GND&nbsp;</p>
            </td>
         </tr>
      <tr style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">&nbsp;13</p>
            </td>
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left: none; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">SCK</p>
            </td>
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      <tr style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">&nbsp;12</p>
            </td>
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left: none; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">MISO&nbsp;</p>
            </td>
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      <tr style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">&nbsp;11</p>
            </td>
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left: none; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">MOSI&nbsp;</p>
            </td>
         </tr>
      <tr style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">&nbsp;10</p>
            </td>
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left: none; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">NSS&nbsp;</p>
            </td>
         </tr>
      <tr style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">&nbsp;2</p>
            </td>
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left: none; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">DIO0&nbsp;</p>
            </td>
         </tr>
      <tr style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">&nbsp;3.3V</p>
            </td>
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left: none; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">VCC&nbsp;</p>
            </td>
         </tr>
      <tr style="margin: 0px; padding: 0px; border: none; line-height: 1.5;">
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">&nbsp;8</p>
            </td>
         <td style="margin: 0px; padding: 0px; border-top: none; border-right-style: solid; border-bottom-style: solid; border-left: none; line-height: 1.5; width: 102px; height: 24px;">
            <p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; margin-block-start: 1em; margin-block-end: 1em; padding-top: 0px !important; padding-bottom: 0px !important;">NRESET&nbsp;</p>
            </td>
         </tr>
      </tbody>
   </table>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">검색해보니 5v circuit 출력 3.3v circuit 입력의 경우에만 전압 조정을 해주면 된다고 하던데 난 저항 등을 달았을 경우 오히려 작동이 안되어서 전부 바로 연결하였음.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">아두이노 라이브러리는 Sandeep Mistry의 LoRa 를 사용하였다. Arduino 라이브러리 매니저에 있지만,</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">링크는&nbsp;<a href="https://github.com/sandeepmistry/arduino-LoRa" target="_blank" class="tx-link" style="margin: 0px; padding: 0px; border: none; line-height: 1.5; color: #4f4f4f;">https://github.com/sandeepmistry/arduino-LoRa</a></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">코드야 예제코드가 잘 만들어져이으니 참고하면 됨.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">나의 경우&nbsp;송신/수신 나눠서 테스트를 하였고, 송신부가 두번째&nbsp;LoRa.endPacket() 이 무한 blocking 되는 문제가 있었다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">그냥 모듈 두개를 서로&nbsp;바꿔주니 해결이 되었음.. 아마 납땜과정에서 모듈 하나가 송신이 안되는 불구가 된 듯하다ㅠㅠㅠ</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; text-align: center; clear: none; float: none; padding-top: 0px !important; padding-bottom: 0px !important;"><span class="imageblock" style="margin: 5px 0px; padding: 0px; border: none; line-height: 1.5; display: inline-block; width: 400px; height: auto; max-width: 100%;"><span data-url="https://t1.daumcdn.net/cfile/tistory/99AA31485B33E0F224?download" data-lightbox="lightbox" style="margin: 0px; padding: 0px; border: none; line-height: 1.5; cursor: pointer;"><img src="https://t1.daumcdn.net/cfile/tistory/99AA31485B33E0F224" width="400" filename="IMG_3961.jpg" filemime="image/jpeg" style="margin: 0px; padding: 0px; border: 0px; line-height: 1.5; cursor: pointer; max-width: 100%; height: auto;" /><span class="ExifInfo" style="margin: 5px auto 0px; padding: 0px; border: none; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; font-size: 8pt; line-height: normal; font-family: tahoma; color: #777777; display: block; width: 400px;"><span style="margin: 0px; padding: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; display: inline-block !important;">2018:06:28 03:40:58</span></span></span></span></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">거리 테스트..</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">송신기를 건물 안에 두니 밖으로 나가면 바로 안되어서, 야외에 두고(71m 거리 태그가 있는 곳)&nbsp;움직여보았다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">안테나가 별로인건지, 내가 잘못 납땜한건지 여튼 저 정도 거리까지만 수신이 되었음...ㅠ</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">송신기를 좀 높은 곳에 두고&nbsp;안테나를 잘 세팅한다면.... 더 잘되지 않을까 기대를 해본다.</p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;"><br style="margin: 0px; padding: 0px; border: none; line-height: 1.5;" /></p>
<p style="padding-right: 0px; padding-left: 0px; border: none; line-height: 1.5; font-family: dotum, sans-serif; margin-block-start: 1em; margin-block-end: 1em; color: #717171; background-color: #ececec; padding-top: 0px !important; padding-bottom: 0px !important;">일단 통신이 되긴 했으니 만족!</p>