{"id":18887,"date":"2025-01-16T15:18:17","date_gmt":"2025-01-16T07:18:17","guid":{"rendered":"https:\/\/mnya.tw\/cc\/?p=18887"},"modified":"2025-01-16T21:12:02","modified_gmt":"2025-01-16T13:12:02","slug":"2373","status":"publish","type":"post","link":"https:\/\/mnya.tw\/cc\/word\/2373.html","title":{"rendered":"MQTT \u8cc7\u6599\u50b3\u905e\u7684\u53ef\u9760\u6027\u9078\u64c7\uff1a\u7406\u89e3 QoS \u7d1a\u5225"},"content":{"rendered":"<p>\u5728\u7269\u806f\u7db2\u61c9\u7528\u548c\u8a0a\u606f\u50b3\u905e\u7cfb\u7d71\u4e2d\uff0c\u5982\u4f55\u78ba\u4fdd\u8a0a\u606f\u53ef\u9760\u9001\u9054\u662f\u4e00\u500b\u95dc\u9375\u8ab2\u984c\u3002<strong>MQTT\uff08Message Queuing Telemetry Transport\uff09<\/strong>\u5354\u8b70\u91dd\u5c0d\u9019\u4e00\u9700\u6c42\uff0c\u63d0\u4f9b\u4e86\u4e09\u500b\u4e0d\u540c\u7684<strong>\u670d\u52d9\u54c1\u8cea\uff08Quality of Service\uff0c\u7c21\u7a31 QoS\uff09<\/strong>\u7d1a\u5225\uff0c\u8b93\u958b\u767c\u8005\u80fd\u4f9d\u64da\u61c9\u7528\u9700\u6c42\u5728\u53ef\u9760\u6027\u8207\u6548\u7387\u9593\u53d6\u5f97\u5e73\u8861\u3002\u4ee5\u4e0b\u5c07\u6df1\u5165\u8aaa\u660e\u9019\u4e09\u500b\u7d1a\u5225\u53ca\u5176\u61c9\u7528\u5834\u666f\uff0c\u5e6b\u52a9\u60a8\u9078\u64c7\u6700\u9069\u5408\u7684\u8a2d\u5b9a\u4ee5\u6eff\u8db3\u7cfb\u7d71\u9700\u6c42\u3002<\/p>\n<h2><span style=\"color: #000080;\">QoS \u7d1a\u5225\u8a73\u89e3<\/span><\/h2>\n<p><strong>QoS 0\uff08At most once\uff09\uff1a<\/strong> \u5728\u9019\u500b\u7d1a\u5225\u4e2d\uff0c\u767c\u9001\u65b9\u5c07\u8a0a\u606f\u767c\u9001\u7d66\u63a5\u6536\u65b9\uff0c\u4e0d\u9700\u8981\u63a5\u6536\u65b9\u767c\u9001\u78ba\u8a8d\u3002\u9019\u662f\u6700\u4e0d\u53ef\u9760\u7684\u7d1a\u5225\uff0c\u767c\u9001\u65b9\u4e0d\u6703\u77e5\u9053\u63a5\u6536\u65b9\u662f\u5426\u6210\u529f\u6536\u5230\u8a0a\u606f\uff0c\u4e5f\u4e0d\u6703\u91cd\u8a66\u767c\u9001\u3002\u8a0a\u606f\u53ef\u80fd\u6703\u4e1f\u5931\uff0c\u4f46\u662f\u50b3\u8f38\u6548\u7387\u6700\u9ad8\u3002<br \/>\n<strong>QoS 1\uff08At least once\uff09\uff1a<\/strong> \u5728\u9019\u500b\u7d1a\u5225\u4e2d\uff0c\u767c\u9001\u65b9\u6703\u78ba\u4fdd\u63a5\u6536\u65b9\u81f3\u5c11\u6536\u5230\u4e00\u6b21\u8a0a\u606f\u3002\u767c\u9001\u65b9\u6703\u7b49\u5f85\u63a5\u6536\u65b9\u7684\u78ba\u8a8d\uff0c\u5982\u679c\u78ba\u8a8d\u4e1f\u5931\u6216\u672a\u6536\u5230\uff0c\u767c\u9001\u65b9\u6703\u91cd\u65b0\u50b3\u9001\u8a0a\u606f\uff0c\u76f4\u5230\u63a5\u6536\u65b9\u767c\u9001\u78ba\u8a8d\u70ba\u6b62\u3002\u9019\u78ba\u4fdd\u4e86\u8a0a\u606f\u7684\u53ef\u9760\u6027\uff0c\u4f46\u53ef\u80fd\u6703\u589e\u52a0\u4e00\u4e9b\u50b3\u8f38\u5ef6\u9072\u3002<br \/>\n<strong>QoS 2\uff08Exactly once\uff09\uff1a<\/strong> \u9019\u662f\u6700\u53ef\u9760\u7684\u7d1a\u5225\uff0c\u767c\u9001\u65b9\u548c\u63a5\u6536\u65b9\u90fd\u6703\u78ba\u4fdd\u8a0a\u606f\u6070\u597d\u50b3\u905e\u4e00\u6b21\u3002\u767c\u9001\u65b9\u6703\u7b49\u5f85\u63a5\u6536\u65b9\u7684\u78ba\u8a8d\uff0c\u4e26\u4e14\u63a5\u6536\u65b9\u6703\u8a18\u9304\u6536\u5230\u7684\u8a0a\u606f\uff0c\u4ee5\u907f\u514d\u91cd\u8907\u8655\u7406\u3002\u9019\u7a2e\u7d1a\u5225\u5728\u4fdd\u8b49\u8a0a\u606f\u7684\u53ef\u9760\u6027\u7684\u540c\u6642\uff0c\u53ef\u80fd\u6703\u5f15\u5165\u66f4\u591a\u7684\u50b3\u8f38\u5ef6\u9072\u548c\u8907\u96dc\u6027\u3002<\/p><div class=\"3a456c955cc9861673f62d33beb7714e\" data-index=\"2\" style=\"float: none; margin:0px;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-2683739050533486\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2683739050533486\"\r\n     data-ad-slot=\"3270345536\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>\u9078\u64c7\u9069\u7576\u7684 QoS \u7d1a\u5225\u53d6\u6c7a\u65bc\u61c9\u7528\u7684\u9700\u6c42\u548c\u6027\u80fd\u8981\u6c42\u3002\u5728\u6548\u7387\u8207\u53ef\u9760\u6027\u4e4b\u9593\u627e\u5230\u5e73\u8861\uff0c\u662f\u7cfb\u7d71\u8a2d\u8a08\u7684\u6838\u5fc3\u3002<\/p>\n<h2><span style=\"color: #000080;\">\u9084\u662f\u4e0d\u61c2\u600e\u9ebc\u8fa6\uff1f<\/span><\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u6bb5\u4ee5\u570b\u5c0f\u751f\u5c31\u80fd\u61c2\u7684\u65b9\u5f0f\u89e3\u91cb MQTT \u7684 QoS \u7d1a\u5225\uff1a<\/p>\n<p>\u60f3\u50cf\u4e00\u4e0b\uff0c\u4f60\u8981\u50b3\u4e00\u5f35\u7d19\u689d\u7d66\u4f60\u7684\u670b\u53cb\uff0c\u9019\u4e09\u7a2e\u65b9\u6cd5\u5c31\u662f QoS \u7684\u610f\u601d\uff1a<\/p>\n<p><strong>QoS 0\uff08At most once\uff09\uff1a<\/strong>\u4f60\u628a\u7d19\u689d\u4e1f\u5230\u670b\u53cb\u684c\u4e0a\u5c31\u8d70\u4e86\uff0c\u5b8c\u5168\u4e0d\u78ba\u5b9a\u670b\u53cb\u6709\u6c92\u6709\u770b\u5230\u3002\u5982\u679c\u7d19\u689d\u6389\u5230\u5730\u4e0a\u4e86\uff0c\u90a3\u5c31\u6c92\u8fa6\u6cd5\u4e86\uff0c\u4f46\u9019\u6a23\u6700\u5feb\u3002<br \/>\n<strong>QoS 1\uff08At least once\uff09\uff1a<\/strong>\u4f60\u628a\u7d19\u689d\u4ea4\u7d66\u670b\u53cb\uff0c\u7136\u5f8c\u7b49\u670b\u53cb\u9ede\u982d\u78ba\u8a8d\u6536\u5230\u3002\u842c\u4e00\u670b\u53cb\u6c92\u9ede\u982d\uff0c\u4f60\u5c31\u518d\u62ff\u4e00\u5f35\u4e00\u6a21\u4e00\u6a23\u7684\u7d19\u689d\u7d66\u4ed6\uff0c\u76f4\u5230\u4ed6\u9ede\u982d\u70ba\u6b62\u3002\u6709\u53ef\u80fd\u670b\u53cb\u6703\u6536\u5230\u5169\u5f35\u4e00\u6a23\u7684\u7d19\u689d\uff0c\u4f46\u81f3\u5c11\u4e0d\u6703\u6f0f\u6389\u3002<br \/>\n<strong>QoS 2\uff08Exactly once\uff09\uff1a<\/strong>\u9019\u6b21\u4f60\u5f88\u5c0f\u5fc3\uff0c\u628a\u7d19\u689d\u4ea4\u7d66\u670b\u53cb\u5f8c\uff0c\u4f60\u5011\u9084\u8981\u518d\u4e09\u78ba\u8a8d\uff0c\u78ba\u4fdd\u670b\u53cb\u53ea\u62ff\u5230\u4e00\u5f35\u7d19\u689d\uff0c\u7d55\u5c0d\u4e0d\u6703\u91cd\u8907\u3002\u9019\u6a23\u6700\u5b89\u5168\uff0c\u4f46\u4e5f\u6700\u82b1\u6642\u9593\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u9078\u64c7\u54ea\u7a2e\u65b9\u6cd5\u770b\u60c5\u6cc1\u5566\uff01\u5982\u679c\u53ea\u662f\u5e73\u5e38\u50b3\u8a71\uff0cQoS 0 \u5c31\u5920\u4e86\uff1b\u5982\u679c\u662f\u91cd\u8981\u7684\u4e8b\u60c5\uff0c\u50cf\u9080\u8acb\u670b\u53cb\u53c3\u52a0\u751f\u65e5\u6703\uff0c\u53ef\u80fd\u9700\u8981 QoS 1 \u6216 QoS 2\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/mnya.tw\/cc\/wp-content\/uploads\/2025\/2373-1.jpg\" width=\"1024\" height=\"768\" \/><br \/>\n\u25b2 \u7cbe\u9078\u5716\u7247\u3002<\/p>\n\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>\u5728\u7269\u806f\u7db2\u61c9\u7528\u548c\u8a0a\u606f\u50b3\u905e\u7cfb\u7d71\u4e2d\uff0c\u5982\u4f55\u78ba\u4fdd\u8a0a\u606f\u53ef\u9760\u9001\u9054\u662f\u4e00\u500b\u95dc\u9375\u8ab2\u984c\u3002MQTT\uff08Message Queuing Telemetry Transport\uff09\u5354\u8b70\u91dd\u5c0d\u9019\u4e00\u9700\u6c42\uff0c\u63d0\u4f9b\u4e86\u4e09\u500b\u4e0d\u540c\u7684 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18888,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,566],"tags":[],"class_list":["post-18887","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","category-iot"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>MQTT \u8cc7\u6599\u50b3\u905e\u7684\u53ef\u9760\u6027\u9078\u64c7\uff1a\u7406\u89e3 QoS \u7d1a\u5225 - \u840c\u82bd\u7d9c\u5408\u5929\u5730 - \u840c\u82bd\u7db2\u9801<\/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:\/\/mnya.tw\/cc\/word\/2373.html\" \/>\n<meta property=\"og:locale\" content=\"zh_TW\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MQTT \u8cc7\u6599\u50b3\u905e\u7684\u53ef\u9760\u6027\u9078\u64c7\uff1a\u7406\u89e3 QoS \u7d1a\u5225 - \u840c\u82bd\u7d9c\u5408\u5929\u5730 - \u840c\u82bd\u7db2\u9801\" \/>\n<meta property=\"og:description\" content=\"\u5728\u7269\u806f\u7db2\u61c9\u7528\u548c\u8a0a\u606f\u50b3\u905e\u7cfb\u7d71\u4e2d\uff0c\u5982\u4f55\u78ba\u4fdd\u8a0a\u606f\u53ef\u9760\u9001\u9054\u662f\u4e00\u500b\u95dc\u9375\u8ab2\u984c\u3002MQTT\uff08Message Queuing Telemetry Transport\uff09\u5354\u8b70\u91dd\u5c0d\u9019\u4e00\u9700\u6c42\uff0c\u63d0\u4f9b\u4e86\u4e09\u500b\u4e0d\u540c [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mnya.tw\/cc\/word\/2373.html\" \/>\n<meta property=\"og:site_name\" content=\"\u840c\u82bd\u7d9c\u5408\u5929\u5730\" \/>\n<meta property=\"article:published_time\" content=\"2025-01-16T07:18:17+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-01-16T13:12:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mnya.tw\/cc\/wp-content\/uploads\/2025\/2373-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"768\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"\u840c\u82bd\u7ad9\u9577\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@https:\/\/x.com\/qwe987299\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005:\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u840c\u82bd\u7ad9\u9577\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9810\u4f30\u95b1\u8b80\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\u9418\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/mnya.tw\\\/cc\\\/word\\\/2373.html#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/mnya.tw\\\/cc\\\/word\\\/2373.html\"},\"author\":{\"name\":\"\u840c\u82bd\u7ad9\u9577\",\"@id\":\"https:\\\/\\\/mnya.tw\\\/cc\\\/#\\\/schema\\\/person\\\/28e9ae25bc418b8ec216b7aa2c848faa\"},\"headline\":\"MQTT \u8cc7\u6599\u50b3\u905e\u7684\u53ef\u9760\u6027\u9078\u64c7\uff1a\u7406\u89e3 QoS 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