{"id":98640,"date":"2024-10-30T14:34:08","date_gmt":"2024-10-30T06:34:08","guid":{"rendered":"\/\/www.viralrail.com\/?p=98640"},"modified":"2024-10-30T14:34:12","modified_gmt":"2024-10-30T06:34:12","slug":"lwgsbysmy","status":"publish","type":"post","link":"\/\/www.viralrail.com\/blog\/98640.html","title":{"rendered":"LoRa\u7f51\u5173\u8bbe\u5907\u6709\u4ec0\u4e48\u7528"},"content":{"rendered":"\n<p>\u3000\u3000<strong>LoRa\u7f51\u5173\u8bbe\u5907<\/strong>\u4e3b\u8981\u7528\u4e8e\u7269\u8054\u7f51(IoT)\u4e2d\u7684\u6570\u636e\u4f20\u8f93\u548c\u7ba1\u7406\uff0c\u5177\u6709\u591a\u79cd\u529f\u80fd\u548c\u7528\u9014\u3002\u4ee5\u4e0b\u662fLoRa\u7f51\u5173\u7684\u4e3b\u8981\u7528\u9014\u548c\u529f\u80fd\uff1a<\/p>\n\n\n\n<ul 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class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001 LoRa\u7f51\u5173\u8bbe\u5907\u5728\u519c\u4e1a\u3001\u667a\u6167\u57ce\u5e02\u548c\u5de5\u4e1a\u76d1\u63a7\u7b49\u9886\u57df\u7684\u5177\u4f53\u5e94\u7528<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u7f51\u5173\u8bbe\u5907\u5728\u519c\u4e1a\u3001\u667a\u6167\u57ce\u5e02\u548c\u5de5\u4e1a\u76d1\u63a7\u7b49\u9886\u57df\u7684\u5177\u4f53\u5e94\u7528\u6848\u4f8b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u519c\u4e1a\u9886\u57df<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u667a\u6167\u519c\u4e1a\u76d1\u6d4b<\/strong>\uff1aLoRa\u7f51\u5173\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u667a\u6167\u519c\u4e1a\u4e2d\uff0c\u7528\u4e8e\u5b9e\u65f6\u76d1\u6d4b\u519c\u7530\u73af\u5883\u53c2\u6570\u3002\u4f8b\u5982\uff0c\u5728\u5965\u5730\u5229\u7684\u4e00\u4e2a\u9879\u76ee\u4e2d\uff0c\u661f\u7eb5\u667a\u80fd\u5229\u7528LoRa\u7f51\u5173\u901a\u4fe1\u6280\u672f\u6210\u529f\u90e8\u7f72\u4e86\u519c\u4f5c\u7269\u751f\u957f\u73af\u5883\u76d1\u6d4b\u7cfb\u7edf\u3002\u901a\u8fc7\u5728\u519c\u7530\u4e2d\u90e8\u7f72LoRa\u4f20\u611f\u5668\u8282\u70b9\uff0c\u53ef\u4ee5\u5b9e\u65f6\u76d1\u6d4b\u571f\u58e4\u6e7f\u5ea6\u3001\u6e29\u5ea6\u3001\u5149\u7167\u5f3a\u5ea6\u7b49\u5173\u952e\u73af\u5883\u53c2\u6570\uff0c\u5e76\u5c06\u6570\u636e\u4e0a\u4f20\u81f3\u4e91\u5e73\u53f0\uff0c\u519c\u6237\u53ef\u4ee5\u901a\u8fc7\u624b\u673aAPP\u6216\u7535\u8111\u7aef\u8fdb\u884c\u67e5\u770b\u548c\u7ba1\u7406\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u667a\u80fd\u704c\u6e89\u7cfb\u7edf<\/strong>\uff1a\u57fa\u4e8eLoRa\u7f51\u5173\u7684\u667a\u80fd\u704c\u6e89\u7cfb\u7edf\u7ed3\u5408\u571f\u58e4\u6c34\u5206\u76d1\u6d4b\u7cfb\u7edf\u548c\u6c14\u8c61\u76d1\u6d4b\u7ad9\u7684\u6570\u636e\uff0c\u5b9e\u73b0\u4e86\u5168\u81ea\u52a8\u8bbe\u65bd\u519c\u4e1a\u548c\u5927\u7530\u519c\u4e1a\u7684\u667a\u80fd\u63a7\u5236\u3002\u8fd9\u79cd\u7cfb\u7edf\u80fd\u591f\u6839\u636e\u5b9e\u65f6\u6570\u636e\u81ea\u52a8\u8c03\u6574\u704c\u6e89\u91cf\uff0c\u4ece\u800c\u63d0\u9ad8\u6c34\u8d44\u6e90\u5229\u7528\u6548\u7387\u5e76\u51cf\u5c11\u6d6a\u8d39\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u5927\u68da\u7ba1\u7406<\/strong>\uff1a\u5728\u519c\u4e1a\u79cd\u690d\u5927\u68da\u4e2d\uff0c\u901a\u8fc7\u4f7f\u7528LoRa\u7f51\u5173\u548c\u667a\u80fd\u65e0\u7ebf\u6e29\u6e7f\u5ea6\u91c7\u96c6\u5355\u5143\uff0c\u53ef\u4ee5\u76d1\u6d4b\u5927\u68da\u5185\u7684\u7a7a\u6c14\u6e29\u6e7f\u5ea6\u3001\u571f\u58e4\u6e29\u6e7f\u5ea6\u3001CO2\u6d53\u5ea6\u548c\u5149\u7167\u5ea6\u7b49\u53c2\u6570\uff0c\u5e76\u63d0\u9192\u5f02\u5e38\u60c5\u51b5\uff0c\u5b9e\u73b0\u79d1\u5b66\u79cd\u690d\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. \u667a\u6167\u57ce\u5e02\u9886\u57df<\/h3>\n\n\n\n<p>\u3000\u3000\u867d\u7136\u6211\u641c\u7d22\u5230\u7684\u8d44\u6599\u4e3b\u8981\u96c6\u4e2d\u5728\u519c\u4e1a\u9886\u57df\uff0c\u4f46LoRa\u6280\u672f\u5728\u667a\u6167\u57ce\u5e02\u4e2d\u7684\u5e94\u7528\u4e5f\u5177\u6709\u6f5c\u529b\u3002LoRa\u7f51\u5173\u53ef\u4ee5\u7528\u4e8e\u57ce\u5e02\u57fa\u7840\u8bbe\u65bd\u7684\u8fdc\u7a0b\u76d1\u63a7\u548c\u7ba1\u7406\uff0c\u5982\u667a\u80fd\u7167\u660e\u3001\u4ea4\u901a\u7ba1\u7406\u548c\u73af\u5883\u76d1\u6d4b\u7b49\u3002\u7531\u4e8eLoRa\u6280\u672f\u652f\u6301\u957f\u8ddd\u79bb\u4f4e\u529f\u8017\u4f20\u8f93\uff0c\u8fd9\u4f7f\u5f97\u5176\u975e\u5e38\u9002\u5408\u7528\u4e8e\u57ce\u5e02\u4e2d\u7684\u5404\u79cd\u7269\u8054\u7f51\u5e94\u7528\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30003. 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class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u7aef\u5230\u7aef\u52a0\u5bc6<\/strong>\uff1aLoRaWAN\u91c7\u7528AES-128\u4f4d\u52a0\u5bc6\u7b97\u6cd5\u5bf9\u4f20\u8f93\u6570\u636e\u8fdb\u884c\u7aef\u5230\u7aef\u52a0\u5bc6\uff0c\u786e\u4fdd\u6570\u636e\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u4e0d\u88ab\u7be1\u6539\u6216\u7a83\u53d6\uff0c\u4fdd\u969c\u901a\u4fe1\u5b89\u5168\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u53cc\u91cd\u52a0\u5bc6\u673a\u5236<\/strong>\uff1aLoRaWAN\u4e0d\u4ec5\u5728\u7ec8\u7aef\u5230\u7f51\u5173\u4e4b\u95f4\u4f7f\u7528AES-128\u52a0\u5bc6\uff0c\u8fd8\u5728\u7f51\u5173\u5230\u540e\u7aef\u670d\u52a1\u5668\u4e4b\u95f4\u8fdb\u884cBASE64\u52a0\u5bc6\u3002\u8fd9\u79cd\u53cc\u91cd\u52a0\u5bc6\u673a\u5236\u8fdb\u4e00\u6b65\u589e\u5f3a\u4e86\u6570\u636e\u4f20\u8f93\u7684\u5b89\u5168\u6027\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4f1a\u8bdd\u5bc6\u94a5\u7ba1\u7406<\/strong>\uff1aLoRaWAN\u4f7f\u7528\u4e24\u4e2a128\u4f4d\u7684\u4f1a\u8bdd\u5bc6\u94a5(Network Session Key\u548cApplication Session Key)\u6765\u5206\u522b\u52a0\u5bc6MAC\u6d88\u606f\u548c\u5e94\u7528\u7a0b\u5e8f\u6d88\u606f\u3002\u8fd9\u4e9b\u5bc6\u94a5\u8981\u4e48\u5728\u7f16\u7a0b\u65f6\u63d0\u4f9b\u7ed9\u7ec8\u7aef\u8bbe\u5907\uff0c\u8981\u4e48\u901a\u8fc7\u4e2d\u95f4\u5bc6\u94a5\u751f\u6210\u6b65\u9aa4\u83b7\u5f97\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u5d4c\u5165\u5f0f\u70b9\u5bf9\u70b9\u52a0\u5bc6<\/strong>\uff1a\u5728\u67d0\u4e9b\u5e94\u7528\u573a\u666f\u4e2d\uff0c\u5982\u667a\u80fd\u5bb6\u5c45\u7cfb\u7edf\uff0cLoRa\u7f51\u5173\u91c7\u7528\u5d4c\u5165\u5f0f\u70b9\u5bf9\u70b9AES-128\u6570\u636e\u52a0\u5bc6\u6280\u672f\uff0c\u89e3\u51b3\u4e86\u667a\u80fd\u9501\u4e0e\u7f51\u5173\u4e4b\u95f4\u7684\u4f20\u8f93\u5b89\u5168\u6027\u95ee\u9898\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4f4e\u529f\u8017\u8bbe\u8ba1<\/strong>\uff1aLoRa\u534f\u8bae\u91c7\u7528\u7684AES-128\u52a0\u5bc6\u7b97\u6cd5\u4e0d\u9700\u8981\u9ad8\u8ba1\u7b97\u80fd\u529b\u5373\u53ef\u5b9e\u73b0\u52a0\u5bc6\u548c\u89e3\u5bc6\uff0c\u8fd9\u5bf9\u4e8eLPWAN\u8bbe\u5907\u6765\u8bf4\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u4eec\u901a\u5e38\u9700\u8981\u4f4e\u529f\u8017\u4ee5\u5ef6\u957f\u7535\u6c60\u5bff\u547d\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6807\u51c6\u5316\u548c\u4e92\u64cd\u4f5c\u6027<\/strong>\uff1aLoRaWAN\u89c4\u8303\u786e\u4fdd\u4e86\u5168\u7403\u5e94\u7528\u7a0b\u5e8f\u3001\u7269\u8054\u7f51\u89e3\u51b3\u65b9\u6848\u63d0\u4f9b\u5546\u548c\u7535\u4fe1\u8fd0\u8425\u5546\u4e4b\u95f4\u7684\u4e92\u64cd\u4f5c\u6027\uff0c\u5e76\u5185\u7f6e\u4e86\u7aef\u5230\u7aef\u7684AES-128\u52a0\u5bc6\uff0c\u63d0\u4f9b\u6700\u4f73\u9690\u79c1\u548c\u4fdd\u62a4\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001 LoRa\u7f51\u5173\u7684\u4f4e\u529f\u8017\u8bbe\u8ba1\u662f\u5982\u4f55\u5b9e\u73b0\u7684\uff0c\u4e0e\u4f20\u7edf\u7269\u8054\u7f51\u8bbe\u5907\u76f8\u6bd4\u6709\u54ea\u4e9b\u4f18\u52bf?<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u7f51\u5173\u7684\u4f4e\u529f\u8017\u8bbe\u8ba1\u4e3b\u8981\u901a\u8fc7\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u4f4e\u529f\u8017\u8bbe\u8ba1<\/strong>\uff1aLoRa\u7ec8\u7aef\u91c7\u7528\u4e86\u4f4e\u529f\u8017\u8bbe\u8ba1\uff0c\u80fd\u591f\u5728\u7535\u6c60\u4f9b\u7535\u7684\u60c5\u51b5\u4e0b\u957f\u65f6\u95f4\u8fd0\u884c\u3002\u76f8\u6bd4\u4e8e\u5176\u4ed6\u65e0\u7ebf\u901a\u4fe1\u6280\u672f\uff0cLoRa\u7ec8\u7aef\u7684\u529f\u8017\u66f4\u4f4e\uff0c\u5ef6\u957f\u4e86\u8bbe\u5907\u7684\u4f7f\u7528\u5bff\u547d\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9ad8\u63a5\u6536\u7075\u654f\u5ea6\u548c\u4f4e\u529f\u8017<\/strong>\uff1aLoRa\u4f20\u8f93\u901a\u9053\u5e26\u5bbd\u4e3a157db\uff0c\u7406\u8bba\u4f20\u8f93\u8ddd\u79bb\u53ef\u8fbe15km\u3002LoRa\u7684\u5de5\u4f5c\u7535\u6d41\u4ec5\u4e3a10mA\uff0c\u5f85\u673a\u7535\u6d41\u4e3a200na\uff0c\u5de5\u4f5c\u529f\u8017\u6781\u4f4e\uff0c\u5927\u5927\u589e\u52a0\u4e86\u7535\u6c60\u7684\u4f7f\u7528\u5bff\u547d\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u81ea\u9002\u5e94\u6570\u636e\u901f\u7387\uff08ADR\uff09<\/strong>&nbsp;\uff1a\u4e3a\u4e86\u8282\u7701\u7535\u6c60\u5bff\u547d\uff0c\u7f51\u5173\u53ef\u4ee5\u901a\u8fc7\u5b9e\u65bd\u81ea\u9002\u5e94\u6570\u636e\u901f\u7387(ADR)\u6765\u6700\u5927\u5316\u8282\u80fd\u6548\u679c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000\u4e0e\u4f20\u7edf\u7269\u8054\u7f51\u8bbe\u5907\u76f8\u6bd4\uff0cLoRa\u7f51\u5173\u5177\u6709\u4ee5\u4e0b\u4f18\u52bf\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000<strong>\u957f\u7535\u6c60\u5bff\u547d<\/strong>\uff1aLoRa\u8bbe\u8ba1\u7528\u4e8e\u4f4e\u529f\u8017\u5e94\u7528\uff0c\u8bbe\u5907\u7535\u6c60\u5bff\u547d\u53ef\u8fbe10\u81f320\u5e74\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u9ad8\u5bb9\u91cf\u8986\u76d6<\/strong>\uff1a\u5355\u4e2aLoRa\u7f51\u5173\u53ef\u4ee5\u8986\u76d6\u6574\u4e2a\u57ce\u5e02\u6216\u6570\u767e\u5e73\u65b9\u516c\u91cc\uff0c\u652f\u6301\u5927\u91cf\u8bbe\u5907\u8fde\u63a5\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u4f4e\u6210\u672c<\/strong>\uff1a\u76f8\u6bd4\u8702\u7a9d\u7f51\u7edc\uff0cLoRa\u7ec8\u7aef\u8282\u70b9\u6210\u672c\u8f83\u4f4e\uff0c\u4e14\u65e0\u9700\u590d\u6742\u7684\u7535\u529b\u57fa\u7840\u8bbe\u65bd\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u6297\u5e72\u6270\u6027\u5f3a<\/strong>\uff1aLoRa\u65e0\u7ebf\u4f20\u8f93\u7684\u7279\u70b9\u5c31\u662f\u53ef\u4ee5\u652f\u6301\u591a\u8282\u70b9\u4f20\u8f93\u3001\u529f\u8017\u4f4e\u3001\u6297\u5e72\u6270\u6027\u5f3a\u3002<\/li>\n\n\n\n<li>\u3000\u3000<strong>\u5e7f\u6cdb\u7684\u5e94\u7528\u573a\u666f<\/strong>\uff1aLoRa\u4f5c\u4e3a\u4f4e\u529f\u8017\u65e0\u7ebf\u6807\u51c6\u5728\u8fdc\u8ddd\u79bb\u901a\u4fe1\u4e2d\u7684\u4f18\u52bf\uff0c\u4ee5\u53ca\u5176\u5728\u4e0d\u540c\u573a\u666f\u5982\u4f01\u4e1a\u3001\u519c\u4e1a\u3001\u667a\u80fd\u57ce\u5e02\u7b49\u7684\u5e94\u7528\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u56db\u3001 LoRa\u7f51\u5173\u652f\u6301\u7684\u8fdc\u7a0b\u914d\u7f6e\u3001\u8fdc\u7a0b\u5347\u7ea7\u548c\u8fdc\u7a0b\u76d1\u6d4b\u529f\u80fd\u662f\u5982\u4f55\u5de5\u4f5c\u7684?<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u7f51\u5173\u652f\u6301\u7684\u8fdc\u7a0b\u914d\u7f6e\u3001\u8fdc\u7a0b\u5347\u7ea7\u548c\u8fdc\u7a0b\u76d1\u6d4b\u529f\u80fd\u4e3b\u8981\u901a\u8fc7ZWS\u7269\u8054\u7f51\u4e91\u5e73\u53f0\u5b9e\u73b0\u3002\u4ee5\u4e0b\u662f\u8fd9\u4e9b\u529f\u80fd\u7684\u5177\u4f53\u5de5\u4f5c\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<p>\u3000\u3000\u7ba1\u7406\u5458\u53ef\u4ee5\u901a\u8fc7ZWS\u7269\u8054\u7f51\u4e91\u5e73\u53f0\u5728\u7ebf\u96c6\u4e2d\u7ba1\u7406LoRa\u7f51\u5173\uff0c\u8fdc\u7a0b\u67e5\u770b\u5176\u5728\u7ebf\u548c\u79bb\u7ebf\u72b6\u6001\uff0c\u5e76\u7edf\u4e00\u7ba1\u7406\u7f51\u5173\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u8fdc\u7a0b\u914d\u7f6e\u7f51\u5173\u53c2\u6570\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u8fdc\u7a0b\u5347\u7ea7\u5206\u4e3a\u4e09\u4e2a\u6b65\u9aa4\uff1a\u5c06\u56fa\u4ef6\u5305\u4e0a\u4f20\u5230ZWS\u4e91\u3001\u4e91\u7aef\u5bf9\u6bd4\u7248\u672c\u5e76\u4e0b\u53d1\u901a\u77e5\u3001\u7f51\u5173\u81ea\u52a8\u4e0b\u8f7d\u5347\u7ea7\u5305\u5e76\u5b8c\u6210\u5347\u7ea7\u3002\u5177\u4f53\u64cd\u4f5c\u65b9\u6cd5\u662f\u767b\u5f55ZWS\u7269\u8054\u7f51\u4e91\u5e73\u53f0\uff0c\u8fdb\u5165\u201c\u56fa\u4ef6\u7ba1\u7406\u201d\u9875\u9762\uff0c\u5728\u81ea\u5b9a\u4e49\u56fa\u4ef6\u9875\u9762\u6dfb\u52a0\u56fa\u4ef6\u5e76\u4e0a\u4f20\uff0c\u7136\u540e\u9009\u62e9\u5347\u7ea7\u8303\u56f4\u548c\u65b9\u5f0f\uff0c\u6700\u540e\u8bbe\u5907\u7aef\u6536\u5230\u901a\u77e5\u540e\u81ea\u52a8\u5347\u7ea7\u3002<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u7f51\u5173\u652f\u6301\u8fdc\u7a0b\u7edf\u8ba1\u4e0a\u4e0b\u884c\u6570\u636e\u5e27\u3001\u4fe1\u9053\u8d1f\u8f7d\u7387\u548c\u7a7a\u95f2\u4fe1\u9053\u626b\u63cf\u7b49\u4fe1\u606f\uff0c\u4ee5\u5b9e\u73b0\u5bf9\u5de5\u4e1a\u73af\u5883\u548c\u8bbe\u5907\u72b6\u6001\u7684\u76d1\u6d4b\u548c\u91c7\u96c6\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e94\u3001 LoRa\u7f51\u5173\u5728\u591a\u63a5\u53e3\u652f\u6301\u548c\u6269\u5c55\u6027\u65b9\u9762\u6709\u54ea\u4e9b\u5177\u4f53\u7684\u6280\u672f\u7ec6\u8282\u548c\u5e94\u7528\u573a\u666f?<\/h2>\n\n\n\n<p>\u3000\u3000LoRa\u7f51\u5173\u5728\u591a\u63a5\u53e3\u652f\u6301\u548c\u6269\u5c55\u6027\u65b9\u9762\u5177\u6709\u663e\u8457\u7684\u6280\u672f\u7ec6\u8282\u548c\u5e7f\u6cdb\u7684\u5e94\u7528\u573a\u666f\u3002\u4ee5\u4e0b\u662f\u5177\u4f53\u7684\u6280\u672f\u7ec6\u8282\u548c\u5e94\u7528\u573a\u666f\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u6280\u672f\u7ec6\u8282<\/h3>\n\n\n\n<p>\u3000\u3000<strong>\u534f\u8bae\u652f\u6301<\/strong>\uff1a<\/p>\n\n\n\n<p>\u3000\u3000LoRa\u7f51\u5173\u652f\u6301\u591a\u79cd\u901a\u4fe1\u534f\u8bae\uff0c\u5305\u62ec\u6807\u51c6\u7684MODBUS RTU\u548cMODBUS TCP\u534f\u8bae\uff0c\u4ee5\u53ca\u6269\u5c55\u7684MODBUS RTU\u548cMODBUS 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