{"id":574,"date":"2024-04-01T12:54:51","date_gmt":"2024-04-01T04:54:51","guid":{"rendered":"https:\/\/3dok.biz\/wordpress\/?p=574"},"modified":"2024-04-01T13:03:14","modified_gmt":"2024-04-01T05:03:14","slug":"esp32-%e6%96%b0%e5%a2%9e%e7%a1%ac%e9%ab%94%e5%ba%8f%e5%88%97%e4%b8%b2%e5%8f%a3-2-%e7%af%84%e4%be%8b","status":"publish","type":"post","link":"https:\/\/3dok.biz\/wordpress\/?p=574","title":{"rendered":"ESP32 \u65b0\u589e\u786c\u9ad4\u5e8f\u5217\u4e32\u53e3 2 \u7bc4\u4f8b"},"content":{"rendered":"\t\t
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https:\/\/circuits4you.com\/2018\/12\/31\/esp32-hardware-serial2-example\/<\/a><\/p>

ESP32<\/strong><\/span>\u4e0a\u67093 \u500b\u4e32\u5217\u57e0\uff0c\u5206\u5225\u70baU0UXD\u3001U1UXD \u548c U2UXD\u00a0<\/strong>\uff0c\u7686\u5de5\u4f5c\u5728 3.3V TTL \u96fb\u5e73<\/strong>\u3002 ESP32 \u4e0a\u6709\u4e09\u500b\u786c\u9ad4\u652f\u63f4\u7684\u4e32\u884c\u63a5\u53e3\uff0c<\/strong>\u7a31\u70ba UART0\u3001UART1 \u548c UART2\u3002\u8207\u6240\u6709\u5468\u908a\u4e00\u6a23\uff0cUART \u7684\u5f15\u8173\u53ef\u4ee5\u5728\u908f\u8f2f\u4e0a\u5c0d\u61c9\u5230 ESP32 \u4e0a\u7684\u4efb\u4f55\u53ef\u7528\u5f15\u8173\u3002\u7136\u800c\uff0cUART \u4e5f\u53ef\u4ee5\u76f4\u63a5\u8a2a\u554f\uff0c\u5f9e\u800c\u7565\u5fae\u63d0\u9ad8\u6548\u80fd\u3002\u6b64\u786c\u9ad4\u8f14\u52a9\u7684\u5f15\u8173\u6620\u5c04\u8868\u5982\u4e0b\u3002<\/span><\/p>
\u4e32\u53e3<\/th>\u63a5\u6536\u8f38\u5165\u8f38\u51fa<\/th>\u767c\u9001IO<\/th>CTS<\/th>\u5373\u6642\u50b3\u8f38\u7cfb\u7d71<\/th><\/tr>
\u4e32\u53e30<\/td>GPIO3<\/td>GPIO1<\/td>\u4e0d\u9069\u7528<\/td>\u4e0d\u9069\u7528<\/td><\/tr>
\u4e32\u53e31<\/td>GPIO9<\/td>GPIO10<\/td>GPIO6<\/td>GPIO11<\/td><\/tr>
\u4e32\u53e32<\/td>GPIO16<\/td>GPIO17<\/td>GPIO8<\/td>GPIO7<\/td><\/tr><\/tbody><\/table>

\u8a71\u96d6\u5982\u6b64\uff0c\u6211\u5efa\u8b70\u4f7f\u7528\u7684 UART \u9a45\u52d5\u7a0b\u5f0f\u6c92\u6709\u5167\u5efa\u9019\u7a2e\u7d1a\u5225\u7684\u512a\u5316\uff0c\u56e0\u6b64\uff0c\u60a8\u5e7e\u4e4e\u53ef\u4ee5\u81ea\u7531\u5730\u4f7f\u7528\u60a8\u9078\u64c7\u7684\u4efb\u4f55\u5f15\u8173\u3002<\/span><\/p>

\u4e32\u53e3\u7c21\u4ecb<\/h3>

UART \u4ee3\u8868\u901a\u7528\u975e\u540c\u6b65\u63a5\u6536\u5668\/\u767c\u9001\u5668\u3002\u5b83\u4e0d\u662f\u50cf SPI \u548c I2C \u9019\u6a23\u7684\u901a\u8a0a\u5354\u8b70\uff0c\u800c\u662f\u5fae\u63a7\u5236\u5668\u4e2d\u7684\u7269\u7406\u96fb\u8def\uff0c\u6216\u7368\u7acb\u7684 IC\u3002 UART \u7684\u4e3b\u8981\u7528\u9014\u662f\u50b3\u9001\u548c\u63a5\u6536\u4e32\u5217\u8cc7\u6599\u3002 UART \u901a\u8a0a\u7c21\u4ecb UART \u901a\u8a0a\u662f\u5169\u500b UART \u76f4\u63a5\u76f8\u4e92\u901a\u8a0a\u3002\u767c\u9001UART\u5c07\u4f86\u81eaCPU\u7b49\u63a7\u5236\u8a2d\u5099\u7684\u4e26\u884c\u8cc7\u6599\u8f49\u63db\u70ba\u4e32\u884c\u5f62\u5f0f\uff0c\u5c07\u5176\u4e32\u884c\u767c\u9001\u5230\u63a5\u6536UART\uff0c\u7136\u5f8c\u63a5\u6536UART\u5c07\u4e32\u884c\u6578\u64da\u8f49\u63db\u56de\u4e26\u884c\u6578\u64da\u4ee5\u4f9b\u63a5\u6536\u8a2d\u5099\u4f7f\u7528\u3002\u53ea\u9700\u5169\u6839\u7dda\u5373\u53ef\u5728\u5169\u500b UART \u4e4b\u9593\u50b3\u8f38\u8cc7\u6599\u3002\u8cc7\u6599\u5f9e\u767c\u9001 UART \u7684 Tx \u5f15\u8173\u6d41\u5411\u63a5\u6536 UART \u7684 Rx \u5f15\u8173\u3002<\/p>

UART \u975e\u540c\u6b65\u50b3\u8f38\u6578\u64da\uff0c\u9019\u610f\u5473\u8457\u6c92\u6709\u6642\u8108\u8a0a\u865f\u4f86\u540c\u6b65\u767c\u9001 UART \u7684\u4f4d\u5143\u8f38\u51fa\u548c\u63a5\u6536 UART \u7684\u4f4d\u5143\u53d6\u6a23\u3002\u767c\u9001 UART \u5411\u6b63\u5728\u50b3\u8f38\u7684\u8cc7\u6599\u5305\u6dfb\u52a0\u8d77\u59cb\u4f4d\u5143\u548c\u505c\u6b62\u4f4d\uff0c\u800c\u4e0d\u662f\u6642\u8108\u8a0a\u865f\u3002\u9019\u4e9b\u4f4d\u5143\u5b9a\u7fa9\u5c01\u5305\u7684\u958b\u59cb\u548c\u7d50\u675f\uff0c\u4ee5\u4fbf\u63a5\u6536 UART \u77e5\u9053\u4f55\u6642\u958b\u59cb\u8b80\u53d6\u9019\u4e9b\u4f4d\u5143\u3002\u7576\u63a5\u6536 UART \u5075\u6e2c\u5230\u8d77\u59cb\u4f4d\u5143\u6642\uff0c\u5b83\u958b\u59cb\u4ee5\u7a31\u70ba\u6ce2\u7279\u7387\u7684\u7279\u5b9a\u983b\u7387\u8b80\u53d6\u50b3\u5165\u4f4d\u5143\u3002\u6ce2\u7279\u7387\u662f\u8cc7\u6599\u50b3\u8f38\u901f\u5ea6\u7684\u91cf\u6e2c\uff0c\u4ee5\u6bcf\u79d2\u4f4d\u6578 (bps) \u8868\u793a\u3002<\/p>

\u5169\u500b UART \u5fc5\u9808\u4ee5\u5927\u81f4\u76f8\u540c\u7684\u6ce2\u7279\u7387\u904b\u4f5c\u3002\u5728\u4f4d\u5143\u6642\u5e8f\u76f8\u5dee\u592a\u9060\u4e4b\u524d\uff0c\u767c\u9001\u548c\u63a5\u6536 UART \u4e4b\u9593\u7684\u6ce2\u7279\u7387\u53ea\u80fd\u76f8\u5dee\u7d04 3%\u3002\u5169\u500b UART \u9084\u5fc5\u9808\u914d\u7f6e\u70ba\u767c\u9001\u548c\u63a5\u6536\u76f8\u540c\u7684\u8cc7\u6599\u5305\u7d50\u69cb\u3002<\/p>

ESP32 \u4e32\u53e3\u63a5\u8173\u6392\u5217<\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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ESP32 Hardware Serial2 Arduino Example Code<\/h3>
\/*\n * There are three serial ports on the ESP known as U0UXD, U1UXD and U2UXD.\n * \n * U0UXD is used to communicate with the ESP32 for programming and during reset\/boot.\n * U1UXD is unused and can be used for your projects. Some boards use this port for SPI Flash access though\n * U2UXD is unused and can be used for your projects.\n * \n*\/\n\n#define RXD2 16\n#define TXD2 17\n\nvoid setup() {\n  \/\/ Note the format for setting a serial port is as follows: Serial2.begin(baud-rate, protocol, RX pin, TX pin);\n  Serial.begin(115200);\n  \/\/Serial1.begin(9600, SERIAL_8N1, RXD2, TXD2);\n  Serial2.begin(9600, SERIAL_8N1, RXD2, TXD2);\n  Serial.println(\"Serial Txd is on pin: \"+String(TX));\n  Serial.println(\"Serial Rxd is on pin: \"+String(RX));\n}\n\nvoid loop() { \/\/Choose Serial1 or Serial2 as required\n  while (Serial2.available()) {\n    Serial.print(char(Serial2.read()));\n  }\n}\n<\/pre>
This program reads data from serial2 and sends to serial0 i.e. programming serial. Multiple serial is useful when using GPS and GSM systems together.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"
https:\/\/circuits4you.com\/2018\/12\/3...<\/p>\n","protected":false},"author":1,"featured_media":578,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-574","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arduino"],"yoast_head":"\r\nESP32 \u65b0\u589e\u786c\u9ad4\u5e8f\u5217\u4e32\u53e3 2 \u7bc4\u4f8b - Richard Studio \u7406\u67e5\u5de5\u4f5c\u5ba4<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/3dok.biz\/wordpress\/?p=574\" \/>\r\n<meta property=\"og:locale\" content=\"zh_TW\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"ESP32 \u65b0\u589e\u786c\u9ad4\u5e8f\u5217\u4e32\u53e3 2 \u7bc4\u4f8b - Richard Studio \u7406\u67e5\u5de5\u4f5c\u5ba4\" \/>\r\n<meta property=\"og:description\" content=\"https:\/\/circuits4you.com\/2018\/12\/3...\" \/>\r\n<meta property=\"og:url\" content=\"https:\/\/3dok.biz\/wordpress\/?p=574\" \/>\r\n<meta property=\"og:site_name\" content=\"Richard Studio \u7406\u67e5\u5de5\u4f5c\u5ba4\" \/>\r\n<meta property=\"article:published_time\" content=\"2024-04-01T04:54:51+00:00\" \/>\r\n<meta property=\"article:modified_time\" content=\"2024-04-01T05:03:14+00:00\" \/>\r\n<meta property=\"og:image\" content=\"http:\/\/3dok.biz\/wordpress\/wp-content\/uploads\/2024\/04\/\u64f7\u53d6423.jpg\" \/>\r\n\t<meta property=\"og:image:width\" content=\"1258\" \/>\r\n\t<meta property=\"og:image:height\" content=\"791\" \/>\r\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\r\n<meta name=\"author\" content=\"Richard\" \/>\r\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\r\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Richard\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9810\u4f30\u95b1\u8b80\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\u9418\" \/>\r\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/3dok.biz\/wordpress\/?p=574#article\",\"isPartOf\":{\"@id\":\"https:\/\/3dok.biz\/wordpress\/?p=574\"},\"author\":{\"name\":\"Richard\",\"@id\":\"https:\/\/3dok.biz\/wordpress\/#\/schema\/person\/5e54f3d9faf01d51effe528b60b81ab2\"},\"headline\":\"ESP32 \u65b0\u589e\u786c\u9ad4\u5e8f\u5217\u4e32\u53e3 2 \u7bc4\u4f8b\",\"datePublished\":\"2024-04-01T04:54:51+00:00\",\"dateModified\":\"2024-04-01T05:03:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/3dok.biz\/wordpress\/?p=574\"},\"wordCount\":97,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/3dok.biz\/wordpress\/#organization\"},\"image\":{\"@id\":\"https:\/\/3dok.biz\/wordpress\/?p=574#primaryimage\"},\"thumbnailUrl\":\"https:\/\/3dok.biz\/wordpress\/wp-content\/uploads\/2024\/04\/\u64f7\u53d6423.jpg\",\"articleSection\":[\"Arduino\"],\"inLanguage\":\"zh-TW\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/3dok.biz\/wordpress\/?p=574#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/3dok.biz\/wordpress\/?p=574\",\"url\":\"https:\/\/3dok.biz\/wordpress\/?p=574\",\"name\":\"ESP32 \u65b0\u589e\u786c\u9ad4\u5e8f\u5217\u4e32\u53e3 2 \u7bc4\u4f8b - 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