{"id":44791,"date":"2025-05-19T10:00:57","date_gmt":"2025-05-19T16:00:57","guid":{"rendered":"https:\/\/www.logicbus.com.mx\/blog\/?p=44791"},"modified":"2026-02-03T11:12:54","modified_gmt":"2026-02-03T17:12:54","slug":"modbus-rtu-para-plcs-basados-en-arduino-esp32","status":"publish","type":"post","link":"https:\/\/www.logicbus.com.mx\/blog\/modbus-rtu-para-plcs-basados-en-arduino-esp32\/","title":{"rendered":"Modbus RTU para PLCs basados en Arduino \/ ESP32"},"content":{"rendered":"<h2 style=\"text-align: center;\"><strong>Aprende c\u00f3mo trabajar con Modbus RTU en PLCs basados en Arduino y ESP32<\/strong><\/h2>\n<h2><strong>Introducci\u00f3n<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Modbus RTU es un protocolo de comunicaci\u00f3n ampliamente utilizado en la automatizaci\u00f3n industrial, conocido por su simplicidad, confiabilidad y capacidad para operar a largas distancias. Facilita la comunicaci\u00f3n entre dispositivos como Controladores L\u00f3gicos Programables (PLCs), sensores y actuadores. En esta publicaci\u00f3n de blog, exploraremos c\u00f3mo implementar la comunicaci\u00f3n Modbus RTU utilizando PLCs <a href=\"https:\/\/tienda.logicbus.com.mx\/industrial-shields\">Industrial Shields<\/a> basados en Arduino y ESP32, mostrando configuraciones tanto maestras como esclavas.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ya sea que est\u00e9s buscando establecer comunicaci\u00f3n entre dos PLCs o conectar tu PLC a otros dispositivos compatibles con Modbus, este tutorial proporciona una gu\u00eda completa tanto para la implementaci\u00f3n de hardware como de software. Aprender\u00e1s sobre los componentes necesarios, c\u00f3mo cablear y configurar el hardware, y c\u00f3mo programar la funcionalidad Modbus utilizando el IDE de Arduino y la biblioteca Modbus.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Al final de este tutorial, podr\u00e1s configurar un sistema de comunicaci\u00f3n Modbus RTU robusto con facilidad, aprovechando los vers\u00e1tiles PLCs <a href=\"https:\/\/tienda.logicbus.com.mx\/industrial-shields\">Industrial Shields<\/a> para tus proyectos de automatizaci\u00f3n.<\/span><\/p>\n<h2><strong>Requisitos de Hardware <img decoding=\"async\" class=\"size-medium wp-image-44792 alignright\" src=\"https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2025\/05\/esp32-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2025\/05\/esp32-300x300.jpg 300w, https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2025\/05\/esp32-150x150.jpg 150w, https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2025\/05\/esp32-24x24.jpg 24w, https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2025\/05\/esp32-48x48.jpg 48w, https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2025\/05\/esp32-96x96.jpg 96w, https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2025\/05\/esp32.jpg 500w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/strong><\/h2>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Controlador L\u00f3gico Programable basado en <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-Arduino_c_7944.html\"><span style=\"font-weight: 400;\">Arduino<\/span><\/a><span style=\"font-weight: 400;\"> \/ <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-ESP32_c_7952.html\"><span style=\"font-weight: 400;\">ESP32<\/span><\/a><span style=\"font-weight: 400;\"> de <a href=\"https:\/\/tienda.logicbus.com.mx\/industrial-shields\">Industrial Shields<\/a> (fungir\u00e1 como Modbus Maestro).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Controlador L\u00f3gico Programable basado en <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-Arduino_c_7944.html\"><span style=\"font-weight: 400;\">Arduino<\/span><\/a><span style=\"font-weight: 400;\"> \/ <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-ESP32_c_7952.html\"><span style=\"font-weight: 400;\">ESP32<\/span><\/a><span style=\"font-weight: 400;\"> de <a href=\"https:\/\/tienda.logicbus.com.mx\/industrial-shields\">Industrial Shields<\/a> (fungir\u00e1 como Modbus Maestro).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><a href=\"https:\/\/tienda.logicbus.com.mx\/automatizacion-y-control-de-procesos-fuentes-de-poder-reign-powermontaje-riel-dinpared\"><span style=\"font-weight: 400;\">Fuente de voltaje de 12 \u00f3 24 VCD<\/span><\/a><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cable tipo USB B \u00f3 Micro USB-B: Para programar los PLCS <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-Arduino_c_7944.html\"><span style=\"font-weight: 400;\">Arduino<\/span><\/a><span style=\"font-weight: 400;\"> \/ <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-ESP32_c_7952.html\"><span style=\"font-weight: 400;\">ESP32<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">2 cables de par trenzado, para conectar a puertos RS-485.<\/span><\/li>\n<\/ol>\n<h2><strong>Configuraci\u00f3n del Software<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Antes de sumergirte en el c\u00f3digo, aseg\u00farate de tener:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Arduino IDE<\/strong>: software para programar PLCs <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-Arduino_c_7944.html\"><span style=\"font-weight: 400;\">Arduino<\/span><\/a><span style=\"font-weight: 400;\"> \/ <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-ESP32_c_7952.html\"><span style=\"font-weight: 400;\">ESP32<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Librer\u00edas de Industrial Shields<\/strong>:<\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Descarga la librer\u00eda desde <\/span><a href=\"http:\/\/apps.industrialshields.com\/main\/arduino\/boards\/package_industrialshields_index.json\"><span style=\"font-weight: 400;\">este enlace<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Descompr\u00edmela y a\u00f1\u00e1dela a tu Arduino IDE.<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Librer\u00eda Modbus<\/strong>: descargable desde Arduino IDE.<\/span><\/li>\n<\/ol>\n<h2><strong>Implementaci\u00f3n (configuraci\u00f3n de Hardware)<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Primero, alimenta el PLC entre 12 y 24V, conecta los cables a trav\u00e9s de RS-485 y configura los interruptores correspondientes de tu PLC. Aseg\u00farate de que todas tus configuraciones est\u00e9n bien.<\/span><\/p>\n<h2><strong>Implementaci\u00f3n (configuraci\u00f3n de Software)<\/strong><\/h2>\n<h3><span style=\"font-weight: 400;\">Para el PLC Maestro<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Para programar el PLC Maestro Modbus, sigue estos pasos:<\/span><\/p>\n<ol>\n<li><span style=\"font-weight: 400;\"> Navegue en File &gt; Examples &gt; Modbus or File &gt; Examples &gt; Tools40 &gt; Modbus, y seleccione uno de los ejemplos Modbus RTU. Estos ejemplos demuestran varias funcionalidades de Modbus.<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> Selecciona tu Tablero y Modelo de acuerdo a tu PLC:<\/span><\/li>\n<\/ol>\n<p><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-Arduino_c_7944.html\"><span style=\"font-weight: 400;\">Familia Arduino<\/span><\/a><span style=\"font-weight: 400;\"> (excepto IS.AB20AN.HF+ y IS.AB20REL.HF+): Tools &gt; Board &gt; Industrial Shields AVR Boards &gt; M-Duino [Extension] family y Tools &gt; Model &gt; M-Duino [Module]<\/span><\/p>\n<p><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-Arduino_c_7944.html\"><span style=\"font-weight: 400;\">Familia Arduino<\/span><\/a><span style=\"font-weight: 400;\"> (IS.AB20AN.HF+ y <\/span><a href=\"http:\/\/is.ab20rel.hf\"><span style=\"font-weight: 400;\">IS.AB20REL.HF<\/span><\/a><span style=\"font-weight: 400;\">+): Tools &gt; Board &gt; Industrial Shields AVR Boards &gt; Ardbox [Extension] family y Tools &gt; Model &gt; Ardbox [Module] HF+ w\/HW RS-485<\/span><\/p>\n<p><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-ESP32_c_7952.html\"><span style=\"font-weight: 400;\">Familia ESP32<\/span><\/a><span style=\"font-weight: 400;\"> (excepto 0130000Z0001): Tools &gt; Board &gt; Industrial Shields ESP32 Boards &gt; ESP32 PLC Family y Tools &gt; Model &gt; ESP32 PLC [Module]<\/span><\/p>\n<p><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-ESP32_c_7952.html\"><span style=\"font-weight: 400;\">Familia ESP32<\/span><\/a><span style=\"font-weight: 400;\"> (0130000Z0001): Tools &gt; Board &gt; Industrial Shields ESP32 Boards &gt; 14 IOS PLC Family<\/span><\/p>\n<ol start=\"3\">\n<li><span style=\"font-weight: 400;\"> Aseg\u00farese de que las siguientes configuraciones sean las mismas que en el dispositivo esclavo:<\/span><\/li>\n<\/ol>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Baudios: Velocidad de comunicaci\u00f3n (ej., 9600, 19200).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Modo D\u00faplex: Entre half-duplex o full-duplex, dependiendo de su comunicaci\u00f3n.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ajustes de comunicaci\u00f3n serial: Por default SERIAL_8E1 (8 bits de datos, paridad non, 1 bit de paro).<\/span><\/li>\n<\/ul>\n<ol start=\"4\">\n<li><span style=\"font-weight: 400;\"> Por \u00faltimo, cargue el sketch en: Sketch &gt; Upload.<\/span><\/li>\n<\/ol>\n<h3><strong>Para el PLC Esclavo<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Para programar el PLC Esclavo Modbus, sigue estos pasos:<\/span><\/p>\n<ol>\n<li><span style=\"font-weight: 400;\"> Navegue en File &gt; Examples &gt; Modbus or File &gt; Examples &gt; Tools40 &gt; Modbus, y selecciona el c\u00f3digo de los ejemplos Modbus RTU.<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> Selecciona tu Tablero y Modelo de acuerdo a tu PLC con la misma configuraci\u00f3n que el Maestro.<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> Aseg\u00farate de que la velocidad de baudios, el modo d\u00faplex y la configuraci\u00f3n de comunicaci\u00f3n serial sean los mismos que en el dispositivo maestro.<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> El c\u00f3digo de los ejemplos Modbus RTU Esclavos es para usarse con el PLC <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/ISMDuino21_p_38038.html\"><span style=\"font-weight: 400;\">IS.MDuino.21+<\/span><\/a><span style=\"font-weight: 400;\">, esto significa que la asignaci\u00f3n de pines deber\u00e1 modificarse en caso de utilizar otro PLC.<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> Por \u00faltimo, cargue el sketch en: Sketch &gt; Upload.<\/span><\/li>\n<\/ol>\n<h2><strong>Conclusi\u00f3n<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Con esta configuraci\u00f3n, tu PLC <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-Arduino_c_7944.html\"><span style=\"font-weight: 400;\">Arduino<\/span><\/a><span style=\"font-weight: 400;\"> \/ <\/span><a href=\"https:\/\/tienda.logicbus.com.mx\/PLC-ESP32_c_7952.html\"><span style=\"font-weight: 400;\">ESP32<\/span><\/a><span style=\"font-weight: 400;\"> est\u00e1 ahora conectado a una red Modbus RTU, transmitiendo datos por RS-485. Esta es una base s\u00f3lida para aplicaciones industriales, como la monitorizaci\u00f3n de sensores, el control mediante HMIs y la transmisi\u00f3n de datos.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3 style=\"text-align: center;\">Cont\u00e1ctanos<\/h3>\n<h3 style=\"text-align: center;\"><a href=\"https:\/\/tienda.logicbus.com.mx\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"card-review alignnone\" title=\"Tienda en linea\" src=\"https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2022\/11\/tienda.png \" alt=\"\" width=\"102\" height=\"102\" \/><\/a><a href=\"https:\/\/www.logicbus.com.mx\/\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"card-review alignnone\" title=\"Logicbus\" src=\"https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2022\/11\/www.png \" alt=\"\" width=\"104\" height=\"104\" \/><\/a><a href=\"https:\/\/www.logicbus.com.mx\/soporte\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"card-review alignnone\" title=\"Soporte\" src=\"https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2022\/11\/soporte.png \" alt=\"\" width=\"106\" height=\"106\" \/><\/a><a href=\"https:\/\/api.whatsapp.com\/send?phone=525554316718&amp;text=Hola%20Logicbus,me%20gustar%C3%ADa%20solicitar%20informaci%C3%B3n\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"card-review alignnone\" title=\"Whatsapp\" src=\"https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2022\/11\/wa.png \" alt=\"\" width=\"103\" height=\"103\" \/><\/a><a href=\"https:\/\/www.logicbus.com.mx\/contacto\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"card-review alignnone\" title=\"Contacto\" src=\"https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2022\/11\/contacto.png \" alt=\"\" width=\"115\" height=\"115\" \/><\/a><a href=\"https:\/\/www.logicbus.com.mx\/soluciones-en-la-industria-logicbus.php\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"card-review alignnone\" title=\"Soluciones\" src=\"https:\/\/www.logicbus.com.mx\/blog\/wp-content\/uploads\/2022\/11\/soluciones.png \" alt=\"\" width=\"106\" height=\"106\" \/><\/a><\/h3>\n<p style=\"text-align: center;\"><a href=\"mailto:ventas@logicbus.com\">ventas@logicbus.com<\/a>\u00a0 \u00a0 \u00a0 |\u00a0 \u00a0 \u00a0\u00a0<a href=\"mailto:soporte@logicbus.com\">soporte@logicbus.com<\/a>\u00a0 \u00a0 \u00a0 |\u00a0 \u00a0 \u00a0\u00a0<a href=\"https:\/\/api.whatsapp.com\/send?phone=525554316718&amp;text=Hola%20Logicbus,me%20gustar%C3%ADa%20solicitar%20informaci%C3%B3n\">55-5431-67-18<\/a>\u00a0 \u00a0 |\u00a0 \u00a0 \u00a0\u00a0 <a href=\"https:\/\/tawk.to\/chat\/5ca674ff1de11b6e3b06f73d\/default\">Iniciar conversaci\u00f3n<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aprende c\u00f3mo trabajar con Modbus RTU en PLCs basados en Arduino y ESP32 Introducci\u00f3n Modbus RTU es un protocolo de comunicaci\u00f3n ampliamente utilizado en la automatizaci\u00f3n industrial, conocido por su simplicidad, confiabilidad y capacidad para operar a largas distancias. Facilita la comunicaci\u00f3n entre dispositivos como Controladores L\u00f3gicos Programables (PLCs), sensores y actuadores. En esta publicaci\u00f3n [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":44794,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5767],"tags":[5986,16],"class_list":["post-44791","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-plcs-y-convertidores-de-protocolo","tag-industrial-shields","tag-plcs"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Modbus RTU para PLCs basados en Arduino \/ ESP32 &#8211; Blog Logicbus<\/title>\n<meta name=\"description\" content=\"Modbus RTU es un protocolo de comunicaci\u00f3n ampliamente utilizado en la automatizaci\u00f3n industrial, conocido por su simplicidad y confiabilidad\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.logicbus.com.mx\/blog\/modbus-rtu-para-plcs-basados-en-arduino-esp32\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Modbus RTU para PLCs basados en Arduino \/ ESP32 &#8211; 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