{"id":502,"date":"2025-04-25T21:01:24","date_gmt":"2025-04-25T13:01:24","guid":{"rendered":"https:\/\/www.flywing-tech.com\/blog\/rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display\/"},"modified":"2025-06-22T21:45:15","modified_gmt":"2025-06-22T13:45:15","slug":"rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display","status":"publish","type":"post","link":"https:\/\/www.flywing-tech.com\/blog\/rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display\/","title":{"rendered":"How Can a Rotary Encoder Project Offer Customized UI for Any MCU, MPU, or Display?"},"content":{"rendered":"<div class=\"fsc_text\"><p class=\"ds-markdown-paragraph\">A\u00a0<strong>rotary encoder project<\/strong>\u00a0can provide a\u00a0<strong>customized UI<\/strong>\u00a0for any\u00a0<strong>MCU, MPU, or display<\/strong>\u00a0by leveraging flexible firmware libraries, adaptable hardware interfaces, and modular software design. This allows seamless integration with various microcontrollers (MCUs), microprocessors (MPUs), and display technologies, enabling developers to tailor user interfaces for industrial, automotive, or consumer applications.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\r\n<div class=\"ez-toc-title-container\">\r\n<h2 class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/h2>\r\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #023a85;color:#023a85\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #023a85;color:#023a85\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\r\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.flywing-tech.com\/blog\/rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display\/#how_does_a_rotary_encoder_interface_with_different_mcus_and_mpus\" >How Does a Rotary Encoder Interface with Different MCUs and MPUs?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.flywing-tech.com\/blog\/rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display\/#what_are_the_best_display_options_for_rotary_encoder_projects\" >What Are the Best Display Options for Rotary Encoder Projects?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.flywing-tech.com\/blog\/rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display\/#how_to_customize_ui_logic_for_rotary_encoder_input\" >How to Customize UI Logic for Rotary Encoder Input?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.flywing-tech.com\/blog\/rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display\/#buying_tips\" >Buying Tips<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.flywing-tech.com\/blog\/rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display\/#electronic_components_expert_views\" >Electronic Components Expert Views<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.flywing-tech.com\/blog\/rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display\/#faq\" >FAQ<\/a><\/li><\/ul><\/nav><\/div>\r\n<h2><span class=\"ez-toc-section\" id=\"how_does_a_rotary_encoder_interface_with_different_mcus_and_mpus\"><\/span>How Does a Rotary Encoder Interface with Different MCUs and MPUs?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"ds-markdown-paragraph\">Rotary encoders connect to\u00a0<strong>MCUs<\/strong>\u00a0(e.g., STM32, ESP32) and\u00a0<strong>MPUs<\/strong>\u00a0(e.g., Raspberry Pi, BeagleBone) via GPIO, interrupts, or dedicated peripherals like QEI (Quadrature Encoder Interface). Key methods include:<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Polling<\/strong>: Simple but inefficient for high-speed encoders.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Interrupts<\/strong>: More responsive, ideal for real-time systems.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Hardware Decoders<\/strong>: Offload processing (e.g., STM32\u2019s TIMx, LPC55xx\u2019s CTIMER).<\/p>\n<\/li>\n<\/ul>\n<p class=\"ds-markdown-paragraph\">Chart:\u00a0<strong>MCU\/MPU Compatibility with Rotary Encoders<\/strong><\/p>\n<div class=\"markdown-table-wrapper\">\n<table>\n<thead>\n<tr>\n<th>Device<\/th>\n<th>Interface Method<\/th>\n<th>Max Frequency<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>STM32F4<\/strong><\/td>\n<td>TIMx QEI<\/td>\n<td>10 MHz<\/td>\n<\/tr>\n<tr>\n<td><strong>ESP32<\/strong><\/td>\n<td>GPIO + Interrupts<\/td>\n<td>1 MHz<\/td>\n<\/tr>\n<tr>\n<td><strong>Raspberry Pi<\/strong><\/td>\n<td>Software Decoding<\/td>\n<td>100 kHz<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"what_are_the_best_display_options_for_rotary_encoder_projects\"><\/span>What Are the Best Display Options for Rotary Encoder Projects?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"ds-markdown-paragraph\">A\u00a0<strong>rotary encoder project<\/strong>\u00a0pairs well with:<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>OLED Displays<\/strong>: Fast refresh rates, low power (e.g., SSD1306).<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>TFT LCDs<\/strong>: Color-rich, touch-compatible (e.g., ILI9341).<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>E-Paper<\/strong>: Energy-efficient for static UIs (e.g., Waveshare).<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"how_to_customize_ui_logic_for_rotary_encoder_input\"><\/span>How to Customize UI Logic for Rotary Encoder Input?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"ds-markdown-paragraph\">Custom UIs require:<\/p>\n<ol start=\"1\">\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Event Handling<\/strong>: Map encoder steps to menu navigation.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Debouncing<\/strong>: Filter noise via hardware (RC filters) or software (state machines).<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Modular Code<\/strong>: Use libraries like\u00a0<strong>Encoder<\/strong>\u00a0(Arduino) or\u00a0<strong>HAL<\/strong>\u00a0(STM32).<\/p>\n<\/li>\n<\/ol>\n<p class=\"ds-markdown-paragraph\">Chart:\u00a0<strong>Rotary Encoder UI Customization Workflow<\/strong><\/p>\n<div class=\"markdown-table-wrapper\">\n<table>\n<thead>\n<tr>\n<th>Step<\/th>\n<th>Tool\/Library<\/th>\n<th>Outcome<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Signal Read<\/strong><\/td>\n<td>Hardware Timer<\/td>\n<td>Raw pulse count<\/td>\n<\/tr>\n<tr>\n<td><strong>Debounce<\/strong><\/td>\n<td>Schmitt Trigger<\/td>\n<td>Clean transitions<\/td>\n<\/tr>\n<tr>\n<td><strong>UI Update<\/strong><\/td>\n<td>LVGL\/Embedded GUI<\/td>\n<td>Dynamic display<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"buying_tips\"><\/span>Buying Tips<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"ds-markdown-paragraph\">For a\u00a0<strong>rotary encoder project<\/strong>, prioritize:<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Encoder Type<\/strong>: Optical (high precision) vs. mechanical (durable).<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>MCU\/MPU Support<\/strong>: Ensure compatibility with QEI or interrupt pins.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Display Interface<\/strong>: SPI\/I2C for easy integration.<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>Supplier Reliability<\/strong>:\u00a0<strong>Fly-wing Technology<\/strong>\u00a0offers genuine encoders, MCUs, and displays at competitive prices, with global stock and traceable components.<\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"electronic_components_expert_views\"><\/span>Electronic Components Expert Views<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"ds-markdown-paragraph\"><em>&#8220;Rotary encoders bridge tactile input and digital control, but success hinges on choosing the right decoding method. Hardware QEI minimizes CPU load, while modular UI libraries like LVGL accelerate development.&#8221;<\/em>\u00a0\u2014 Dr. Lin Chen, Embedded Systems Engineer.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"faq\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"ds-markdown-paragraph\"><strong>Q: Can a rotary encoder work with any MCU?<\/strong><br \/>\nA: Yes, but performance varies. STM32\u2019s hardware QEI outperforms software decoding on basic MCUs.<\/p>\n<p class=\"ds-markdown-paragraph\"><strong>Q: What\u2019s the best display for low-power rotary encoder projects?<\/strong><br \/>\nA: OLEDs (e.g., SSD1306) balance power efficiency and responsiveness.<\/p>\n<p class=\"ds-markdown-paragraph\"><strong>Q: How to reduce rotary encoder noise?<\/strong><br \/>\nA: Use hardware debouncing (RC filters) or software algorithms (finite state machines).<\/p>\n<p style=\"text-align: start;\"><strong>Kickstarter project Rotary Encoder aims to bring touch screen rotary encoders to the DIY electronics community.<\/strong><\/p>\n<p style=\"text-align: start;\">When developing interactive hardware, especially in IoT and embedded systems, engineers implement a wide variety of input methods that range from traditional buttons and knobs to more modern touch sensors and touch panels.<\/p>\n<p style=\"text-align: start;\">As an alternative, companies have started to offer innovative crossovers between the tactile features of mechanical components and the interactive capabilities of multi-touch displays. One recent example comes from Rotary Encoder, an MCU\/MPU-based touchscreen rotary encoder launched as a Kickstarter project in last summer.<\/p>\n<p style=\"text-align: start;\"><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/file.flywing-tech.com\/res\/article\/2024072211054654695087f971632cf5f80b8ebb227347a15c911d.png\" alt=\"\" data-href=\"\" \/><\/p>\n<p style=\"text-align: center;\"><em>Rotary offers three different variations: Rotary HAT (left), Rotary ESP32 (center), and Rotary Pico W (right). Image (modified) used courtesy of Rotary and <\/em><span style=\"color: #ff7a45;\"><em>Kickstarter<\/em><\/span><\/p>\n<h5 style=\"text-align: center;\"><\/h5>\n<p style=\"text-align: start;\">\n<p style=\"text-align: start;\">In this article, we&#8217;ll take a look at the variants of this platform, its key features, and potential use cases for engineers using them in their projects.<\/p>\n<p style=\"text-align: start;\"><strong>The Hardware Behind Rotary<\/strong><\/p>\n<p style=\"text-align: start;\">Rotary Encoder is an open-source touchscreen rotary encoder component that can be <a href=\"https:\/\/www.flywing-tech.com\/blog\/stm32f103ret6-in-depth-analysis-and-application-exploration-of-a-high-performance-microcontroller\/\">embedded into projects<\/a> as a miniature, interactive, and tactile UI.<\/p>\n<p style=\"text-align: start;\">The base device includes a mechanical ring that rotates around a stationary 1.28-inch, 240 by 240-pixel circular touch LCD with a color depth of 24 bits. In addition, the device features an array of 32 RGB LEDs placed in a ring formation around its main assembly.<\/p>\n<p style=\"text-align: start;\">Rotary offers three distinct variants of its platform:<\/p>\n<ol>\n<li style=\"text-align: start;\"><strong>Rotary\u2014Pico W Powered<\/strong>, based on the Raspberry Pi Pico W<\/li>\n<li style=\"text-align: start;\"><strong>Rotary\u2014ESP32-S3 Powered<\/strong>, based on the ESP32-S3<\/li>\n<li style=\"text-align: start;\"><strong>Rotary\u2014Raspberry Pi HAT<\/strong>, intended for use with single-board computers like the Raspberry Pi<\/li>\n<\/ol>\n<p style=\"text-align: start;\">Alongside the display and rotary encoder assembly, the first two versions (around $77) feature an embedded development board soldered onto the device itself, while the HAT (around $52) features a block of Raspberry Pi breakout pins.<\/p>\n<p style=\"text-align: start;\">Rotary Pico W carries a standard RP2040 microcontroller board with a dual-core Arm Cortex M0+ processor clocked at a speed of 133 MHz with 264 kB of SRAM and 2 MB of flash memory. \u00a0Similarly, Rotary ESP carries an ESP32-S3 chip with a dual-core XTensa LX7 microcontroller running at 240 MHz with 384 KB of ROM and 512 KB of SRAM.<\/p>\n<p style=\"text-align: start;\">Both versions support Wi-Fi 802.11 and Bluetooth LE (low energy) and can be programmed directly via the USB interface. Users can also break out remaining GPIO pins for use with other components such as sensors, actuators, and peripherals.<\/p>\n<p style=\"text-align: start;\"><strong>Implementing Rotary<\/strong><\/p>\n<p style=\"text-align: start;\">According to the developer, this device is compatible with the most popular free and open-source embedded graphics library, LVGL. It also supports many IDEs and programming languages, such as Arduino and MicroPython, commonly used with the Pico and ESP development boards.<\/p>\n<p style=\"text-align: start;\">Through Rotary, engineers can create various types of graphical user interfaces by combining widgets, animations, buttons, sliders, and other data visualization elements along with the touch display and rotary encoder assembly. Other components can be integrated into their designs via the remaining GPIO ports.<\/p>\n<p style=\"text-align: start;\"><img decoding=\"async\" style=\"width: 100%;\" src=\"https:\/\/file.flywing-tech.com\/res\/article\/202407221106096944f1a0b7b72c589c4ffc5d7ee368aa4bdcf71.png\" alt=\"\" data-href=\"\" \/><\/p>\n<p style=\"text-align: center;\"><em>The rotary structure. Image (modified) used courtesy of Rotary and <\/em><span style=\"color: #ff7a45;\"><em>Kickstarter<\/em><\/span><\/p>\n<p style=\"text-align: start;\">\n<p style=\"text-align: start;\">Additionally, engineers can connect their Rotary systems to the internet or use them to build personalized networks thanks to the Wi-Fi and Bluetooth-enabled Pico W and ESP32 hardware and libraries. Doing so would allow Rotary to wirelessly control home automation appliances or be controlled by devices such as smartphones or wearables.<\/p>\n<p style=\"text-align: start;\">Created with the Internet of Things in mind, the Rotary platform can find potential applications in many systems ranging from wireless MIDI controllers and interactive programmable macro pads to wall-mounted HVAC remotes and smart window curtain controllers.<\/p>\n<p style=\"text-align: start;\"><strong>Lowering the Barrier to Entry<\/strong><\/p>\n<p style=\"text-align: start;\">In the past, developers have aimed similar products toward the enterprise market. Through this Kickstarter project, however, Rotary seems to be catering to the DIY engineering community, intending to capture a wider audience by embedding the most popular MCU platforms into its technology.<\/p>\n<p style=\"text-align: start;\">At the time of this article posting, Rotary has already surpassed its \uffe1500 goal by a huge mulitple, curently at \uffe113,504. The project is expected to be the subject of many interesting DIY projects. Rotary opened for shipments in September last year.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A\u00a0rotary encoder project\u00a0can provide a\u00a0customized UI\u00a0for any\u00a0MCU, MPU, or display\u00a0by leveraging flexible firmware libraries, adaptable hardware interfaces, and modular software design. This allows seamless integration with various microcontrollers (MCUs), microprocessors (MPUs), and display technologies, enabling developers to tailor user interfaces for industrial, automotive, or consumer applications. How Does a Rotary Encoder Interface with Different MCUs [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":222,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[166],"tags":[171,170,169,167,168],"class_list":["post-502","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-embedded-systems-design","tag-display-integration","tag-gpio","tag-mcu-interfacing","tag-rotary-encoders","tag-ui-customization"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>How Can a Rotary Encoder Project Offer Customized UI for Any MCU, MPU, or Display? - Fly-Wing<\/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:\/\/www.flywing-tech.com\/blog\/rotary-encoder-project-offers-customized-ui-for-any-mcu-mpu-or-display\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"How Can a Rotary Encoder Project Offer Customized UI for Any MCU, MPU, or Display? - Fly-Wing\" \/>\r\n<meta property=\"og:description\" content=\"A\u00a0rotary encoder project\u00a0can provide a\u00a0customized UI\u00a0for any\u00a0MCU, MPU, or display\u00a0by leveraging flexible firmware libraries, adaptable hardware interfaces, and modular software design. 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