UI/UX & HMI Development

Who Is This Service For?

• Medical Device Manufacturers needing a clear, safety-critical interface for patient monitors or infusion pumps (IEC 62366 compliant).
• Industrial OEMs upgrading legacy "button-and-light" panels to modern, multi-touch control screens.
• Consumer Electronics Startups building smart home hubs, kitchen appliances, or wearables where the UX is the product.
• Automotive Suppliers developing digital clusters, infotainment systems, or EV charging stations.

We build HMIs on the industry's leading silicon and software stacks:

MPU Platforms (Linux/Android):

• Qt / Qt Quick (QML): For rich, fluid, 60FPS interfaces on NXP i.MX, ST STM32MP1, and Rockchip.
• Flutter on Embedded: For modern, cross-platform development on Linux.
• Electron / Web Technologies: For kiosk-style devices with powerful CPUs.

• Generative AI (The UI Architect): Our GenAI tools can take a wireframe or a text description (e.g., "Medical ventilator screen with 3 waveforms and alarm status") and auto-generate the initial Qt/QML or LVGL code structure. It creates the boilerplate for widgets, layouts, and state machines, saving weeks of manual coding.
• Machine Learning (The Performance Tuner): We use ML to analyze rendering performance. We feed the UI code into a simulator that predicts frame rates (FPS) and RAM usage on your specific target hardware. It flags "expensive" effects (like Gaussian blur or real-time 3D) that will cause stuttering before you compile, allowing us to optimize early.

The Tangible Payoff:

• Superior Responsiveness: Hardware-aware optimization ensures consistent 60FPS performance and <100ms touch latency.
• Accelerated Timelines: Auto-generating UI code from design files (Figma-to-Code) reduces the implementation phase by 40-50%.
• Resource Efficiency: Expert memory management allows us to fit rich graphical interfaces into 50% less RAM than standard implementations, saving BOM cost.

Case Study 2: The "Instant-On" EV Battery Charger

Problem: A manufacturer of portable EV chargers needed a premium 4.3-inch display interface. The catch: it had to run on a low-cost microcontroller (STM32G0) to keep the BOM low, but users expected smartphone-like smoothness.
Process: We used TouchGFX on a bare-metal architecture. We utilized the STM32's Chrom-ART Accelerator (DMA2D) to offload graphical blending from the CPU. We implemented partial frame-buffering to save RAM.
Result: The UI was stunningly fluid and responsive, despite running on a $2 MCU. Crucially, the screen turned on and showed the "Charging Status" instantly (<100ms) after being plugged in, a critical user expectation for power devices.

Case Study 3: The Complex Medical Analyzer

Problem: A medical startup was building a blood analyzer. The UI needed to display real-time, high-speed graphs of sensor data while simultaneously running a complex analysis algorithm. The existing UI (built in Python/Tkinter) froze every time a test ran.
Process: We re-architected the system using Qt/C++ on an NXP i.MX 8. We separated the UI thread from the analysis thread. We used Qt Charts with OpenGL acceleration to render the heavy data visualization on the GPU, leaving the CPU free for the medical algorithm. We implemented a strict IEC 62304 compliant software development process.
Result: The analyzer could run tests and display smooth, real-time graphs simultaneously without a single stutter. The device passed FDA 510(k) clearance on the first attempt.

We engage with clients at any stage:

• As a "UX Design" Partner:
  You have the hardware, but your interface looks like it was designed by an engineer (because it was). We bring in our UI/UX Designers to create a modern, intuitive design system (Figma) that aligns with your brand and improves usability.
• As a "UI Implementation" Specialist:
  You have a beautiful design from a design agency, but your engineering team can't make it run fast on the hardware. We take the Figma files and implement pixel-perfect code (Qt/LVGL) that runs efficiently on your target chip. We use architectures like Model-View-Controller (MVC) or MVVM to cleanly separate your backend logic from the UI visualization, ensuring code stability and easier testing.
• As an Integrated End-to-End Solution:
  This is the gold standard. We design the Hardware
  , write the Board Support Package
  , and build the HMI
  together. We ensure the display interface (MIPI-DSI/LVDS) matches the screen, the touch controller interrupt is wired correctly for low latency, and the memory bandwidth is sufficient for the graphics. This holistic approach prevents the "laggy UI" problem from day one.

This is a critical strategic decision. The alternative to professional HMI development is often "Engineer Art" or mismatched web tech.

• The "Engineer Art" Trap: You let your firmware engineers design the UI. They use default grey buttons, tiny fonts, and confusing menu structures. The product works, but it feels "cheap" and "old." In a competitive market, UX is a differentiator. A bad UI makes a premium product feel like a budget one.
• The "Web Tech" Trap: You hire web developers to build your embedded UI because "they know JavaScript." They build a heavy React app that requires a powerful CPU and 2GB of RAM. You are forced to use an expensive processor just to run the UI, destroying your margins. Or worse, you ship it on cheap hardware, and it is painfully slow.
• The "Memory Leak" Trap: Poorly written GUI code is a primary source of memory leaks. In a device that runs 24/7 (like a medical monitor), a tiny leak will crash the device once a week. We use tools like Valgrind and deep profiling to ensure zero-leak stability.

The Expert Partner Solution: We balance Aesthetics with Physics. We design interfaces that are beautiful and efficient. We know how to squeeze every drop of performance out of the hardware to deliver a premium experience without blowing the BOM cost.

The "Finger Sized" Problem: On a phone, you have a high-res retina screen and delicate touches. On a factory floor, the operator has greasy, thick safety gloves. Tiny "hamburger menus" and delicate swipe gestures are impossible. We design large, high-contrast touch targets with explicit boundaries that work with gloves and imperfect touches.

Environmental Visibility: An iPad screen washes out in direct sunlight. A medical device must be readable under harsh OR lights. We select high-brightness (1000+ nits) displays and design high-contrast UI themes (Black on Yellow, White on Blue) that remain legible in critical conditions.

Safety & Workflow Priorities: A web app hides errors. An embedded HMI must show them. We design for Safety Critical UX:

• Quick Abort: A large, always-visible "Emergency Stop" or "Cancel" button on every screen.
• Process Visibility: Clear, unmissable progress bars and status indicators so the operator knows exactly what the machine is doing from 10 feet away.
• Error Logs: Accessible, readable logs for field technicians, not just cryptic error codes.

An Industrial HMI designer doesn't just design "screens"; they design situational awareness. Their day-to-day work is fundamentally different from a web designer's:

• Alarm Rationalization: They categorize hundreds of error codes to prevent "Alarm Fatigue." They decide which error needs a flashing red strobe and which is just a log entry, ensuring the operator focuses on real problems.
• Tag Database Mapping: Instead of clean JSON APIs, they map thousands of cryptic PLC memory tags (e.g., Modbus_40001) to human-readable UI elements (e.g., "Tank Level"). This requires deep understanding of the machine's data structure.
• State Machine Modeling: They design the UI based on the machine's state (Idle, Running, Faulted, Maintenance), not the user's navigation. A "Start" button must be disabled if a safety sensor is active.
• Human Factors Engineering (HFE): For medical/automotive, they write detailed HFE reports (IEC 62366) to prove that a user cannot make a critical error (like accidentally stopping a pump) due to bad UI design.

Phase 1 (UX Research & Wireframing): We define the user journey. Who is the user? (e.g., A gloved factory worker needs large buttons; a consumer needs gesture controls). We create low-fidelity wireframes to map the navigation flow.
Phase 2 (UI Design & Prototyping): Our designers create the visual style (colors, typography, icons). We build an interactive Clickable Prototype (in Figma) so you can test the "feel" of the flow before we write code.
Phase 3 (Technical Architecture): We select the software stack (Qt vs. LVGL) and the hardware platform. We define the resource budget (RAM, Flash, CPU usage).
Phase 4 (Implementation & Optimization): We write the code. We implement the screens, bind the data to the backend logic (using Model-View-ViewModel (MVVM) patterns), and optimize rendering performance.
Phase 5 (Integration & Validation): We deploy to the real hardware. We test for responsiveness, touch accuracy, daylight readability, and long-term stability. We perform usability testing with real users to ensure the interface is intuitive.

 What is MVC/MVVM and why do I need it for my HMI? 
Model-View-Controller (MVC) and Model-View-ViewModel (MVVM) are architectural patterns that separate your UI code (the look) from your backend logic (the data). This is critical for embedded systems. It ensures that if the UI crashes or changes, your core machine logic (the safety loop) keeps running. It also allows designers to iterate on the UI without breaking the underlying C/C++ code.

Qt is expensive. Do I have to pay licensing fees?
Not necessarily. Qt has a commercial license (paid) and an Open Source (LGPL) license (free). For many devices, you can legally use the Open Source version for free, provided you comply with the LGPL terms (dynamic linking, allowing user replacement). We are experts in Qt licensing and can advise you on the best path. If you need a completely free, permissive license, we recommend LVGL (MIT License) or Slint.

Can you update the UI over the air (OTA)?
Yes. We separate the UI application from the OS. This allows us to push updates to the interface (new features, bug fixes, re-branding) remotely using our DevOps for Embedded Systems OTA pipelines, without needing to re-flash the entire device.

How do you handle "Gloved Touch" or "Wet Touch"?
This is a hardware/driver tuning issue. We select Capacitive Touch Controllers that support these features (like those from Goodix or FocalTech). We then tune the driver sensitivity settings in theBSP & Device Driver Development phase to distinguish between a finger, a glove, and a water droplet.

What about boot time? My user expects the screen on instantly.
We specialize in Fast Boot. We can optimize a Linux system to show a "splash screen" in <1 second and a fully interactive UI in <3-5 seconds. For MCUs (RTOS), we achieve "instant on" (<0.5s) performance.

Can you build a UI that supports multiple languages?
Yes. We architect the software with Internationalization (i18n) from day one. All text strings are stored in external translation files. This allows you to add support for new languages (including complex scripts like Chinese or Arabic) by simply adding a new text file, without changing the code.

Do you do the graphic design, or do I need to provide it?
We can do both. We have in-house UI Designers who specialize in embedded interfaces. However, if you have your own design team, we are happy to take their Figma/Adobe XD files and implement them pixel-perfectly.

How do you ensure the UI doesn't freeze?
We use a multi-threaded architecture. The UI rendering happens on the main thread, while heavy "blocking" tasks (like reading a sensor, network requests, or database queries) are offloaded to background threads. This ensures the UI remains responsive to touch 100% of the time, even if the backend is busy.

Can you integrate 3D graphics?
Yes. On capable hardware (like i.MX 8 or STM32MP1), we can use OpenGL ES to render 3D models, animations, and data visualizations. This is increasingly popular in automotive clusters and high-end medical displays.