Ambulance HMI
A modern vehicle dashboard designed for emergency vehicles such as ambulances and fire trucks. Built with LVGL, it runs on performance-critical embedded hardware while still delivering a sleek, polished, and high-end user interface.
About the demo
DOMAIN
Medical / Automotive / Embedded HMITECH STACK
LVGL · C · CMake · SDL · Bare-metalTARGET HARDWARE
STM32H757XIH6-based Riverdi 10.1" STM32 Embedded DisplaySCOPE
Embedded GUI Development | UX/UI DesignAmbulance HMI is a vehicle dashboard our team designed and developed in-house for emergency vehicles. Built entirely in C with LVGL, it delivers a responsive interface on performance-critical bare-metal hardware with just 2 MB of Flash and 1 MB of RAM.
Engineering challenge
- Working within strict hardware limitations of just 2 MB Flash and 1 MB RAM
- Preventing memory corruption and memory exhaustion in C
- Carefully managing assets, fonts, widgets, and memory allocations
- Controlling animation lifecycles to avoid memory leaks and UI instability
System Key Features
The entire interface is built in pure C, with LVGL as the graphics library. No C++, no heavy framework, and no additional runtime-just lightweight, efficient code running close to the hardware.
Running directly on the STM32H757XIH6 with no operating system or scheduler, the application uses a streamlined LVGL loop for predictable, low-overhead performance. Despite tight hardware limits of just 2 MB Flash and 1 MB RAM, it delivers a smooth 30 FPS interface through carefully optimized assets, fonts, and widgets - showing that a polished modern UI can run efficiently on resource-constrained hardware.
Designed for a 10.1" Riverdi STM32 Embedded Display powered by the STM32H757XIH6. The high-resolution TFT platform is built for demanding indoor and outdoor applications, making it a strong fit for real-world embedded systems.
Supported boards
- Tested and verified on the STM32 Embedded Display, running on STM32H757XIH6.
- Portable to any LVGL-supported target.
- Whole STM32H7 family
Partnership with LVGL
Somco Software is an official LVGL partner. In our projects, we leverage LVGL's lightweight graphics technology and Somco Software's experience in embedded engineering and UX/UI design. The ambulance HMI panel is only one of the great examples.
Custom Figma design
The complete Figma design for this project was created in-house by the Somco Software team. From the overall visual direction to individual interface components, every element was designed by us with usability, consistency, and the target platform in mind.
We also offer UI/UX design as a service - Somco can create a complete, implementation-ready Figma design tailored to your product and hardware.
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Adam Sowa
Chief Technology Officer
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