UI Layout Patterns on Embedded Systems Development

Layout Strategies for Small Screens

Mon, 01 Jan 0001 00:00:00 +0000

Layout Strategies for Small Screens#

Designing for a 128x64 OLED or a 240x320 TFT is nothing like designing for a phone screen. Every pixel matters, text choices are constrained, and there’s no room for decorative padding. But small doesn’t mean primitive — with careful layout, these tiny screens can communicate a surprising amount of information clearly.

Information Hierarchy#

The first question for any small screen UI is: what needs to be visible right now? On a 128x64 display, roughly 4 lines of medium text fit or 8 lines of tiny text. That’s the entire information budget. Prioritize ruthlessly:

Menus & Navigation Patterns

Mon, 01 Jan 0001 00:00:00 +0000

Once an embedded display shows more than a single static value, navigation is needed — a way to access different screens, change settings, or trigger actions. The input devices on embedded projects (typically buttons and rotary encoders) are far more limited than a touchscreen, which makes the navigation design both more important and more constrained.

Rotary Encoder + Button#

The rotary encoder with an integrated push button is the most versatile input device for small-screen UIs. Rotation scrolls through options, and the button confirms a selection. This maps naturally to list menus: rotate to highlight an item, press to enter. For value editing, the same pattern works: press to start editing a parameter, rotate to change the value, press to confirm.

Data Visualization on MCUs

Mon, 01 Jan 0001 00:00:00 +0000

Data Visualization on MCUs#

Displaying raw numbers on a screen is useful, but visualizing data as charts, gauges, or graphs makes patterns immediately obvious. The challenge on MCUs is doing this with limited resolution, limited RAM (no floating-point-heavy chart libraries), and limited CPU time. The good news: even simple visualizations are surprisingly effective on small screens.

Sparklines#

A sparkline is a minimal line chart without axes or labels — just the data trend rendered as a thin line across a small area. It’s perfect for showing “what has this value been doing recently?” in a compact space. Implementation is straightforward: keep a circular buffer of N recent values (where N equals the pixel width of the sparkline), scale the values to the pixel height, and draw a line connecting adjacent points.

UI Layout Patterns on Embedded Systems Development

Layout Strategies for Small Screens

Layout Strategies for Small Screens#

Information Hierarchy#

Menus & Navigation Patterns

Menus & Navigation Patterns#

Rotary Encoder + Button#

Data Visualization on MCUs

Data Visualization on MCUs#

Sparklines#