Developer Created Radar-Linked Weather Display
A new custom device uses presence-sensing technology to toggle weather screen visibility.
Updated on Oct. 5, 2026 in Current Conditions
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A developer has built a smart weather display using an ESP32 microcontroller and a human presence radar module. The device automatically activates its screen only when it detects someone nearby to conserve energy.
Why it matters
By integrating millimeter-wave radar with weather data, this project demonstrates a novel approach to power management in smart home displays. The system ensures information is only displayed when an observer is present to view it.
The device features a 4-inch ST7796 display module paired with a Hi-Link HLK-LD2410C millimeter-wave sensor. It utilizes a Freenove FNK0103S board with an ESP32-WROOM-32E to process weather data from Open-Meteo.
The players
Open-Meteo
This is an open-source weather data provider that offers free access to weather and climate data through various APIs.
Hi-Link
This manufacturer specializes in wireless modules, including the millimeter-wave sensor technology used in this presence-detection project.
The details
The project utilizes an XPT2046 resistive touchscreen and supports multiple languages including GB, ES, DE, FR, UA, SE, IT, and RU. Users can house the internal components within a 3D-printable enclosure and stand.
Timeline
The project documentation was published on October 5, 2026.
Seasonal Patterns
This project builds upon the established versatility of the ESP32-WROOM-32E to enable low-power IoT sensing capabilities. The implementation marks a shift toward highly customized, context-aware smart home devices that prioritize efficient energy usage.
This project offers hobbyists a blueprint for building a responsive, low-power display that avoids light pollution when a room is empty. Makers can download the designs to print a custom stand and enclosure to suit their home setup.
The takeaway
Integrating presence detection into smart displays provides a practical way to reduce unnecessary energy consumption in home automation. This project highlights how readily available sensors can transform static information dashboards into interactive, responsive tools.
Further reading
For more on monitoring atmospheric data, visit the Current Conditions section.
Source note: This article includes information reported by XDA-Developers.
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Would you choose smart home displays that feature automatic motion-based power saving modes?
