ESP32S3 HLK-LD1125H Human Presence Sensor

Published at : 23 Dec 2025

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In this tutorial, ESP32S3 MCU is programmed to show mmWave Human Presence Radar data that is received over UART on GC9A01 round display that is driven over SPI.

The human presence radar continuously sends detected object distance and its movement type. the MCU takes the data converts it and prints it on the round display.

The nicely looking user interface is designed using Square line studio with LVGL library.

The radar module is tested to detect moving objects and human behind obstacle like door or wall. check out the test results !!

GitHub Repository:
https://github.com/UsefulElectronics/esp32s3-gc9a01-lvgl

LVGL library integration tutorial:
https://youtu.be/88MwR-4Dy0Q

Useful Electronics Blogs website:
https://www.usefulelectronics.net

Thingiverse Profile:
https://www.thingiverse.com/wardzx/designs

Penetration Radar Module HLK-LD1125H 24G

https://a.aliexpress.com/_mKr6nUS

#esp32 #esp32project #embedded #embedded_systems #radar #lvgl #electronics #iotapplications #iot #lorawan #radarsensor #motionsensor