Description
The Hi-Link HLK-LD2410B detects both moving and relatively still people using 24 GHz mmWave radar. Its UART data stream matches the Raspberry Pi presence-radar project’s LD2410 protocol parser.
Project compatibility
- Requires a stable 5 V supply capable of at least 200 mA.
- Uses 3.3 V UART logic at 256000 baud; cross sensor TX/RX to the Pi’s RX/TX.
- Supports the engineering-mode frames used by the guide.
Before wiring
The module uses a fine-pitch connector rather than ordinary 2.54 mm Dupont spacing. Add a suitable 1.27 mm-to-2.54 mm cable or adapter, or solder leads carefully. Tune distance gates after mounting because walls, fans and reflective movement can produce detections.
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