ESP32 C3 Round LCD Development Board Electronic EYE ESP32-C3FH4 0.71 inch Display Watch Screen GC9D01 160x160 SPI
ESP32 C3 Round LCD Development Board Electronic EYE ESP32-C3FH4 0.71 inch Display Watch Screen GC9D01 160x160 SPI Price range: $15.90 through $18.90
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5pcs DC-DC 0.9-3.3V to 3.3V 500mA 0.9-5V to 5V Mini Step Up Boost Power Module DC to DC For Arduino Voltage Converter Module
5pcs DC-DC 0.9-3.3V to 3.3V 500mA 0.9-5V to 5V Mini Step Up Boost Power Module DC to DC For Arduino Voltage Converter Module Price range: $4.20 through $4.50
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HLK-LD2410B 24GHz Human Presence Radar Sensor with Bluetooth and UART

Price range: $4.90 through $5.90

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Features & Compatibility

Product Wiki & Tutorials

Wire the 5 V HLK-LD2410B radar to ESP32 3.3 V logic, check its 256000-baud UART and plan ESPHome presence integration.

HLK-LD2410B with ESP32: Wiring, UART Test and Presence Detection →

HLK-LD2410B presence radar

  • 24 GHz radar intended for moving/still-target presence sensing; it does not provide a medical heart-rate measurement.
  • Use regulated 5 V power with common ground. Hi-Link specifies 3.3 V UART/output logic. Check printed pin labels before wiring.
  • Default UART is 256000 baud, 8N1. Received data uses binary frames; a plain serial text display is not a decoded target measurement.
  • Detection depends on sensitivity, gates, mounting and nearby motion. The linked Wiki includes a UART byte/OUT check and ESPHome integration guidance.

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