HLK-LD2412 24GHz MmWave

The LD2412 is a compact and sensitive 24GHz FMCW mmWave radar module for reliable presence detection. You can use this module as a replacement for your existing LD2412 in the CeilSense, UltimateSensor v2 or UltimateSensor Mini v2, but also as a standalone unit for your own ESPHome, ESP32, or other IoT projects.

The module detects not only movement, but also stationary or micro-moving persons. This makes it ideal for applications such as room presence detection, smart lighting, Home Assistant automations, and compact radar projects.

Features

• Suitable as a replacement module
  Can be used as a replacement for the LD2412 in the CeilSense, UltimateSensor v2, and UltimateSensor Mini v2.
• Also usable standalone for your own projects
  Suitable for integration into your own electronics and home automation projects via UART and GPIO output.
• Also detects stationary persons
  Designed for presence sensing of moving, micro-moving, and stationary persons.
• Up to 9 meters detection range
  Adjustable range from approximately 0.75 to 9 meters, depending on configuration and application.
• Wide detection angle
  Detection angle of up to ±75° for a wide detection field.
• Compact size
  Small module of only 11 x 28 mm, convenient for modular sensors and compact custom designs.
• Flexibly adjustable
  Supports distance gates, sensitivity per zone, and delay times for finer tuning to your space.
• Multiple mounting options
  Supports both ceiling and wall mounting, depending on your enclosure or project setup.

Technical specifications

• Radar technology: 24GHz FMCW mmWave
• Frequency range: 24GHz – 24.25GHz
• Detection distance: 0.75 – 9 meters adjustable
• Detection angle: ±75°
• Distance resolution: 0.75 meters
• Supply voltage: 3.3V or 5V
• Average current consumption: approx. 90 mA
• Interfaces: 1x UART, 1x GPIO (3.3V logic)
• Dimensions: 11 x 28 mm
• Operating temperature: -40°C to 85°C

Applications

• CeilSense replacement
  Replace an existing LD2412 module in your CeilSense.
• UltimateSensor v2 / Mini v2 replacement
  Suitable as a standalone replacement module within the modular UltimateSensor line.
• Own projects
  Ideal for ESP32, ESPHome, Home Assistant, and other smart home or embedded applications.

Please note:

• This is a standalone radar module, not a complete sensor.
• For use as a replacement module, it is intended for products that already use an LD2412.
• For custom projects, basic knowledge of power supply, UART, and integration is recommended.