Uploaded September 2024 | Updated September 2026, 3 weeks ago
LD2410 sensor Direct Connect to relay like smart switch
The HiLink LD2410 sensor: Works independently, LD2410 sensor without microcontroller, use pin SIG (Signal)
The HiLink LD2410 is unique because it can function without a microcontroller, unlike most sensors. This allows for a simpler setup where the sensor connects directly to a relay, essentially acting as a smart switch.
The LD2410 has a 5-pin mmWave presence sensor interface:
2 power pins
2 serial communication pins (used with microcontrollers like ESP)
1 signal pin
Here's how it works with a relay:
When the LD2410 detects movement, the signal pin sends a high signal to the connected relay.
The relay then activates automatically.
Direct Connection vs. ESP32:
While connecting directly offers simplicity, using an ESP32 microcontroller unlocks programming capabilities. This allows for features like:
Home assistant integration
Setting durations, timers, and sensor sensitivity through custom programming
Bluetooth and App Control:
Despite the lack of programmability with a direct connection, the LD2410 can still be configured for sensitivity adjustments using Bluetooth. The HLKRadarTool app (available for free on the Play Store) allows for this configuration.
Link sensor HiLink for Android
play.google.com/store/apps/details?id=com.hlk.hlkradartool&hl=en
Benefits of Direct Connection:
Simplified smart switch system: Connecting the LD2410 directly to a relay offers a more straightforward setup.
DIY-friendly: This approach is ideal for electronic enthusiasts who can build their own devices at a lower cost.
Modular design: The cable connection between the sensor and relay allows for easier repairs or replacements of individual components.
Superior Accuracy: The LD2410 utilizes a radio signal for more precise detection compared to traditional infrared (IR) motion sensors.
Applications:
The LD2410 sensor can be used in various scenarios, including:
Smart Lighting: Automate lights based on occupancy, turning them on when someone enters a room and off when empty.
Security System: Integrate the LD2410 with a security system to trigger alarms for unexpected movement in unoccupied areas.
Office Lighting Control: Automate office lighting to turn on with occupancy and conserve energy during empty periods.
Workplace Safety: Monitor access to hazardous areas and trigger alarms if unauthorized personnel enter. (Note: This specific application was mentioned in the untranslated section)
List sensor Human Presence sensor
HLK-LD1115H human body presence 4 meter, 16 meter motion detect
HLK-LD2410C up to 5 meters Wave Radar Induction Module Body Heartbeat Detection Sensors High Accuracy
HLK-LD2412 up to 9 meters adjustable wide-angle induction radar module millimeter wave radar detection
HLK-LD2420 up to 8 meter 24G Millimeter Wave Radar Sensor LD2420 FMCW Intelligent Human Body Micro Motion Module ISM Band High Sensitivity
HLK-LD2450 up to 8 meter MM Wave Human Body Motion Tracking Trajectory Radar Sensor Module LD2450 Sensing Distance 8M Smart Home
HLK-7901B up to 15 meters for water level application
LD2410 sensor Direct Connect to relay like smart switch
The HiLink LD2410 sensor: Works independently, LD2410 sensor without microcontroller, use pin SIG (Signal)
The HiLink LD2410 is unique because it can function without a microcontroller, unlike most sensors. This allows for a simpler setup where the sensor connects directly to a relay, essentially acting as a smart switch.
The LD2410 has a 5-pin mmWave presence sensor interface:
2 power pins
2 serial communication pins (used with microcontrollers like ESP)
1 signal pin
Here's how it works with a relay:
When the LD2410 detects movement, the signal pin sends a high signal to the connected relay.
The relay then activates automatically.
Direct Connection vs. ESP32:
While connecting directly offers simplicity, using an ESP32 microcontroller unlocks programming capabilities. This allows for features like:
Home assistant integration
Setting durations, timers, and sensor sensitivity through custom programming
Bluetooth and App Control:
Despite the lack of programmability with a direct connection, the LD2410 can still be configured for sensitivity adjustments using Bluetooth. The HLKRadarTool app (available for free on the Play Store) allows for this configuration.
Link sensor HiLink for Android
play.google.com/store/apps/details?id=com.hlk.hlkradartool&hl=en
Benefits of Direct Connection:
Simplified smart switch system: Connecting the LD2410 directly to a relay offers a more straightforward setup.
DIY-friendly: This approach is ideal for electronic enthusiasts who can build their own devices at a lower cost.
Modular design: The cable connection between the sensor and relay allows for easier repairs or replacements of individual components.
Superior Accuracy: The LD2410 utilizes a radio signal for more precise detection compared to traditional infrared (IR) motion sensors.
Applications:
The LD2410 sensor can be used in various scenarios, including:
Smart Lighting: Automate lights based on occupancy, turning them on when someone enters a room and off when empty.
Security System: Integrate the LD2410 with a security system to trigger alarms for unexpected movement in unoccupied areas.
Office Lighting Control: Automate office lighting to turn on with occupancy and conserve energy during empty periods.
Workplace Safety: Monitor access to hazardous areas and trigger alarms if unauthorized personnel enter. (Note: This specific application was mentioned in the untranslated section)
List sensor Human Presence sensor
HLK-LD1115H human body presence 4 meter, 16 meter motion detect
HLK-LD2410C up to 5 meters Wave Radar Induction Module Body Heartbeat Detection Sensors High Accuracy
HLK-LD2412 up to 9 meters adjustable wide-angle induction radar module millimeter wave radar detection
HLK-LD2420 up to 8 meter 24G Millimeter Wave Radar Sensor LD2420 FMCW Intelligent Human Body Micro Motion Module ISM Band High Sensitivity
HLK-LD2450 up to 8 meter MM Wave Human Body Motion Tracking Trajectory Radar Sensor Module LD2450 Sensing Distance 8M Smart Home
HLK-7901B up to 15 meters for water level application
