basicPresenceDetection.ino File Reference

#include <Arduino.h>
#include "LD2410Async.h"

Go to the source code of this file.

Macros
#define	RADAR_RX_PIN   16
	Example: Basic Presence Detection with LD2410Async.
#define	RADAR_TX_PIN   17
#define	RADAR_BAUDRATE   256000

Functions
HardwareSerial	RadarSerial (1)
void	onDetectionDataReceived (LD2410Async *sender, bool presenceDetected)
	Callback function called whenever new detection data arrives.
void	setup ()
	Arduino setup function which initializes the radar and registers the callback.
void	loop ()
	Arduino loop function which does nothing.

Variables
LD2410Async	radar (RadarSerial)
	Creates LD2410Async object bound to the serial port defined in RadarSerial.
bool	lastPresenceDetected = false
bool	firstCallback = true

Macro Definition Documentation

RADAR_BAUDRATE

#define RADAR_BAUDRATE   256000

Definition at line 24 of file basicPresenceDetection.ino.

RADAR_RX_PIN

#define RADAR_RX_PIN   16

Example: Basic Presence Detection with LD2410Async.

This sketch demonstrates how to use the LD2410Async library to detect presence using only the presenceDetected variable from the detection data callback. It prints a message with a timestamp whenever the presence state changes.

Warning

Important! Adjust RADAR_RX_PIN and RADAR_TX_PIN to match your wiring.

Definition at line 20 of file basicPresenceDetection.ino.

RADAR_TX_PIN

#define RADAR_TX_PIN   17

Definition at line 21 of file basicPresenceDetection.ino.

Function Documentation

loop()

void loop

(

)

Arduino loop function which does nothing.

The LD2410Async library runs a FreeRTOS background task that automatically handles all jobs that are related to the radar sensor. Therefore the main loop doesnt have to da any LD2410 related work and is free for anything else you might want to do.

Definition at line 103 of file basicPresenceDetection.ino.

onDetectionDataReceived()

void onDetectionDataReceived	(	LD2410Async *	sender,
		bool	presenceDetected )

Callback function called whenever new detection data arrives.

Since only basic presence information is required in the example, it is just using the presenceDetected para of the callback. The logic in this methods just ensures that only changes in presence state are printed to the Serial Monitor.

Note

If only basic presence detection is needed, use the presenceDetected variable directly instead of accessing the full detection data struct. For more advanced use cases, the full detection data can be accessed using getDetectionDataRef() or getDetectionData().

Definition at line 54 of file basicPresenceDetection.ino.

RadarSerial()

HardwareSerial RadarSerial

(

1

)

Create a HardwareSerial instance (ESP32 has multiple UARTs) bound to UART1

setup()

void setup

(

)

Arduino setup function which initializes the radar and registers the callback.

radar.begin() starts the background task of the LD2410Async library which automatically handles incoming data and triggers callbacks. The onDetectionDataReceived callback is registered to receive detection data.

Definition at line 74 of file basicPresenceDetection.ino.

Variable Documentation

firstCallback

bool firstCallback = true

Definition at line 41 of file basicPresenceDetection.ino.

lastPresenceDetected

bool lastPresenceDetected = false

Definition at line 40 of file basicPresenceDetection.ino.

radar

LD2410Async radar(RadarSerial)

(

RadarSerial

)

Creates LD2410Async object bound to the serial port defined in RadarSerial.