Example Code for FireBeetle ESP32-Human Presence Detection

Hardware Preparation

• FireBeetle ESP32 IoT Microcontroller (or similar) x 1
• mmWave Radar x1

Software Preparation

• Arduino IDE
• Download and install the DFRobot_mmWave Radar Library. (About how to install the library?)

Wiring Diagram

Sample Code

/*!
   @file DFRobot_mmWave_Radar.ino
   @ Read whether there is people or object moving in the detection range of the sensor.
   @ The sensor detection range and output delay time can be configured. Also you can restore the sensor to factory default settings.
   @n Experimental phenomenon: When the sensor starts successfully, 0 or 1 will be printed on the serial monitor.
   @ 0 means that there is no human or object moving in sensing area, 1 means the oppposite.
   @copyright   Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
   @licence     The MIT License (MIT)
   @version  V1.0
   @date  2023-3-13
   @https://github.com/DFRobot
*/

#include <DFRobot_mmWave_Radar.h>

HardwareSerial mySerial(1);
DFRobot_mmWave_Radar sensor(&mySerial);


void setup() {
  Serial.begin(115200);
  mySerial.begin(115200, SERIAL_8N1, D2, D3);  //RX,TX
  pinMode(LED_BUILTIN, OUTPUT);

  sensor.factoryReset();     //Restore to the factory settings
  sensor.DetRangeCfg(0, 9);  //The detection range is as far as 9m
  sensor.OutputLatency(0, 0);
}

void loop() {
  int val = sensor.readPresenceDetection();
  digitalWrite(LED_BUILTIN, val);
  Serial.println(val);
}

Result

When the sensor detects someone printing a "1", it prints a "0"; when the sensor detects no one printing, it prints a "0".