Example Code for Arduino-Recognize face (UART)

Hardware Preparation

• DFRduino UNO R3 (or similar) x 1
• Gravity: 3D Face Recognition Module - UART&I2C x1

Software Preparation

• Arduino IDE
• DFRobot_3DFace library

Wiring Diagram

Due to the high power consumption of the face recognition module, the working current is ≤400mA, and the maximum is about 2W. The VCC power supply of the Arduino digital interface cannot meet the demand. The VCC power supply of the analog port and IC2 interface can be used.

Switch the communication mode dial switch to the UART end

Other Preparation Work

Switch the communication mode dial switch to the UART end. Ensure the power supply meets the module's requirements (use Arduino's analog port or I2C interface VCC).

Sample Code

 /*!
  * @file  faceMatching.ino
  * @brief  face matching demo
  * @copyright Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
  * @license The MIT License (MIT)
  * @author ZhixinLiu([email protected])
  * @version V1.0
  * @date 2024-04-25
  * @url https://github.com/DFRobot/DFRobot_3DFace
  */

#include "DFRobot_3DFace.h"

//#define I2C_COMMUNICATION  //use I2C for communication, but use the serial port for communication if the line of codes were masked

#ifdef  I2C_COMMUNICATION
  DFRobot_3DFace_I2C face(&Wire ,DEVICE_ADDR);
#else
/* ---------------------------------------------------------------------------------------------------------------------
 *    board   |             MCU                | Leonardo/Mega2560/M0 |    UNO    | ESP8266 | ESP32 |  microbit  |   m0  |
 *     VCC    |            3.3V/5V             |        VCC           |    VCC    |   VCC   |  VCC  |     X      |  vcc  |
 *     GND    |              GND               |        GND           |    GND    |   GND   |  GND  |     X      |  gnd  |
 *     RX     |              TX                |     Serial1 TX1      |     5     |   5/D6  |  D2   |     X      |  tx1  |
 *     TX     |              RX                |     Serial1 RX1      |     4     |   4/D7  |  D3   |     X      |  rx1  |
 * ----------------------------------------------------------------------------------------------------------------------*/
/* Baud rate cannot be changed */
  #if defined(ARDUINO_AVR_UNO) || defined(ESP8266)
    SoftwareSerial mySerial(4, 5);
    DFRobot_3DFace_UART face(&mySerial ,57600);
  #elif defined(ESP32)
    DFRobot_3DFace_UART face(&Serial1 ,57600 ,/*rx*/D2 ,/*tx*/D3);
  #else
    DFRobot_3DFace_UART face(&Serial1 ,57600);
  #endif
#endif

void setup()
{
  Serial.begin(115200);
  while(!Serial);
  while(!face.begin()){
    Serial.println("NO Deivces !");
    delay(1000);
  } Serial.println("Device connected!");

  sUserData_t data = face.getFaceMessage();
  if(data.result == true){
    Serial.print("user number = ");
    Serial.println(data.user_count);
  }
}

void loop()
{
  Serial.println("face matching ..............");
  sFaceMatching_t matching = face.faceMatching();
  if(matching.result){
    Serial.println("face matching success!");
    Serial.print("matching   user id = ");
    Serial.println(matching.userID);
    Serial.print("matching   name  = ");
    Serial.println((char*)matching.name);
    Serial.println();
  }else{
    Serial.print("face matching faild cause is ");
    Serial.println(face.anaysisCode((eResponseCode_t)matching.errorCode));
  }
  delay(1000);
}

Result

The detected faces are identified in a loop, and the serial port prints the corresponding data.

Due to the high power consumption of the face recognition module, the working current is ≤400mA, and the maximum is about 2W. The VCC power supply of the Arduino digital interface cannot meet the demand. The VCC power supply of the analog port and IC2 interface can be used. `