Example Code for Arduino-Register face (I2C)

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

Turn the dial switch for switching communication mode to the I2C end

Other Preparation Work

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

Sample Code

 /*!
  * @file  faceRecognition.ino
  * @brief  face recognition 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 2023-12-07
  * @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);
  randomSeed(analogRead(A0));
  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);
  }

  Serial.println("face resgistering !");
  char rName[40] = {0};
  uint16_t randNumber = random(analogRead(A0));
  sprintf(rName, "rName%d", randNumber);
  sFaceReg_t faceReg = face.faceRegistration(rName);
  if(faceReg.result){
    Serial.println("face resgistering success!");
    Serial.print("regiseter     user name = ");
    Serial.println(rName);
    Serial.print("regiseter     user id = ");
    Serial.println(faceReg.userID);
    Serial.print("register      direction = ");
    Serial.println(faceReg.direction);
    Serial.println();
  }else{
    Serial.print("face resgistering faild cause = ");
    Serial.println(face.anaysisCode((eResponseCode_t)faceReg.errorCode));
  }
}

void loop()
{
  delay(1000);
}

Result

Register a face once, and the serial port prints the corresponding data

Additional Information

Turn the dial switch for switching communication mode to the I2C end.