Example Code for Arduino-Reading Data via UART

Hardware Preparation

• SEN0626 AI Visual Gesture/Face Tracking Sensor ×1
• DFR1139 FireBeetle 2 ESP32-E (N16R2） ×1

Software Preparation

• Arduino IDE Click to download Arduino IDE
• Download and install DFRobot_GestureFaceDetection
• Download and install DFRobot_RTU

Wiring Diagram

Other Preparation Work

• Step 1: Connect the sensor to the ESP32-E controller according to the wiring diagram above, and switch the communication mode selection switch on the sensor to the UART side.
• Step 2: Open Arduino IDE, copy the following code and upload it to the ESP32-E.
• Step 3: Open the serial monitor in Arduino IDE, set the baud rate to 115200, and observe the serial print results.

Sample Code

#include "DFRobot_GestureFaceDetection.h"
#define DEVICE_ID  0x72 

DFRobot_GestureFaceDetection_UART gfd(&Serial1, DEVICE_ID);

void setup(){
    Serial1.begin(9600,SERIAL_8N1, D2, D3);
    Serial.begin(115200);
    delay(1500);
    Serial.print("Product ID: ");
    Serial.println(gfd.getPid());
    Serial.print("Vendor ID: ");
    Serial.println(gfd.getVid());
}

void loop(){
    Serial.print("Faces detected: ");
    Serial.println(gfd.getFaceNumber());
    delay(1500);
}

Result

Output content of the serial monitor:

Additional Information

Interpretation:

1. First two lines: Device identity information
   • Product ID: 626: The product number of the sensor (corresponding to 0x3343 in hexadecimal);
   • Vendor ID: 13123: The vendor number (corresponding to 0x0272 in hexadecimal).
2. Third line: Face detection result
   • Faces detected: 1: Indicates that 1 face (area above the shoulders) is currently detected, and the face indicator light is on steadily at this time;
   • If there is no one, it will display Faces detected: 0, and the indicator light will turn off synchronously.

The face detection information is refreshed every 1.5 seconds, providing an intuitive feedback of the detection result.