Example Code for Arduino-UART

Hardware Preparation

• DFRduino UNO R3 (or similar) x 1
• Gravity: Ring 2D QR Code Scanner x1
• M-M/F-M/F-F Jumper wires

Software Preparation

• Arduino IDE
• Download and install the [GM60 Library](). (About how to install the library?)

Wiring Diagram

Other Preparation Work

Turn the DIP switch of the adapter board to UART and then burn the code into your controller.

Sample Code

/*!
 *@file detect_uart.ino
 *@brief get the qr code information
 *@details  Scan QR codes continuously and serial output the information contained in codes.
 *@copyright   Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 *@license     The MIT license (MIT)
 *@author [fengli]([email protected])
 *@version  V1.0
 *@date  2021-6-29
 *@https://github.com/DFRobot/DFRobot_GM60
*/

#include <DFRobot_GM60.h>
DFRobot_GM60_UART  gm60;
/*Use software serial when using UNO or NANO*/
#if ((defined ARDUINO_AVR_UNO) || (defined ARDUINO_AVR_NANO))
    #include <SoftwareSerial.h>
    SoftwareSerial Serial1(2, 3);  //RX, TX
    #define FPSerial Serial1
    
#else
    #define FPSerial Serial1
#endif

void setup(){
  //Rx and tx should be mapping into D2 and D3 when using Firebeetle-ESP32
  #if (defined ESP32)
     Serial1.begin(9600, SERIAL_8N1, /*rx =*/D2, /*tx =*/D3);
  #else
  Serial1.begin(9600);
  #endif
  Serial.begin(115200);
  //Init chip
  gm60.begin(Serial1);
  //Restore to factory settings
 // gm60.reset();

  /**
  Read the data encoding mode
  encode Encoding mode
           eGBK,//gbk encoding
           eUTF8,//utf8 encoding
   */
  gm60.encode(/*encode = */gm60.eUTF8);
  
  /*! Set code config, the value of chip register can be changed by using the module to scan QR code
  on true (Enable setting code)/false (Disable setting code)
  content true (Output the set code content)/false (Not output the set code content)
  */
  gm60.setupCode(/*on =*/true,/*content=*/true);
  
  /**
    Set the available types of QR code for recognition
    berCode:
    eForbidAllBarcode, //Disable all the QR code recognition
    eEnableAllBarcode, // Enable all the QR code recognition
    eEnableDefaultcode, // Enable the default QR code recognition
  */
  gm60.setIdentify(/*berCode = */gm60.eEnableAllBarcode);
  Serial.println("Start to recognize");
}

void loop(){
  delay(50);
  // Detect the data contained in the scanned QR code, and return the scanned data as a character string.
  Serial.println(gm60.detection());

}

Result

Detect the data contained in the scanned QR code, and return the scanned data as a character string and print it on the serial port.