Example Code for Arduino-I2C

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 I2C and then burn the code into your controller.

Sample Code

/*!
 *@file detect_i2c.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>

/*!
 * @brief Constructor 
 * @param pWire I2c controller
 * @param addr  I2C address(0x1A)
 */
DFRobot_GM60_IIC  gm60;

void setup(){
  // Serial1.begin(9600);
  Serial.begin(115200);
  //Init chip
  gm60.begin();
  //Restore to factory settings
  gm60.reset();

  /**
  Read the data encoding mode
  encode Encoding mode
           eGBK,//gbk encoding
           eUTF8,//utf8 encoding
   */
  gm60.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(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 char 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.