Example Code for Arduino-Background Color or Image Display

Hardware Preparation

• DFRduino UNO R3 (SKU: DFR0216) ×1
• Gravity: I2C&UART Color Display Module (SKU: DFR0997) ×1
• PH2.0-4P cable ×1
• USB cable ×1

Software Preparation

• Download Arduino IDE: Click here to download Arduino IDE
• Download Arduino library: Click here to download DFRobot_LcdDisplay library.
• For Arduino IDE V1.8.19 (or earlier), install the library manually: How to Add a Library？

Wiring Diagram

1. I2C Communication Mode:
   
   Pin Connection Description

   • Display: + Pin --- (Connect to) --- Controller: 5V
   • Display: - Pin --- (Connect to) --- Controller: GND
   • Display: C Pin --- (Connect to) --- Controller: SCL
   • Display: D Pin --- (Connect to) --- Controller: SDA

2. UART Communication Mode:
   
   Pin Connection Description

   • Display: + Pin --- (Connect to) --- Controller: 5V
   • Display: - Pin --- (Connect to) --- Controller: GND
   • Display: R Pin --- (Connect to) --- Controller: 5/TX
   • Display: T Pin --- (Connect to) --- Controller: 4/RX

Sample Code

Set the background of the display to your preferred color or a custom image.

#include "DFRobot_LcdDisplay.h"
DFRobot_Lcd_IIC lcd(&Wire, /*I2CAddr*/ 0x2c);

void setup(void){
    lcd.begin();  // Display screen initialization
    lcd.cleanScreen();
}

void loop(void)
{
    lcd.setBackgroundColor(ORANGE); // Set background color
    delay(1000);
    lcd.setBackgroundColor(0xFF0000); // Set background color, color can also be represented in hexadecimal as 0xFF0000
    delay(1000);
    lcd.setBackgroundImg(0,"bgScience.png"); // 0 -> indicates the image source is the built-in storage of the display
    delay(1000);
    lcd.setBackgroundImg(1,"UDisk_Cat.png");  // 1 -> indicates the image source is the USB flash drive storage of the display
    delay(1000);
}

Result