TFT 4-inch ST7796S Display Sample Code

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library for ST7735

// Define the pins for the display (change these to match your wiring)
#define TFT_RST    9
#define TFT_DC     8
#define TFT_CS     10

// Create an instance of the Adafruit_ST7735 class
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  // Initialize the display
  tft.initR(INITR_BLACKTAB); // You may need to adjust the initialization type

  // Set the rotation (you may need to adjust this to match your display orientation)
  tft.setRotation(1); // Use 0, 1, 2, or 3 depending on your needs

  // Clear the screen and set text color
  tft.fillScreen(ST77XX_BLACK);
  tft.setTextColor(ST77XX_WHITE);

  // Set the font size
  tft.setTextSize(2);
}

void loop() {
  // Clear the screen
  tft.fillScreen(ST77XX_BLACK);

  // Display some text
  tft.setCursor(10, 10);
  tft.print("Hello, Arduino!");

  delay(2000); // Delay for 2 seconds
}