lcd_tft

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_I2CDevice.h>
#include <Adafruit_ST7789.h> // Hardware-specific library for ST7789
#include <SPI.h>             // Arduino SPI library
#define TFT_MOSI 23  // SDA Pin on ESP32
#define TFT_SCLK 18  // SCL Pin on ESP32
#define TFT_CS   5  // Chip select control pin
#define TFT_DC    17  // Data Command control pin
#define TFT_RST   4  // Reset pin (could connect to RST pin)


// Initialize Adafruit ST7789 TFT library
Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);
unsigned long cur_time, old_time;

int counter = 0;
char _buffer[7];

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  tft.init(240, 320, SPI_MODE2);
  tft.setRotation(3);
  tft.fillScreen(ST77XX_WHITE);
}

void loop() {
  // put your main code here, to run repeatedly:
  cur_time = millis();
  if (cur_time - old_time > 1000) {
    counter++;
    int Humi = random(50, 80);
    // read temperature in degrees Celsius
    int Temp = random(34, 40);

    // print temperature (in °C)
    tft.setTextColor(ST77XX_RED, ST77XX_WHITE);  // set text color to red with black background
    if (Temp < 0)   // if temperature < 0
      sprintf(_buffer, "-%02u.%1u", (abs(Temp) / 10) % 100, abs(Temp) % 10);
    else            // temperature >= 0
      sprintf(_buffer, "Vol: %02u.%1u", (Temp / 10) % 100, Temp % 10);

    tft.setTextSize(3);
    tft.setCursor(26, 71);
    tft.print(_buffer);

    // print humidity (in %)
    tft.setTextColor(ST77XX_CYAN, ST77XX_WHITE);  // set text color to cyan and black background
    sprintf(_buffer, "Cur: %02u.%1u", (Humi / 10) % 100, Humi % 10);
    tft.setCursor(26, 171);
    tft.print(_buffer);
    old_time = millis();
  }
}