Hi, @lexter333
LovyanGFX is my favorite because it draws faster than TFT_eSPI, but the downside is that there is little information available in English 
Using touch is very simple, you can get the coordinates by:
uint16_t x, y;
if (tft.getTouch(&x, &y)) {
do_something(x, y);
}
I think the default settings provide a decent level of touch coordinate accuracy.
However, a calibration method is prepared to improve pixel accuracy of touch coordinates, so I will post a sample code.
/*================================================================================
* Touch screen test sketch for LovyanGFX
*================================================================================*/
// Auto-detect and manual configuration settings
#define USE_AUTODETECT false
#if USE_AUTODETECT
// Some devices do not support auto-detect since the panel ID cannot be read.
#define LGFX_AUTODETECT
#include <LovyanGFX.h>
#else
// false: Panel driver: ILI9341 (micro-USB x 1 type)
// true : Panel driver: ST7789 (micro-USB x 1 + USB-C x 1 type)
#define DISPLAY_CYD_2USB true
#include "LGFX_ESP32_2432S028R_CYD.hpp"
#endif // USE_AUTODETECT
static LGFX tft;
// Set to your screen resolution and rotation
#define TFT_WIDTH 240 // Panel width
#define TFT_HEIGHT 320 // Panel height
#define TFT_ROTATION 0 // 0, 2: Portrait / 1, 3: Landscape
//----------------------------------------------------------------------
// Perform the the touch panel calibration if it is set to true
//----------------------------------------------------------------------
#define EXEC_CALIBRATION false
#if EXEC_CALIBRATION
static void calibrate_touch(uint16_t cal[8]) {
// Draw guide text on the screen.
tft.setTextDatum(textdatum_t::middle_center);
tft.drawString ("Touch the arrow tips in order", tft.width() >> 1, tft.height() >> 1);
tft.setTextDatum(textdatum_t::top_left);
uint16_t fg = TFT_WHITE;
uint16_t bg = TFT_BLACK;
// Electronic Paper Display
if (tft.isEPD()) {
std::swap(fg, bg);
}
// You will need to calibrate by touching the four corners of the screen.
tft.calibrateTouch(cal, fg, bg, std::max(tft.width(), tft.height()) >> 3);
Serial.print("\nconst uint16_t cal[8] = { ");
for (int i = 0; i < 8; i++) {
Serial.printf("%d%s", cal[i], (i < 7 ? ", " : " };\n"));
}
}
#endif // EXEC_CALIBRATION
static void tft_init(void) {
tft.init();
tft.initDMA();
tft.setColorDepth(16); // Set to 16-bit (RGB565)
tft.setRotation(TFT_ROTATION); // Set panel rotation
tft.clear(TFT_BLACK); // Clear screen with background color
tft.setTextColor(TFT_WHITE, TFT_BLACK); // Set foreground color, background color
tft.setFont(&fonts::Font2); // https://lang-ship.com/blog/files/LovyanGFX/font/
if (tft.touch()) {
#if EXEC_CALIBRATION
uint16_t cal[8];
calibrate_touch(cal);
#else
// The following is equivalent to the `_touch_instance` setting in `LGFX_ESP32_2432S028R_CYD.hpp`.
// The `cal[8]` can be replaced with the result displayed on the serial monitor after calibration.
const uint16_t cal[8] = {
240, // x_min
3700, // y_min
240, // x_min
200, // y_max
3800, // x_max
3700, // y_min
3800, // x_max
200 // y_max
};
#endif
tft.setTouchCalibrate((uint16_t*)cal);
} else {
Serial.println("Touch device not found.");
}
}
void setup() {
Serial.begin(115200);
while (millis() < 1000);
tft_init();
}
void loop() {
uint16_t x, y;
if (tft.getTouch(&x, &y)) {
Serial.println("x: " + String(x) + ", y: " + String(y));
// Draw a white spot at the detected coordinates
tft.fillCircle(x, y, 2, TFT_WHITE);
}
}
When you set the symbol EXEC_CALIBRATION to true, the following screen will be displayed to calibrate the touch panel. So touch the arrow tip in order.
Once you have finished touching the four arrows, the calibration results will be output to the serial monitor like the following:
const uint16_t cal[8] = { 252, 3700, 260, 187, 3762, 3726, 3796, 183 };
Replace this cal[8] setting with the following part of the code:
// The following is equivalent to the `_touch_instance` setting in `LGFX_ESP32_2432S028R_CYD.hpp`.
// The `cal[8]` can be replaced with the result displayed on the serial monitor after calibration.
const uint16_t cal[8] = {
240, // x_min
3700, // y_min
240, // x_min
200, // y_max
3800, // x_max
3700, // y_min
3800, // x_max
200 // y_max
};
The sample sketch is a simple drawing program.
As a bonus, I'll share a cheat sheet for LovyanGFX.
Have fun!
. I have only just got in from work at 2am so will be going to bed in a bit and then going hunting for a new car tomorrow so I’ll have a play either tomorrow evening or Thursday. I’ll let you know how I get on.