This example demonstrates how to connect ILI9341-based display to modern ESP32 fork - TTGO-tDisplay in ESP-IDF. I use ESP32_TFT_library.

Alternatively you can use LVGL ported to ESP32 including various display and touchpad drivers

1. Run in terminal to configure

idf.py set-target esp32

2. configure menu

idf.py menuconfig

*Navigate to Component config -> TFT Display and set display and pin options or select a pre-defined display configuration for a kit.
Use TTGO T-DISPLAY for example

**My example utilizes external 320x240 ili9341 display and needs next changes in menuconfig and tfspi.h:

1. // ** Set the correct configuration for ESP-WROVER-KIT v4.1 
2. Changes in tftspi.h file done to use ready config, eg. ESP-WROVER-KIT v4.1
3. Connect according to next scheme:
#define PIN_NUM_MISO 27     // SPI MISO
#define PIN_NUM_MOSI 21     // SPI MOSI
#define PIN_NUM_CLK  22     // SPI CLOCK pin
#define PIN_NUM_CS   15     // Display CS pin
#define PIN_NUM_DC   32     // Display command/data pin
#define PIN_NUM_RST  26     // GPIO used for RESET control
#define PIN_NUM_BCKL  13     // GPIO used for backlight control
#define PIN_BCKL_ON   1     // GPIO value for backlight ON
#define PIN_BCKL_OFF  0     // GPIO value for backlight OFF

3. Build project

idf.py -p /dev/tty.SLAB_USBtoUART clean build flash monitor

4. Have fun!