Three IPS Displays with ST7789. Same 8 pin connector

Resolution 170x320, 240x280 and 240x320

Aliexpress Displays between 2€ and 5€, tested with ESP32 Wemos lite, Arduino IDE 2.3.2 and TFT_eSPI 2.5.43.

Arduino IDE Board : "WEMOS LOLIN32 Lite"

All three displays work stable with 80MHz, even with a 50cm long cable between ESP32 and display.

Similar tests but with an RP2040 and more displays can be found in the folder RP2040.

Test	170x320	240x280	240x320
Bouncy_Circles	88 fps	73 fps	65 fps
boing_ball	134 fps	133 fps	136 fps
SpriteRotatingCube	303 fps	303 fps	303 fps
Display Surface	matte	matte	glossy
Power Consumption	34 mA	41 mA	48 mA

Front

Back

• Arduino\TFT_graphicstest_170x320.ino ( modified )
• Arduino\TFT_graphicstest_240x280.ino ( modified )
• Arduino\TFT_graphicstest_240x320.ino ( modified )

Arduino\Bouncy_Circles.ino and Arduino\SpriteRotatingCube.ino and Arduino\boing_ball.ino ( not modified )

• Arduino\show_pictures_170x320.ino
• Arduino\show_pictures_240x280.ino
• Arduino\show_pictures_240x320.ino

Connections for Wemos Lolin32 lite

GPIO	TFT	Description
23	SDA	MOSI Hardware SPI
18	SCK	CLK Hardware SPI
5	CS	CS
17	DC	DC
EN	RES	Reset
	BLK	3.3V ( or PWM-Pin )
	VCC	3.3V
	GND	GND

Configure the library TFT_eSPI

Edit the file Arduino\libraries\TFT_eSPI\User_Setup_Select.h

// Only **ONE** line below should be uncommented to define your setup.

//#include <User_Setup.h>                // Default setup is root library folder

// new setup file in folder Arduino/libraries, so updates will not overwrite your setups.
#include <../Setup407_ST7789_320x170.h>  // new setup file for  ST7789 170x320 
//#include <../Setup408_ST7789_280x240.h>  // new setup file for  ST7789 240x280 
//#include <../Setup409_ST7789_320x240.h>  // new setup file for  ST7789 240x320 

Create the new files :

• Arduino\libraries\Setup407_ST7789_320x170.h
• Arduino\libraries\Setup408_ST7789_280x240.h
• Arduino\libraries\Setup409_ST7789_320x240.h

#define USER_SETUP_ID 407

// Driver
#define ST7789_DRIVER            // Configure all registers
#define TFT_WIDTH  170
#define TFT_HEIGHT 320
#define TFT_INVERSION_ON
#define TFT_BACKLIGHT_ON 1

//#define TFT_RGB_ORDER TFT_BGR  // !!! Only for Display 240x320 !!!

// Pins
#define TFT_BL     -1            // 16  // LED backlight
#define TFT_MISO   -1            // Not connected
#define TFT_MOSI   23
#define TFT_SCLK   18
#define TFT_CS      5 
#define TFT_DC     17
#define TFT_RST    -1            // Set TFT_RST to -1 if display RESET is connected to ESP32 board EN

// Fonts
#define LOAD_GLCD
#define LOAD_FONT2
#define LOAD_FONT4
#define LOAD_FONT6
#define LOAD_FONT7
#define LOAD_FONT8
//#define LOAD_FONT8N
#define LOAD_GFXFF
#define SMOOTH_FONT

// Other options
//#define SPI_READ_FREQUENCY    20000000
//#define SPI_FREQUENCY         40000000
#define SPI_FREQUENCY         80000000

Test programs

All files can be found above in the folder Arduino.

Setup :

• Arduino\libraries\Setup407_ST7789_320x170.h
• Arduino\libraries\Setup408_ST7789_280x240.h
• Arduino\libraries\Setup409_ST7789_320x240.h
• Arduino\libraries\TFT_eSPI\User_Setup_Select.h

Benchmark :

• Arduino\TFT_graphicstest_170x320.ino ( modified )
• Arduino\TFT_graphicstest_240x280.ino ( modified )
• Arduino\TFT_graphicstest_240x320.ino ( modified )

Show Pictures :

• Arduino\show_pictures_170x320.ino
• Arduino\show_pictures_240x280.ino
• Arduino\show_pictures_240x320.ino

Original TFT_eSPI Examples :

• boing_ball.ino
• Bouncy_Circles.ino
• SpriteRotatingCube.ino
• TFT_graphicstest_PDQ ( for Display 240x320 )