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README.md

ESP32-C3 Super Mini and ST7789 SPI displays

Cheap Aliexpress displays, tested with an ESP32-C3 Super Mini, Arduino IDE 2.3.2 and TFT_eSPI 2.5.43

Board Package : esp32 3.0.3 ( or esp32 2.0.14 )

Arduino IDE

  • Board : "Nologo ESP32-C3 Super Mini" or "ESP32-C3 Dev Module"
  • USB CDC On Boot : Enabled (for serial monitor)
  • Upload problem :
    • Method 1: Press and hold BOOT while connecting.
    • Method 2: Press and hold the BOOT button then press the RESET button.

There is a manual for the ESP32-C3 Super Mini.

Super_Mini.png ESP32-C3 Super Mini

Problems with esp32 board package 3.0.3 and TFT_eSPI 2.5.43

are discussed here :

Connections for ESP32-C3 Super Mini and ST7789 IPS displays

GPIO TFT Description
7 CS CS
6 SDA MOSI
5 --- MISO ( not used )
4 SCL SCLK
2 DC DC
3 RST Reset
1 BLK 3.3V or PWM-Pin
VCC 3.3V
GND GND

ESP32_C3_Super_Mini Arduino IDE Board : "Nologo ESP32C3 Super Mini" or "ESP32C3 Dev Module", USB CDC On Boot : Enabled

Add Reset Pin for the ESP32-C3 Super Mini

ESP32_C3_Reset_Pin

Configuring the TFT_eSPI

Edit or copy the setup file Setup424_C3_SM_ST7789_170x320.h , Setup425_C3_SM_ST7789_240x280.h or Setup426_C3_SM_ST7789_240x320.h :

#define USER_SETUP_ID 424 // 425 // 426

// Driver
#define ST7789_DRIVER   // Configure all registers

#define TFT_WIDTH  170  // 240 // 240 
#define TFT_HEIGHT 320  // 280 // 320

//#define TFT_RGB_ORDER TFT_BGR  // only for display 240x320 
//#define TFT_INVERSION_ON       // only for display 240x320

// Pins ESP32 C3
#define TFT_CS     7
#define TFT_MOSI   6
#define TFT_MISO   5
#define TFT_SCLK   4
#define TFT_RST    3
#define TFT_DC     2
//#define TFT_BL   1

// 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_FREQUENCY  27000000  // 80/3 MHz
//#define SPI_FREQUENCY  40000000  // 80/2 MHz
#define SPI_FREQUENCY    80000000  // 80/1 MHz

Edit or copy the file Arduino/libraries/TFT_eSPI/User_Setup_Select.h

Test programs

All files can be found above in the folder Arduino.