Similar tests with an ESP32-H2 Super Mini can be found in the folder ESP32_H2.
Cheap Aliexpress displays, tested with an ESP32-C6, Arduino IDE 2.3.2 and a modified TFT_eSPI 2.5.43 .
Board Package : esp32 3.0.3 (or 3.0.4)
Arduino IDE Board : ESP32-C6 Dev Module
USB CDC On Boot : Enabled
All three IPS displays worked stable at 80MHz.
nanoESP32-C6
Arduino IDE Board : "ESP32C6 Dev Module"
| GPIO | TFT | Description |
|---|---|---|
| 18 | CS | CS |
| 19 | SDA | MOSI |
| 20 | --- | MISO ( not used ) |
| 21 | SCL | SCLK |
| 9 | DC | DC |
| RST | RST | Reset |
| 2 | BLK | 3.3V or PWM-Pin |
| VCC | 3.3V | |
| GND | GND |
Pinout nanoESP32-C6
Edit or copy the setup file Setup431_C6_ST7789_170x320.h or Setup432_C6_ST7789_240x280.h or Setup433_C6_ST7789_240x320.h :
#define USER_SETUP_ID 431 // 432 // 433
// Driver
#define ST7789_DRIVER // Configure all registers
#define TFT_WIDTH 170 // 240 // 240 // 240
#define TFT_HEIGHT 320 // 280 // 320 // 240
//#define TFT_RGB_ORDER TFT_BGR // only for display 240x320
//#define TFT_INVERSION_ON // only for display 240x320
//Pins ESP32-C6
#define TFT_CS 18
#define TFT_MOSI 19
#define TFT_MISO 20
#define TFT_SCLK 21
#define TFT_DC 9
#define TFT_RST -1 // Set TFT_RST to -1 if display RESET is connected to ESP32 board EN
//#define TFT_BL 2 // LED backlight
#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
//#define SPI_FREQUENCY 20000000
//#define SPI_FREQUENCY 27000000 // same speed as with 20MHz
//#define SPI_FREQUENCY 40000000
#define SPI_FREQUENCY 80000000 // same speed as with 40MHz
//#define SPI_READ_FREQUENCY 20000000
//#define SPI_TOUCH_FREQUENCY 2500000
//#define SUPPORT_TRANSACTIONSEdit or copy the file User_Setup_Select.h
The ESP32-C6 is an upgraded ESP32-C3, so the code of the library TFT_eSPI works here too (but slower).
Four files were modified to verify this :
All files can be found above in the folder Arduino.