Hello Felix, After reviewing everything, I have discovered that the issue lies in the initialization performed in the Arduino_ST7789 library. In the Arduino_ST7789.cpp file, SPI.begin(); is used when to utilize hardware SPI, it should be initialized with SPI.begin(TFT_SCLK, TFT_MISO, TFT_MOSI, TFT_CS); "// Constructor when using hardware SPI. Faster, but must use SPI pins // specific to each board type (e.g. 11,13 for Uno, 51,52 for Mega, etc.) // Parece que solo vale para 4-wire. Adaptar a 3-wire. Arduino_ST7789::Arduino_ST7789(int8_t dc, int8_t rst, int8_t cs) : Adafruit_GFX(ST7789_TFTWIDTH, ST7789_TFTHEIGHT) { _cs = cs; _dc = dc; _rst = rst; _hwSPI = true; //THIS LINE APPLY HARDWARE SPI _SPI9bit = false; _sid = _sclk = -1; }" After call "// Initialization code common to all ST7789 displays void Arduino_ST7789::commonInit(const uint8_t *cmdList) {......." in this part into "if(_hwSPI) { // Using hardware SPI #if defined (SPI_HAS_TRANSACTION) //SPI.begin(); //THIS LINE IS BAD FOR HARDWARE INIT SPI.begin(TFT_SCLK, TFT_MISO, TFT_MOSI, TFT_CS); // BY ME mySPISettings = SPISettings(48000000, MSBFIRST, SPI_MODE2); // BY ME" Always in the file.ino define pins: " #define TFT_MISO -1 #define TFT_MOSI 7 #define TFT_SCLK 6 #define TFT_CS 5 #define TFT_DC 4 #define TFT_RST 0 " call with: "Arduino_ST7789 tft = Arduino_ST7789(TFT_DC, TFT_RST, TFT_CS); //for display with CS pin // <--- MODO SPI HARDARE (4-wire)" In summary... I think that It wasn't working because the SPI was not initialized with the pin parameters and Mode 2 (function 2 of the IO_MUX) that activates pins 4, 5, 6, 7 (see page 169 of the ESP32-C3 datasheet). In the schematic, it can be seen that M5stack associates the SPI with pins 19, 20, 21, 22, 23, 24 in Mode 0 (function 0 of the IO_MUX), which needs to be initialized correctly... For drawing text or lines, etc., using Software SPI isn't a problem. However, if images, fillscreen();, or other graphical elements are displayed, then Hardware SPI is necessary (not necesary 48Mhz, i put in the code), or else everything will be very slow on the screen. datasheet: https://www.espressif.com/sites/default/files/documentation/esp32-c3_technical_reference_manual_en.pdf Schematic M5Stack Stamp C3: https://docs.m5stack.com/en/core/stamp_c3 I am happy!! It works now!!. Thank you for your time and attention. Best regards,