Documentation for ESP WROVER KIT 4.1

[jcsbanks]

Is there any documentation for the above?

Particularly looking for any info on the LCD: https://github.com/loboris/ESP32_TFT_library with ESP WROVER KIT preconfig settings doesn't show anything but a white screen even with DIO and 40MHz SPI speed and PSRAM disabled.

The application it arrived with just outputted "debug", flashed the LED on the back, a quarter of the screen had monochrome lines and the other three quarters had colour.

[jcsbanks]

https://github.com/loboris/ESP32_TFT_library/issues/35

Working as ILI9341 but flipped

[jcsbanks]

Code: Select all

// ** Set the correct configuration for ESP32-WROVER-KIT v4.1
// --------------------------------------------------------
#define DEFAULT_DISP_TYPE           DISP_TYPE_ILI9341
#define DEFAULT_TFT_DISPLAY_WIDTH   240
#define DEFAULT_TFT_DISPLAY_HEIGHT  320
#define DISP_COLOR_BITS_24          0x66
#define DEFAULT_GAMMA_CURVE         0
#define DEFAULT_SPI_CLOCK           26000000
#define TFT_INVERT_ROTATION         0
#define TFT_INVERT_ROTATION1        0
#define TFT_RGB_BGR                 0x08

Works with PSRAM enabled, flash and PSRAM at 80MHz, QIO.

[Dardan]

esp-wrover_kit 4.1
arduiono ide 1.8.2
Used library "WROVER_KIT_LCD.h"
Project "spitftbitmap.ino"

If the SD card is removed, the LCD works normally, if inserted, the screen is white. The Internet does not know the problem . Can developers or experienced professionals tell me what the problem is?

[VerusLogic]

I am seeing this same issue. The SD card initializs successfully but the display is blank. The jpegtest example works but only when the SD card is out.

Mike.

[VerusLogic]

I found the problem here. The TFT uses GPIO21 for the DC pin. The SD card uses GPIO21 for the CD pin. If you remove R167 - which is at the bottom left corner of the WROVER module - it will disconnect GPIO21 from the SD card detect line and allow the LCD interface to function.

Mike.

[ESP_krzychb]

Hi Mike,

Nice tip, thank you for documenting it!
I will include this information in ESP-WROVER-KIT Getting Started Guide.