7" esp32 touchscreen documentation?

datahead2023 · October 1, 2023, 5:42pm

Hello and good day,
I bought this ESP32 touchscreen display via the web and for the life of me cannot find any documentation on the board. See Photos. The resolution is 800x480. One I am unable to find any documentation for the part number, and two I can't locate the appropriate library for the display itself. Has anyone used this board? Next time I'm going with a better documented board. The Part number on the board is as follows:
ESP32-8048s070-c

Thanks in advance for any help regarding this matter.
Veronica

cedarlakeinstruments · October 2, 2023, 1:37am

There is usually a link to documentation/source code on the page you buy these from but it can be hard to find.

I have both the 5" & 7" versions of these. I haven't gotten around to using the 7" one yet but I assume they are the same otherwise. The driver is an ST7262. Here is a link to download the board package for the arduino IDE: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json

Once you add that to your board preferences, the board will show up under the ESP32 boards section and you can select it and access the demo code, documentation, etc.

The board doesn't have a lot of IO. There's a serial port (I used it to connect to a GPS unit) and a SPI port that can possibly be reconfigured as I2C, and one or two other GPIO pins. However, the price can't be beat. $30 for a 7" TFT display is insane.

BTW: I remember that it took me forever to get it working though, so here's the configuration you'll need if you use the library that they suggest. I think many of their examples are for different hardware and they don't always make that clear. This is what worked for the ST7262.


Arduino_ESP32RGBPanel *bus = new Arduino_ESP32RGBPanel(
    GFX_NOT_DEFINED /* CS */, GFX_NOT_DEFINED /* SCK */, GFX_NOT_DEFINED /* SDA */,
    40 /* DE */, 41 /* VSYNC */, 39 /* HSYNC */, 42 /* PCLK */,
    45 /* R0 */, 48 /* R1 */, 47 /* R2 */, 21 /* R3 */, 14 /* R4 */,
    5 /* G0 */, 6 /* G1 */, 7 /* G2 */, 15 /* G3 */, 16 /* G4 */, 4 /* G5 */,
    8 /* B0 */, 3 /* B1 */, 46 /* B2 */, 9 /* B3 */, 1 /* B4 */
);

// ST7262 IPS LCD 800x480
Arduino_RPi_DPI_RGBPanel *gfx = new Arduino_RPi_DPI_RGBPanel(
    bus,
    800 /* width */, 0 /* hsync_polarity */, 8 /* hsync_front_porch */, 4 /* hsync_pulse_width */, 8 /* hsync_back_porch */,
    480 /* height */, 0 /* vsync_polarity */, 8 /* vsync_front_porch */, 4 /* vsync_pulse_width */, 8 /* vsync_back_porch */,
    1 /* pclk_active_neg */, 16000000 /* prefer_speed */, true /* auto_flush */);

datahead2023 · October 2, 2023, 4:16pm

Thanks for the information. I found this on GitHub:

https://github.com/wegi1/ESP32-8048S070-7INCH-LCD

Keeping things simple, Im using the TFT_Helloworld/Hello/HelloWorld.ino with the configuration you gave me. Code to follow:

/*******************************************************************************
 ******************************************************************************/
#include <Arduino_GFX_Library.h>

#define GFX_BL DF_GFX_BL // default backlight pin, you may replace DF_GFX_BL to actual backlight pin
#define TFT_BL 2
/* More dev device declaration: https://github.com/moononournation/Arduino_GFX/wiki/Dev-Device-Declaration */
#if defined(DISPLAY_DEV_KIT)
Arduino_GFX *gfx = create_default_Arduino_GFX();
#else /* !defined(DISPLAY_DEV_KIT) */

/* More data bus class: https://github.com/moononournation/Arduino_GFX/wiki/Data-Bus-Class */
//Arduino_DataBus *bus = create_default_Arduino_DataBus();

/* More display class: https://github.com/moononournation/Arduino_GFX/wiki/Display-Class */
//Arduino_GFX *gfx = new Arduino_ILI9341(bus, DF_GFX_RST, 0 /* rotation */, false /* IPS */);

Arduino_ESP32RGBPanel *bus = new Arduino_ESP32RGBPanel(
    GFX_NOT_DEFINED /* CS */, GFX_NOT_DEFINED /* SCK */, GFX_NOT_DEFINED /* SDA */,
    40 /* DE */, 41 /* VSYNC */, 39 /* HSYNC */, 42 /* PCLK */,
    45 /* R0 */, 48 /* R1 */, 47 /* R2 */, 21 /* R3 */, 14 /* R4 */,
    5 /* G0 */, 6 /* G1 */, 7 /* G2 */, 15 /* G3 */, 16 /* G4 */, 4 /* G5 */,
    8 /* B0 */, 3 /* B1 */, 46 /* B2 */, 9 /* B3 */, 1 /* B4 */
);
// option 1:
// 7寸 50PIN 800*480
Arduino_RPi_DPI_RGBPanel *gfx = new Arduino_RPi_DPI_RGBPanel(
  bus,
//  800 /* width */, 0 /* hsync_polarity */, 8/* hsync_front_porch */, 2 /* hsync_pulse_width */, 43/* hsync_back_porch */,
//  480 /* height */, 0 /* vsync_polarity */, 8 /* vsync_front_porch */, 2/* vsync_pulse_width */, 12 /* vsync_back_porch */,
//  1 /* pclk_active_neg */, 16000000 /* prefer_speed */, true /* auto_flush */);

    800 /* width */, 0 /* hsync_polarity */, 8 /* hsync_front_porch */, 4 /* hsync_pulse_width */, 8 /* hsync_back_porch */,
    480 /* height */, 0 /* vsync_polarity */, 8 /* vsync_front_porch */, 4 /* vsync_pulse_width */, 8 /* vsync_back_porch */,
    1 /* pclk_active_neg */, 16000000 /* prefer_speed */, true /* auto_flush */);

#endif /* !defined(DISPLAY_DEV_KIT) */
/*******************************************************************************
 * End of Arduino_GFX setting
 ******************************************************************************/

void setup(void)
{
    gfx->begin();
    gfx->fillScreen(BLACK);

#ifdef TFT_BL
    pinMode(TFT_BL, OUTPUT);
    digitalWrite(TFT_BL, HIGH);
#endif

    gfx->setCursor(10, 10);
    gfx->setTextColor(RED);
    gfx->println("Hello World!");

    delay(2000); // 5 seconds
}

void loop()
{
    gfx->setCursor(random(gfx->width()), random(gfx->height()));
    gfx->setTextColor(random(0xffff), random(0xffff));
    gfx->setTextSize(random(6) /* x scale */, random(6) /* y scale */, random(2) /* pixel_margin */);
    gfx->println("Hello World!");

    delay(1000); // 1 second
}

Its throwing an error as follows:

C:\Users\Datahead\AppData\Local\Temp\.arduinoIDE-unsaved202392-18344-ajtkxz.cxju4\sketch_oct2a\sketch_oct2a.ino:24:1: error: no matching function for call to 'Arduino_ESP32RGBPanel::Arduino_ESP32RGBPanel(int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int)'
 );
 ^
In file included from c:\Users\Datahead\OneDrive\Documents\Arduino\libraries\GFX_Library_for_Arduino\src/Arduino_GFX_Library.h:17,
                 from C:\Users\Datahead\AppData\Local\Temp\.arduinoIDE-unsaved202392-18344-ajtkxz.cxju4\sketch_oct2a\sketch_oct2a.ino:3:
c:\Users\Datahead\OneDrive\Documents\Arduino\libraries\GFX_Library_for_Arduino\src/databus/Arduino_ESP32RGBPanel.h:59:3: note: candidate: 'Arduino_ESP32RGBPanel::Arduino_ESP32RGBPanel(int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, int8_t, uint16_t, uint16_t, uint16_t, uint16_t, uint16_t, uint16_t, uint16_t, uint16_t, uint16_t, int32_t, bool, uint16_t, uint16_t)'
   Arduino_ESP32RGBPanel(
   ^~~~~~~~~~~~~~~~~~~~~
c:\Users\Datahead\OneDrive\Documents\Arduino\libraries\GFX_Library_for_Arduino\src/databus/Arduino_ESP32RGBPanel.h:59:3: note:   candidate expects 33 arguments, 23 provided
c:\Users\Datahead\OneDrive\Documents\Arduino\libraries\GFX_Library_for_Arduino\src/databus/Arduino_ESP32RGBPanel.h:56:7: note: candidate: 'constexpr Arduino_ESP32RGBPanel::Arduino_ESP32RGBPanel(const Arduino_ESP32RGBPanel&)'
 class Arduino_ESP32RGBPanel
       ^~~~~~~~~~~~~~~~~~~~~
c:\Users\Datahead\OneDrive\Documents\Arduino\libraries\GFX_Library_for_Arduino\src/databus/Arduino_ESP32RGBPanel.h:56:7: note:   candidate expects 1 argument, 23 provided
c:\Users\Datahead\OneDrive\Documents\Arduino\libraries\GFX_Library_for_Arduino\src/databus/Arduino_ESP32RGBPanel.h:56:7: note: candidate: 'constexpr Arduino_ESP32RGBPanel::Arduino_ESP32RGBPanel(Arduino_ESP32RGBPanel&&)'
c:\Users\Datahead\OneDrive\Documents\Arduino\libraries\GFX_Library_for_Arduino\src/databus/Arduino_ESP32RGBPanel.h:56:7: note:   candidate expects 1 argument, 23 provided
C:\Users\Datahead\AppData\Local\Temp\.arduinoIDE-unsaved202392-18344-ajtkxz.cxju4\sketch_oct2a\sketch_oct2a.ino:27:1: error: 'Arduino_RPi_DPI_RGBPanel' does not name a type; did you mean 'Arduino_ESP32RGBPanel'?
 Arduino_RPi_DPI_RGBPanel *gfx = new Arduino_RPi_DPI_RGBPanel(
 ^~~~~~~~~~~~~~~~~~~~~~~~
 Arduino_ESP32RGBPanel
C:\Users\Datahead\AppData\Local\Temp\.arduinoIDE-unsaved202392-18344-ajtkxz.cxju4\sketch_oct2a\sketch_oct2a.ino: In function 'void setup()':
C:\Users\Datahead\AppData\Local\Temp\.arduinoIDE-unsaved202392-18344-ajtkxz.cxju4\sketch_oct2a\sketch_oct2a.ino:44:5: error: 'gfx' was not declared in this scope
     gfx->begin();
     ^~~
C:\Users\Datahead\AppData\Local\Temp\.arduinoIDE-unsaved202392-18344-ajtkxz.cxju4\sketch_oct2a\sketch_oct2a.ino: In function 'void loop()':
C:\Users\Datahead\AppData\Local\Temp\.arduinoIDE-unsaved202392-18344-ajtkxz.cxju4\sketch_oct2a\sketch_oct2a.ino:61:5: error: 'gfx' was not declared in this scope
     gfx->setCursor(random(gfx->width()), random(gfx->height()));
     ^~~

exit status 1

Compilation error: no matching function for call to 'Arduino_ESP32RGBPanel::Arduino_ESP32RGBPanel(int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int)'

Any thoughts you may have would be greatly apreciated.
thanks,
Veronica

PS: Im about 20 years rusty on my coding skills, so I'm re-learning all the stuff I forgot.

cedarlakeinstruments · October 3, 2023, 3:17am

I believe you have to use a specific version of the library. IIRC, the problem I ran into was that the new versions changed the signature of that constructor

Hope that's the problem!

datahead2023 · October 5, 2023, 5:40pm

Good Morning ,
They say the only stupid question is the one that isn't asked, so here goes. I finally found the schematics and documentation of the board in question, After reading the schematic it's truly a basic straight forward circuit. My question is the following part of the code setting the pin assignments for the device etc.?

JC8048B070N (1).pdf (963.7 KB)

Arduino_ESP32RGBPanel *bus = new Arduino_ESP32RGBPanel(
    GFX_NOT_DEFINED /* CS */, GFX_NOT_DEFINED /* SCK */, GFX_NOT_DEFINED /* SDA */,
    40 /* DE */, 41 /* VSYNC */, 39 /* HSYNC */, 42 /* PCLK */,
    45 /* R0 */, 48 /* R1 */, 47 /* R2 */, 21 /* R3 */, 14 /* R4 */,
    5 /* G0 */, 6 /* G1 */, 7 /* G2 */, 15 /* G3 */, 16 /* G4 */, 4 /* G5 */,
    8 /* B0 */, 3 /* B1 */, 46 /* B2 */, 9 /* B3 */, 1 /* B4 */
);
// option 1:
// 7寸 50PIN 800*480
Arduino_RPi_DPI_RGBPanel *gfx = new Arduino_RPi_DPI_RGBPanel(
  bus,
//  800 /* width */, 0 /* hsync_polarity */, 8/* hsync_front_porch */, 2 /* hsync_pulse_width */, 43/* hsync_back_porch */,
//  480 /* height */, 0 /* vsync_polarity */, 8 /* vsync_front_porch */, 2/* vsync_pulse_width */, 12 /* vsync_back_porch */,
//  1 /* pclk_active_neg */, 16000000 /* prefer_speed */, true /* auto_flush */);

    800 /* width */, 0 /* hsync_polarity */, 8 /* hsync_front_porch */, 4 /* hsync_pulse_width */, 8 /* hsync_back_porch */,
    480 /* height */, 0 /* vsync_polarity */, 8 /* vsync_front_porch */, 4 /* vsync_pulse_width */, 8 /* vsync_back_porch */,
    1 /* pclk_active_neg */, 16000000 /* prefer_speed */, true /* auto_flush */);

#endif /* !defined(DISPLAY_DEV_KIT) */

Thank for the assistance.
Veronica

cedarlakeinstruments · October 5, 2023, 11:53pm

Yes, I believe that the constructor for Arduino_ESP32RGBPanel is setting the pins used for connecting the display I/O to the onboard ESP32 (hopefully they're the same on your board) and Arduino_RPi_DPI_RGBPanel's constructor is setting the display video parameters.

system · April 2, 2024, 11:53pm

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.

alexdevbr · June 6, 2024, 1:06pm

To use newer versions of the Arduino GFX library change the code to this:

Arduino_ESP32RGBPanel *rgbpanel = new Arduino_ESP32RGBPanel(
    41 /* DE */, 40 /* VSYNC */, 39 /* HSYNC */, 42 /* PCLK */,
    14 /* R0 */, 21 /* R1 */, 47 /* R2 */, 48 /* R3 */, 45 /* R4 */,
    9 /* G0 */, 46 /* G1 */, 3 /* G2 */, 8 /* G3 */, 16 /* G4 */, 1 /* G5 */,
    15 /* B0 */, 7 /* B1 */, 6 /* B2 */, 5 /* B3 */, 4 /* B4 */,
    0 /* hsync_polarity */, 180 /* hsync_front_porch */, 30 /* hsync_pulse_width */, 16 /* hsync_back_porch */,
    0 /* vsync_polarity */, 12 /* vsync_front_porch */, 13 /* vsync_pulse_width */, 10 /* vsync_back_porch */,
    1 /* pclk_active_neg */
);
Arduino_RGB_Display *gfx = new Arduino_RGB_Display(
    800 /* width */, 480 /* height */, rgbpanel, 0 /* rotation */, true /* auto_flush */);

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7" esp32 touchscreen documentation?

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