ESP32-S3-Touch screen not working

Other Hardware Displays
1

Hello all

I started a project using the waveshare ESP32-S3-Touch-LCD-7. While the communication with the serial monitor works just fine, I can’t get the screen to display anything.

First I tried to follow this guide: https://www.waveshare.com/wiki/ESP32-S3-Touch-LCD-7#Environment_Setup

As no example worked, I resorted to Gemini to get another attempt at it. But I never got more than a dimly lit backlight…

The board is connected to my PC via the UART-port and to be sure it has enough power, I connected the USB to a power supply.

I chose the ESP32S3 Dev Module in the Arduino IDE, the settings are currently as follows:

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The last code I tried (by Gemini):

#include <Arduino_GFX_Library.h>
#include <Wire.h>

#define TFT_BL 2
#define I2C_SDA 10
#define I2C_SCL 11

// Using 10MHz (10000000L) - a perfect integer divider for S3 (160/16)
Arduino_ESP32RGBPanel *bus = new Arduino_ESP32RGBPanel(
    GFX_NOT_DEFINED, GFX_NOT_DEFINED, GFX_NOT_DEFINED,
    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, 8, 4, 8,
    0, 8, 4, 8,
    10000000L 
);

Arduino_RGB_Display *gfx = new Arduino_RGB_Display(800, 480, bus, 0, true);

void setup() {
  Serial.begin(115200);
  delay(2000); // Wait for Serial
  Serial.println("--- WAVESHARE S3 REV 1.2 RECOVERY ---");

  // 1. Initialize I2C with lower frequency for stability
  Wire.begin(I2C_SDA, I2C_SCL, 100000); 

  // 2. Scan I2C to find the Expander
  Serial.println("Scanning I2C...");
  byte error, address;
  for(address = 1; address < 127; address++ ) {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
    if (error == 0) {
      Serial.printf("Found device at 0x%02X - Initializing...\n", address);
      // Attempt to wake up the expander at whatever address we found
      Wire.beginTransmission(address);
      Wire.write(0x01); 
      Wire.write(0xFF); 
      Wire.endTransmission();
    }
  }

  // 3. Enable Backlight
  pinMode(TFT_BL, OUTPUT);
  digitalWrite(TFT_BL, HIGH);
  Serial.println("Backlight pin set HIGH");

  // 4. Start Graphics
  Serial.println("Starting LCD Bus...");
  if (!gfx->begin()) {
    Serial.println("GFX Begin Failed!");
    while(1) delay(100);
  }

  gfx->fillScreen(0x07E0); // Bright Green
  gfx->setCursor(100, 200);
  gfx->setTextColor(0xFFFF);
  gfx->setTextSize(5);
  gfx->println("LINK ESTABLISHED");
  
  Serial.println("Setup Complete.");
}

void loop() {
  delay(1000);
}

In the serial monitor, this is printed:

ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce2820,len:0x116c
load:0x403c8700,len:0xc2c
load:0x403cb700,len:0x3108
entry 0x403c88b8

assert failed: lcd_ll_set_pixel_clock_prescale /IDF/components/hal/esp32s3/include/hal/lcd_ll.h:167 (prescale > 0 && prescale <= LCD_LL_PCLK_DIV_MAX)


Backtrace: 0x4037c2d9:0x3fcebc30 0x4037c2a1:0x3fcebc50 0x403830ba:0x3fcebc70 0x4201919d:0x3fcebdb0 0x4201505b:0x3fcebe00 0x420144c3:0x3fcebe40 0x420033bc:0x3fcebe70 0x42003496:0x3fcebf40 0x42002351:0x3fcebf60 0x4200810d:0x3fcebf80 0x4037d221:0x3fcebfa0




ELF file SHA256: 10d0bac60

Has anybody a sketch that should work and display something, so I can verify that the display is actually working? Or give other guidance here? I spent the last few hours with this problem, tried different libraries and so on and just can’t get anything displayed…

Thank you in advance!

2

Hi. Did it work in the meantime? I have the same device and I did try the Demo (ESP32-S3-Touch-LCD-7B Demo) from here: https://www.waveshare.com/wiki/ESP32-S3-Touch-LCD-7B and that gave me something on the display.

3

Hello

Thank you for your answer. I managed to get it running. I also used the demo and I don’t know what I did wrong the first time.

I however am really struggling with the I2C know. I’m running into conflict with different versions and just can’t solve it. I’m trying to read the data from a BME680 but nothing seems to work.

Do you have any tips regarding this matter?

4

Show your wiring diagram and a picture of the devices you are using.

5

Sorry for the delayed answer. I (or actually Claude) got it running with this code:

void I2C_init() {

    i2c_config_t conf = {

        .mode = I2C_MODE_MASTER,

        .sda_io_num = 8,

        .scl_io_num = 9,

        .sda_pullup_en = GPIO_PULLUP_ENABLE,

        .scl_pullup_en = GPIO_PULLUP_ENABLE,

        .master = { .clk_speed = 400000 }

    };

    i2c_param_config(I2C_NUM_0, &conf);

    i2c_driver_install(I2C_NUM_0, I2C_MODE_MASTER, 0, 0, 0);

    Serial.println("I2C gestartet");

}

I hope this might help someone experiencing the same and this thread can be closed.

6

Hi halbflauschmammut, I'm trying to get this board running but having a very hard time. The examples from waveshare are just utterly useless. Would you happen to have a script that works & you're currently using?