ESP32 S3 Uno with TFT Touch Shield

Projects General Guidance
1

I’m using an RM68140 3.5-inch touch shield, and it works great with Arduino Uno R3/R4.
However, when I switch to an ESP32-S3 Uno-form board, the display works fine but the touch function doesn’t.
I’m using the DIYables TFT Touch Shield library.
Has anyone experienced this issue?
https://github.com/DIYables/DIYables_TFT_Touch_Shield

/*
   Touch Get Point Example
   -----------------------
   This example demonstrates how to read and display touch coordinates using the DIYables TFT Touch Shield.

   When you touch the screen, the code prints the mapped (screen) X and Y coordinates to the Serial Monitor
   and draws a red dot at the touched location.

   **Note:**  
   The touch screen works with default calibration values.
   Just in case the touch does not work properly, run the `TouchCalibration` example
   and set the calibration values in the code using `setTouchCalibration()`.

   Provided by DIYables

   This example code is in the public domain

   Product page:
   - https://diyables.io/products/3.5-tft-lcd-color-touch-screen-shield-for-arduino-uno-mega-320x480-resolution-ili9488-driver-parallel-8-bit-interface-28pin-module-with-touch
   - https://www.amazon.com/dp/B0DQ3NQ3LW
*/

#include <DIYables_TFT_Touch_Shield.h>

#define RED DIYables_TFT::colorRGB(255, 0, 0)
#define WHITE DIYables_TFT::colorRGB(255, 255, 255)

// (Optional) Calibration values. Just in case touch does not work properly,
// run the TouchCalibration example and update the values below.
#define LEFT_X 136
#define RIGHT_X 907
#define TOP_Y 942
#define BOT_Y 139

// For Arduino Uno R3, Uno R4, Mega, Due, Giga, DIYables STEM V3/V4 (default touch pins: XP=6, YP=A1, XM=A2, YM=7)
//DIYables_TFT_RM68140_Shield TFT_display;
// For DIYables ESP32-S3 Uno-form factor (https://diyables.io/esp32-s3-uno), touch pins: XP=3, YP=1, XM=7, YM=14
DIYables_TFT_RM68140_Shield TFT_display(3, 1, 7, 14);

void setup() {
  Serial.begin(9600);
  TFT_display.begin();
  // Set the rotation (0 to 3)
  TFT_display.setRotation(0);

  TFT_display.fillScreen(WHITE);

  TFT_display.setTouchCalibration(LEFT_X, RIGHT_X, TOP_Y, BOT_Y);
  Serial.println("Touch the screen to see coordinates.");
}

void loop() {
  int x, y;
  if (TFT_display.getTouch(x, y)) {
    Serial.print("Touch at: ");
    Serial.print(x);
    Serial.print(", ");
    Serial.println(y);
    TFT_display.fillCircle(x, y, 4, RED);  // Draw a red dot where touched
    delay(200);                             // Debounce
  }
}

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2

Check the library documentation. It surely tells which controllers it's made for.

3

Hello,

That library supports that ESP32 S3 uno-form board natively.
The example is for Uno, Mega, Giga, and Due.
To make it works with that ESP32 S3 board, just need to add the below line to the setup() function

analogReadResolution(10);
4

it works, thank you.