T-Display S3 AMOLED 1.75 Quick Start

Required Libraries

Install the following libraries via the Arduino IDE Library Manager, or place them in your libraries folder:

Library	Version	Source
Arduino_GFX	1.3.7	GitHub
Arduino_DriveBus	1.1.16	GitHub
JPEGDEC	1.2.8	GitHub
LVGL	8.3.5	GitHub
SensorLib	0.2.x	GitHub

Note: Use the exact library versions listed. Newer versions may break compatibility.

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Arduino

Arduino IDE

1. Install ESP32 Board Support

1. Open Arduino IDE → File → Preferences
2. Add to "Additional Boards Manager URLs":

   https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

3. Go to Tools → Board → Boards Manager, search esp32, install esp32 by Espressif Systems

2. Install Libraries

Copy all folders from the project libraries/ directory into your Arduino libraries folder (e.g. C:\Users\YourName\Documents\Arduino\libraries).

3. Board Settings

Setting	Value
Board	ESP32S3 Dev Module
Port	Your COM port
USB CDC On Boot	Enabled
USB Mode	Hardware CDC and JTAG
USB Firmware MSC On Boot	Disabled
USB DFU On Boot	Disabled
CPU Frequency	240 MHz (WiFi)
Flash Mode	QIO 80 MHz
Flash Size	16 MB (128Mb)
Partition Scheme	16M Flash (3 MB APP / 9.9 MB FATFS)
PSRAM	OPI PSRAM
Upload Speed	921600

Note: If using battery power without USB, set USB CDC On Boot to Disabled.

4. Upload

1. Connect the board via USB-C
2. Open an example sketch
3. Click Upload

If the upload fails, hold the BOOT button and try again.

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PlatformIO

1. Setup

1. Install Visual Studio Code and the PlatformIO IDE extension
2. Clone the repository:

   git clone https://github.com/Xinyuan-LilyGO/T-Display-S3-AMOLED-1.43-1.75.git

3. Open the cloned folder in VS Code

2. Select an Example

Open platformio.ini and uncomment the src_dir line for your example. Only one line active at a time.

3. Build and Upload

• Click ✓ to compile
• Connect via USB-C
• Click → to upload

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Examples

Example	Description
FT3168	Capacitive touch example
GFX	Graphics library demo
SY6970	Power management example
Light_Sleep_Wake_Up	Light sleep / wake demo
Deep_Sleep_Wake_Up	Deep sleep / wake demo
PCF8563	RTC example
SD	SD card read/write
lvgl_benchmark	LVGL performance benchmark
iic_scan	I2C device scan (ESP-IDF)
touch	Touch function test (ESP-IDF)

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Peripheral Examples

Hello World (Arduino_GFX)

#include <Arduino_GFX_Library.h>
#include <Arduino_DriveBus_Library.h>

extern Arduino_GFX *gfx;

void setup() {
    gfx->begin();
    gfx->fillScreen(BLACK);
    gfx->setTextColor(WHITE);
    gfx->setTextSize(2);
    gfx->setCursor(30, 200);
    gfx->println("Hello 1.75!");
}

void loop() {}

For the complete board initialization sequence, open the GFX example from the T-Display-S3-AMOLED-1.43-1.75 repository.

Draw Shapes

gfx->fillCircle(140, 228, 80, BLUE);
gfx->drawRect(60, 148, 160, 160, GREEN);
gfx->fillTriangle(140, 80, 60, 380, 220, 380, RED);

Touch Input (FT3168)

#include <SensorLib.h>

SensorFT3168 touch;

void setup() {
    touch.begin(Wire, FT3168_SLAVE_ADDRESS, TOUCH_SDA, TOUCH_SCL);
}

void loop() {
    if (touch.isAvailable()) {
        touch.read();
        Serial.printf("Touch: x=%d, y=%d\n", touch.getX(), touch.getY());
    }
}

Deep Sleep Wake-Up

#define WAKE_PIN GPIO_NUM_0

void setup() {
    Serial.begin(115200);
    Serial.println("Woke up!");
    delay(2000);
    esp_sleep_enable_ext0_wakeup(WAKE_PIN, LOW);
    esp_deep_sleep_start();
}

void loop() {}

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LVGL

T-Display S3 AMOLED 1.75 supports LVGL 8.3.5. The display is driven via Arduino_DriveBus; LVGL uses Arduino_GFX's draw16bitRGBBitmap as the flush backend.

Setup lv_conf.h

Copy lv_conf.h from the project libraries/ folder into your Arduino libraries directory at the same level as the lvgl folder. Key settings for this board:

#define LV_COLOR_DEPTH  16
#define LV_HOR_RES_MAX  280   // 1.75-inch AMOLED: 280×456
#define LV_VER_RES_MAX  456

Minimal LVGL v8 Sketch

#include <Arduino_GFX_Library.h>
#include <Arduino_DriveBus_Library.h>
#include <lvgl.h>

// Display is initialised by the board library helper.
// Open the GFX example from the repo to get the full init sequence.
extern Arduino_GFX *gfx;

#define SCREEN_W 280
#define SCREEN_H 456

static lv_disp_draw_buf_t draw_buf;
static lv_color_t buf[SCREEN_W * 20];

void my_disp_flush(lv_disp_drv_t *drv, const lv_area_t *area, lv_color_t *color_p) {
    uint32_t w = area->x2 - area->x1 + 1;
    uint32_t h = area->y2 - area->y1 + 1;
    gfx->draw16bitRGBBitmap(area->x1, area->y1, (uint16_t *)color_p, w, h);
    lv_disp_flush_ready(drv);
}

void my_touchpad_read(lv_indev_drv_t *drv, lv_indev_data_t *data) {
    // Use SensorLib FT3168 — see Touch Input example above for init
    data->state = LV_INDEV_STATE_REL;
}

void setup() {
    // Board + display init (copy from GFX example)
    gfx->begin();

    lv_init();
    lv_disp_draw_buf_init(&draw_buf, buf, NULL, SCREEN_W * 20);

    static lv_disp_drv_t disp_drv;
    lv_disp_drv_init(&disp_drv);
    disp_drv.hor_res  = SCREEN_W;
    disp_drv.ver_res  = SCREEN_H;
    disp_drv.flush_cb = my_disp_flush;
    disp_drv.draw_buf = &draw_buf;
    lv_disp_drv_register(&disp_drv);

    static lv_indev_drv_t indev_drv;
    lv_indev_drv_init(&indev_drv);
    indev_drv.type    = LV_INDEV_TYPE_POINTER;
    indev_drv.read_cb = my_touchpad_read;
    lv_indev_drv_register(&indev_drv);

    lv_obj_t *label = lv_label_create(lv_scr_act());
    lv_label_set_text(label, "AMOLED 1.75");
    lv_obj_set_style_text_font(label, &lv_font_montserrat_16, 0);
    lv_obj_center(label);
}

void loop() {
    lv_timer_handler();
    delay(5);
}

Factory Example

The lvgl_benchmark example measures LVGL rendering performance on this board. Use it as a reference for buffer size tuning and draw speed optimization.

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FAQ

Board keeps failing to upload Hold the BOOT button and click Upload.

No serial output from UART Set USB CDC On Boot to Disabled in Arduino Tools if you need hardware UART output.

SY6970 instability without a battery The PMU output is unstable at 5V without a battery. Always connect a battery, or disable the battery channel in software.