T5-4.7 E-Paper S3 Lite Quick Start

Required Libraries

Library	Version	Source
epd47	Latest	GitHub

The epd47 display driver is included in the LilyGo-EPD47 repository — use the examples directly from that repo.

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Arduino

PlatformIO (Recommended)

1. Install VS Code with the PlatformIO IDE extension
2. Clone the repository:

   git clone https://github.com/Xinyuan-LilyGO/LilyGo-EPD47.git

3. Open the project and select the S3 Lite environment in platformio.ini
4. Click ✓ to build, connect via USB-C, then click → to upload

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Arduino IDE

Board Settings

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

Steps

1. Install Arduino IDE and add ESP32 board support: https://espressif.github.io/arduino-esp32/package_esp32_index.json
2. Clone the LilyGo-EPD47 repo and open an example sketch
3. Select board settings above and click Upload

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Notes

• Display: 4.7-inch EDO47TC1, 540×960 px, with AG anti-glare glass and warm backlight — same panel as the S3 Pro but without LoRa and GPS
• Code compatibility: Fully compatible with the T5-4.7 S3 Pro examples in the same repo
• Touch: GT911 capacitive touch (I²C), same as the base T5-4.7
• RTC: PCF8563 for timekeeping

LVGL

T5-4.7 S3 Lite supports LVGL using the same epd47 driver and examples as the S3 Pro. Recommended LVGL: 8.3.x.

lv_conf.h

#define LV_COLOR_DEPTH    16
#define LV_HOR_RES_MAX   960
#define LV_VER_RES_MAX   540
#define LV_TICK_CUSTOM      1
#define LV_TICK_CUSTOM_INCLUDE "Arduino.h"
#define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis())

Hello World

#include <lvgl.h>
#include <epd47.h>

static lv_disp_draw_buf_t draw_buf;
static lv_color_t buf[960 * 60];

void disp_flush(lv_disp_drv_t *disp, 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;
    epd47.writePixelArea(area->x1, area->y1, w, h, (uint16_t *)color_p);
    lv_disp_flush_ready(disp);
}

void setup() {
    epd47.init(/*CS*/9, /*DC*/11, /*RST*/17, /*BUSY*/13);
    
    lv_init();
    lv_disp_draw_buf_init(&draw_buf, buf, NULL, 960 * 60);
    
    static lv_disp_drv_t disp_drv;
    lv_disp_drv_init(&disp_drv);
    disp_drv.hor_res = 960;
    disp_drv.ver_res = 540;
    disp_drv.flush_cb = disp_flush;
    disp_drv.draw_buf = &draw_buf;
    lv_disp_drv_register(&disp_drv);
    
    lv_obj_t *label = lv_label_create(lv_scr_act());
    lv_label_set_text(label, "T5-4.7 S3 Lite\nLVGL");
    lv_obj_align(label, LV_ALIGN_CENTER, 0, 0);
}

void loop() {
    lv_timer_handler();
    delay(10);
}

Use the epd47 examples from the same repository for complete LVGL integration. The S3 Lite shares the same display code as the S3 Pro.

Peripheral Examples

E-Paper Display (epd47)

#include <epd47.h>

void setup() {
    epd47.init(/*CS*/9, /*DC*/11, /*RST*/17, /*BUSY*/13);
    epd47.clear();
    epd47.setFont(&FreeSans12pt7b);
    epd47.setCursor(20, 60);
    epd47.print("T5-4.7 S3 Lite");
    epd47.update();
}

void loop() {}

Touch (GT911)

#include <Wire.h>
#include <TAMC_GT911.h>

#define TOUCH_SDA   17
#define TOUCH_SCL   18
#define TOUCH_INT   16
#define TOUCH_RST   -1

TAMC_GT911 tp(TOUCH_SDA, TOUCH_SCL, TOUCH_INT, TOUCH_RST, 540, 960);

void setup() {
    Serial.begin(115200);
    Wire.begin(TOUCH_SDA, TOUCH_SCL);
    tp.begin();
    tp.setRotation(ROTATION_NORMAL);
}

void loop() {
    tp.read();
    if (tp.isTouched) {
        Serial.printf("Touch X=%d Y=%d\n", tp.points[0].x, tp.points[0].y);
    }
    delay(10);
}

RTC (PCF8563)

#include <Wire.h>
#include <PCF8563.h>

PCF8563 rtc;

void setup() {
    Serial.begin(115200);
    Wire.begin();
    rtc.begin();
    // Set time: 2025-01-01 12:00:00
    rtc.setDate(1, 3, 1, 0, 25);   // day, weekday, month, century, year
    rtc.setTime(12, 0, 0);
}

void loop() {
    Time t = rtc.getTime();
    Date d = rtc.getDate();
    Serial.printf("20%02d-%02d-%02d %02d:%02d:%02d\n",
        d.year, d.month, d.day, t.hour, t.minute, t.second);
    delay(1000);
}

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FAQ

Q: What is the difference from the T5-4.7 S3 Pro? A: The Lite removes the SX1262 LoRa module and MIA-M10Q GPS to reduce cost. Display, touch, and code are identical.

Q: Cannot upload? A: Ensure USB CDC On Boot is Enabled. Hold BOOT + press RST to enter download mode if needed.