T-Embed Si4732 Quick Start

Required Libraries

Library	Version	Source
LovyanGFX	Latest	GitHub
LilyGo-display-library	Latest	Xinyuan-LilyGO/LilyGo-display-library
SI4735	Latest	GitHub
FastLED	Latest	GitHub
LVGL	8.x	GitHub

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Arduino

PlatformIO (Recommended)

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

   git clone https://github.com/Xinyuan-LilyGO/T-Embed-Si4732.git

3. Open platformio.ini and select the target example
4. Click Build, connect via USB-C, then upload

Arduino IDE

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

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Display

T-Embed Si4732 uses the T-Embed 1.9-inch ST7789V TFT (320×170). Use the LilyGo_T_Embed LovyanGFX profile.

#define LILYGO_LGFX_USE_T_EMBED
#include <LilyGo_LovyanGFX.h>

LilyGo_T_Embed display;

void setup() {
  display.begin(1);
  display.setTextColor(TFT_GREEN, TFT_BLACK);
  display.setTextSize(2);
  display.drawString("SI4732 Radio", 40, 70);
}

void loop() {}

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LVGL

#define LILYGO_LGFX_USE_T_EMBED
#include <LilyGo_LovyanGFX.h>
#include <lvgl.h>

#define SCREEN_W 320
#define SCREEN_H 170

LilyGo_T_Embed display;
static lv_disp_draw_buf_t draw_buf;
static lv_color_t buf[SCREEN_W * 10];

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;
  display.startWrite();
  display.setAddrWindow(area->x1, area->y1, w, h);
  display.pushPixels((uint16_t *)color_p, w * h, true);
  display.endWrite();
  lv_disp_flush_ready(drv);
}

void setup() {
  display.begin(1);

  lv_init();
  lv_disp_draw_buf_init(&draw_buf, buf, NULL, SCREEN_W * 10);

  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);

  lv_obj_t *label = lv_label_create(lv_scr_act());
  lv_label_set_text(label, "T-Embed Si4732");
  lv_obj_center(label);
}

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

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FAQ

Q: Upload keeps failing?
A: Hold the encoder center button (BOOT), press and release RST, then upload again.