# LILYGO T-Embed SI4732

> ESP32-S3 board with SI4732-A10 AM/FM/SW/LW radio receiver, 1.9" IPS display, 900mAh battery, and rotary encoder for a portable software-defined radio experience.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$38.96
- **CPU:** Xtensa LX7 dual-core @ 240MHz, FPU, AI instructions
- **CPU Architecture:** Xtensa LX7
- **CPU Cores:** 2
- **RAM:** 512KB SRAM
- **PSRAM:** 8MB
- **Flash:** 16MB
- **USB:** USB-C
- **Power:** 5V + LiPo
- **Operating Voltage:** 3.3V
- **Battery:** 900mAh
- **Charging Port:** USB-C
- **Antenna:** Built-in PCB antenna
- **Display:** 1.9" IPS LCD 170×320

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 5.0

## Compatible Firmware

arduino, esp-idf, micropython

## Use Cases

- am-fm-radio-receiver
- portable-media-player
- weather-station
- internet-radio

## Components

- **ESP32-S3R8** (mcu): Xtensa LX7 dual-core at 240MHz with 16MB flash, 8MB PSRAM, WiFi 802.11 b/g/n and BLE 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)
- **SI4732-A10** (radio-receiver): Silicon Labs SI4732-A10 single-chip radio receiver covering AM (520–1710 kHz), FM (64–108 MHz), shortwave (2.3–26.1 MHz), and longwave (153–279 kHz) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FSi4730-31-34-35-D60.pdf&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)
- **ST7789V** (display-driver): Sitronix ST7789V TFT LCD driver controlling the 170×320 IPS panel via SPI interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.displayfuture.com%2FDisplay%2Fdatasheet%2Fcontroller%2FST7789.pdf&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)
- **TP4056** (battery-charger): Single-cell lithium battery charger with 1A charge current and protection circuit — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdlnmh9ip6v2uc.cloudfront.net%2Fdatasheets%2FPrototyping%2FTP4056.pdf&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)

## Description

## Overview

The LILYGO T-Embed SI4732 is a compact all-in-one radio receiver development board combining the ESP32-S3 with Silicon Labs' SI4732-A10 chip, which supports AM, FM, shortwave (SW), and longwave (LW) reception across a wide frequency range. This makes it an excellent platform for building portable radio receivers and SDR-adjacent projects.

The board features a 1.9" ST7789V IPS display at 170×320 resolution for showing station information, signal strength, and custom UI elements. A built-in rotary encoder provides intuitive frequency tuning and menu navigation without additional hardware. The 900mAh LiPo battery and integrated charging circuit enable standalone portable operation.

With 16MB of flash and 8MB of PSRAM, the ESP32-S3 has ample resources for running rich radio receiver firmware such as the popular ATS-25 or PU2CLR SI4732 Arduino library. The combination of WiFi, Bluetooth, and the SI4732 radio makes it suitable for internet radio hybrids that can also receive traditional broadcasts.

The board is compatible with Arduino IDE and ESP-IDF, with strong community support through existing SI4732-based radio receiver projects.

## Where to Buy

- [undefined](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed-si4732&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export) — 38.96

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-embed-si4732&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Embed-SI4732&ref=openhardware.directory&product=lilygo-t-embed-si4732&source=md-export)

## Images

![LILYGO T-Embed SI4732](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-embed-si4732/d8320f038b3c.jpg)
![LILYGO T-Embed SI4732](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-embed-si4732/5ffc9433a536.jpg)
![LILYGO T-Embed SI4732](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-embed-si4732/70c918595731.jpg)
![LILYGO T-Embed SI4732](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-embed-si4732/233c3fd38580.jpg)
![LILYGO T-Embed SI4732](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-embed-si4732/95e177a06fed.jpg)
![LILYGO T-Embed SI4732](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-embed-si4732/0ce1229e9541.jpg)
![LILYGO T-Embed SI4732](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-embed-si4732/aa15f39401df.png)

> **Battery Powered:** Li-Po

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