# T-Embed SI4732 (LILYGO)

> A T-Embed with an SI4732 broadcast receiver for AM, FM, shortwave and longwave with RDS.

- **Category:** Radio & mesh
- **Availability:** Listed by maker
- **Price:** US$38.96 (at lilygo.cc), checked 2026-09-17
- **Good for:** Listen to shortwave and broadcast bands on a hackable pocket receiver.
- **You'll need:** A suitable antenna for the band you want.
- **Trade-off:** Receive only; no transmit radios.
- **Page:** https://gadgets.sh/devices/lilygo-t-embed-si4732/

## Where to buy

| Shop | Status | Link |
|---|---|---|
| LILYGO | Orderable | https://lilygo.cc/products/t-embed-si4732?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=lilygo-t-embed-si4732&utm_content=api |
| OpenELAB | Orderable | https://openelab.io/products/lilygo-t-embed-si4732?utm_source=gadgets.sh&utm_medium=referral&utm_campaign=lilygo-t-embed-si4732&utm_content=api |

## Blueprint

**Schematics published.** LILYGO's shared T-Embed repo has a PDF schematic specific to the SI4732 variant plus STL/STEP shell files; no editable PCB source.

### Design files

- schematic: [T-Embed-SI4732 schematic (PDF)](https://github.com/Xinyuan-LilyGO/T-Embed/blob/main/schematic/T-Embed-SI4732.pdf) (PDF)
- enclosure: [T-Embed shell (STEP)](https://github.com/Xinyuan-LilyGO/T-Embed/blob/main/Shell_file/t-embed_normal-shell.stp) (STEP)

### Source repositories

- [Xinyuan-LilyGO/T-Embed](https://github.com/Xinyuan-LilyGO/T-Embed) — hardware, MIT, ★267

### Key parts

| Part | Role | Datasheet |
|---|---|---|
| ESP32-S3 | MCU + Wi-Fi/BT | https://www.espressif.com/sites/default/files/documentation/esp32-s3_datasheet_en.pdf |
| Si4732-A10 | AM/FM/SW/LW radio receiver | https://www.skyworksinc.com/-/media/Skyworks/SL/documents/public/data-shorts/Si4732-A10-short.pdf |
| ST7789V | display driver |  |

_Notes:_ The T-Embed repo (base, MIT) covers all T-Embed variants including this SI4732 radio version; it has both a variant-specific schematic PDF and a generic schematic.pdf. Si4732 line moved from Silicon Labs to Skyworks after acquisition.

### Raw source files

Direct links an agent or KiCad can open (the viewer on the page reads the same files).

- 3D model (STEP, 0.7 MB): [T-Embed shell (STEP)](https://raw.githubusercontent.com/Xinyuan-LilyGO/T-Embed/main/Shell_file/t-embed_normal-shell.stp)
- 3D model (STEP, 2.6 MB): [t embed normal full shell](https://raw.githubusercontent.com/Xinyuan-LilyGO/T-Embed/main/Shell_file/t-embed_normal-full-shell.stp)
- 3D model (STEP, 2.3 MB): [t embed Thin](https://raw.githubusercontent.com/Xinyuan-LilyGO/T-Embed/main/Shell_file/t-embed_Thin.stp)
- 3D model (STEP, 0.6 MB): [t embed big shell](https://raw.githubusercontent.com/Xinyuan-LilyGO/T-Embed/main/Shell_file/t_embed_big-shell.stp)
- 3D model (STEP, 0.6 MB): [t embed normal shell 1204](https://raw.githubusercontent.com/Xinyuan-LilyGO/T-Embed/main/Shell_file/t-embed_normal-shell-1204.stp)

## Specifications

### Core hardware

| | |
|---|---|
| Processor | ESP32-S3 · 16 MB flash · 8 MB PSRAM |
| Display | 1.9″ ST7789V IPS · 170 × 320 |
| Radios | Si4732-A10 AM/FM/SW/LW receiver with RDS · 2.4 GHz Wi-Fi · Bluetooth LE 5 |
| Power | 900 mAh battery (702550) |

### Details from the product page

| | |
|---|---|
| Receiver | Si4732-A10 DSP tuner IC |
| Bands | AM, FM, shortwave, longwave; RDS on FM |
| Development | Arduino, ESP-IDF |

### Buying

| | |
|---|---|
| Price | US$38.96 on lilygo.cc |
| Availability | In stock on the day of review |

## Documentation

- [Maker product page](https://lilygo.cc/products/t-embed-si4732)
- [LILYGO GitHub organisation](https://github.com/Xinyuan-LilyGO)
- [LILYGO FAQ and support](https://lilygo.cc/pages/faqs)

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Source: gadgets.sh · https://gadgets.sh/devices/lilygo-t-embed-si4732/ · JSON: https://gadgets.sh/api/v1/devices/lilygo-t-embed-si4732.json