# OMGS3 - Just 25 x 10mm in size!

OMGS3 is the world’s smallest, fully-featured ESP32-S3 microcontroller board/module!

- **Seller:** [Unexpected Maker](https://lectronz.com/stores/unexpectedmaker), Moorabbin, Victoria, Australia
- **Price:** $18.00 (USD, before shipping and taxes)
- **Availability:** In stock
- **Categories:** ESP32, WiFi, Components
- **Country of origin:** Australia
- **HS code:** 8542310070
- **Product page:** https://lectronz.com/products/omgs3

## Links

- [Documentation](https://unexpectedmaker.com/datasheets/datasheet_omgs3.pdf)
- [Code](https://unexpectedmaker.com/getting-started.php)
- [Schematics](http://github.com/unexpectedmaker/esp32s3)

## Images

![OMGS3 - Just 25 x 10mm in size!](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzQxMzgsInB1ciI6ImJsb2JfaWQifX0=--68d4b68ba4a46e9e3eec7bf59517177363a5871b/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/OMGS3_V2.png)
![OMGS3 - Just 25 x 10mm in size!](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzQxMzQsInB1ciI6ImJsb2JfaWQifX0=--9f4e74b978b27810baca72f2d0f65275088ac19e/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/OMGS3_%20Both.png)
![OMGS3 - Just 25 x 10mm in size!](https://lectronz-images.b-cdn.net/lectronz/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6NzQxMjYsInB1ciI6ImJsb2JfaWQifX0=--11195d8999f64fc076529f0f0234f5c2ee2f5d81/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fbGltaXQiOls5NjAsNjQwXSwic2F2ZXIiOnsic3RyaXAiOnRydWV9fSwicHVyIjoidmFyaWF0aW9uIn19--605f1da017bcbb03ce31845cd0e81d97e3b3c574/OMGS3_pinoutpI6mMP.png)

## Description

![OMGS3 features](https://unexpectedmaker.com/images/features/main_features_omgs3.webp)

OMGS3 is the world’s smallest, fully-featured ESP32-S3 microcontroller module - just drop it on your PCB and focus on your features!

It can also be used without a carrier PCB if you want to solder wires directly to it, for those tiny little projects that need the smallest of boards!

## Features & Specifications

| | |
|---|---|
| **Processor** | ESP32-S3-PICO · 32-bit · Dual-core LX7 · up to 240 MHz |
| **Flash** | 8 MB QSPI |
| **PSRAM** | 2 MB QSPI |
| **GPIO** | 17 |
| **Wireless** | Wi-Fi 4 2.4 GHz · 802.11b/g/n · BLE 5 + Mesh |
| **USB** | D+/D− pads for an external USB connector · USB Serial/JTAG support |
| **Power** | 700 mA · 3.3 V regulator |
| **Battery** | LiPo charging · optimised power path for low-power battery use |
| **Fuel gauge** | I²C · MAX17048G+T10 |
| **Onboard** | Ultra Low-power RGB LED |
| **Antenna** | 3D high-gain antenna |
| **Connection** | 1.27 mm pitch pads |
| **Size** | 25 × 10 mm |

---

## Compare the modules.

EdgeS3[D], OMGS3, NanoS3 and TinyPICO Nano specifications

|  | [EdgeS3[D]](https://unexpectedmaker.com/dev-boards.php#edges3d) | [OMGS3](https://unexpectedmaker.com/dev-boards.php#omgs3) | [NanoS3](https://unexpectedmaker.com/dev-boards.php#nanos3) | [TinyPICO Nano](https://unexpectedmaker.com/dev-boards.php#tinypico-nano) |
|---|---|---|---|---|
| **MCU** | ESP32-S3-PICO | ESP32-S3-PICO | ESP32-S3FN8 | ESP32-PICO-D4 |
| **Processor** | Dual-core LX7 · up to 240 MHz | Dual-core LX7 · up to 240 MHz | Dual-core LX7 · up to 240 MHz | Dual-core LX6 · up to 240 MHz |
| **Flash** | 8 MB | 8 MB | 8 MB | 4 MB |
| **PSRAM** | 2 MB | 2 MB | 8 MB | 4 MB |
| **Available IO** | 29 + 8 | 17 | 27 | 27 |
| **2.4 GHz Wi-Fi** | Wi-Fi 4 | Wi-Fi 4 | Wi-Fi 4 | Wi-Fi 4 |
| **Bluetooth** | BLE 5 + Mesh | BLE 5 + Mesh | BLE 5 + Mesh | Classic BT + BLE 4.2 |
| **Zigbee / Thread** | — | — | — | — |
| **Format / connection** | M.2 B-Key module | Surface-mount module | Surface-mount module | Surface-mount module |
| **USB** | Via carrier · USB OTG / JTAG | Via carrier · USB OTG / Serial / JTAG | Via carrier · USB OTG / Serial / JTAG | Via carrier · USB-to-serial |
| **3.3 V regulators** | 1 × 700 mA | 1 × 700 mA | 1 × 700 mA | 1 × 700 mA |
| **STEMMA QT** | — | — | — | — |
| **RGB LED** | — | NeoPixel | NeoPixel | — |
| **Antenna** | Onboard + u.FL · software switch | Onboard | Onboard | Onboard |
| **Battery** | I²C fuel gauge + LiPo charging | I²C fuel gauge + LiPo charging | LiPo charging | LiPo charging |
| **Size** | 22 × 23 mm | 25 × 10 mm | 28 × 12.7 mm | 27 × 13 mm |

---

## Getting Started Using Your OMGS3

Please have a read through our [Getting Started Guide](https://unexpectedmaker.com/getting-started.php) for information on how to start using your OMGS3 Development Board.

## Code any way you like!

### Ships with CircuitPython pre-installed!

The OMGS3 ships with the latest version of CircuitPython that supports the ESP32-S3. It also ships with the UF2 bootloader, so you can easily update your OMGS3 with the latest CircuitPython firmware, whenever you desire.

Of course, you can choose from a wonderful array of other languages and platforms. Explore them all below....

- [CircuitPython](https://unexpectedmaker.com/develop.php?platform=circuitpython&mcu=esp32s3#circuitpython-setup)
- [MicroPython](https://unexpectedmaker.com/develop.php?platform=micropython&mcu=esp32s3#micropython-setup)
- [Arduino](https://unexpectedmaker.com/develop.php?platform=arduino&mcu=esp32s3#arduino-setup)
- [ESP-IDF](https://unexpectedmaker.com/develop.php?platform=espidf&mcu=esp32s3#espidf-setup)
- [PlatformIO](https://unexpectedmaker.com/develop.php?platform=platformio&mcu=esp32s3#platformio-setup)
- [.NET nanoFramework](https://unexpectedmaker.com/develop.php?platform=nanoframework&mcu=esp32s3#nanoframework-setup)
- [Rust](https://unexpectedmaker.com/develop.php?platform=rust&mcu=esp32s3#rust-setup)
- [PHP](https://unexpectedmaker.com/develop.php?platform=php&mcu=esp32s3#php-setup)
- [TinyGo](https://unexpectedmaker.com/develop.php?platform=tinygo&mcu=esp32s3#tinygo-setup)

---

## Downloads

Download OMGS3 resources, including the schematic, 3D model, KiCAD footprint and more.

### GitHub

The Unexpected Maker ESP32-S3 GitHub repository includes:

- 3D STEP files for OMGS3, its carrier and OMGUSB
- Pinout reference card for OMGS3
- KiCAD footprint for OMGS3
- Helper libraries for Arduino and CircuitPython shipping files

[Open GitHub repository →](https://github.com/UnexpectedMaker/esp32s3)

---

### Certification

OMGS3 ships uncertified. If you use a OMGS3 on a project that requires certification, you’ll be required to also certify the WiFi and Bluetooth radios as part of your final product.


## Shipping policy

All products purchased from this store ship directly from me here in Melbourne, Australia.
Orders are processed daily and usually go out within a few days!
I'm currently unable to ship to Germany, Denmark, or Sweden, but I am doing my best to work with Australia Post and Zonos about this issue; sorry for any inconvenience.
Finally, postage rates suck, and they keep going up; sorry :(